Refine
Has Fulltext
- yes (374)
Is part of the Bibliography
- yes (374) (remove)
Year of publication
- 2024 (12)
- 2023 (23)
- 2022 (41)
- 2021 (49)
- 2020 (34)
- 2019 (28)
- 2018 (16)
- 2017 (7)
- 2016 (18)
- 2015 (10)
- 2014 (3)
- 2013 (6)
- 2012 (8)
- 2011 (7)
- 2010 (7)
- 2009 (4)
- 2008 (6)
- 2007 (7)
- 2006 (2)
- 2005 (3)
- 2004 (3)
- 2003 (2)
- 1994 (15)
- 1993 (6)
- 1992 (6)
- 1991 (7)
- 1990 (7)
- 1989 (7)
- 1988 (5)
- 1987 (4)
- 1986 (4)
- 1985 (1)
- 1984 (1)
- 1983 (4)
- 1982 (1)
- 1979 (1)
- 1978 (1)
- 1975 (2)
- 1974 (1)
- 1973 (2)
- 1972 (2)
- 1971 (1)
Document Type
- Journal article (243)
- Doctoral Thesis (115)
- Preprint (14)
- Book article / Book chapter (1)
- Report (1)
Language
- English (374) (remove)
Keywords
- Organische Chemie (68)
- Supramolekulare Chemie (21)
- Selbstorganisation (18)
- self-assembly (17)
- fluorescence (14)
- Farbstoff (13)
- perylene bisimide (13)
- water oxidation (12)
- Merocyanine (11)
- RNA (11)
- Fluoreszenz (10)
- Perylenbisimid (10)
- Perylenderivate (10)
- Aggregation (9)
- supramolecular chemistry (9)
- Chemie (8)
- Elektronentransfer (8)
- photocatalysis (8)
- SARS-CoV-2 (7)
- polycyclic aromatic hydrocarbons (7)
- Squaraine (6)
- catalysis (6)
- dyes (6)
- energy transfer (6)
- in vitro selection (6)
- organic chemistry (6)
- Chemische Synthese (5)
- Chromophor (5)
- Exziton (5)
- Katalyse (5)
- Nucleinsäuren (5)
- Self-assembly (5)
- dyes/pigments (5)
- liquid crystals (5)
- luminescence (5)
- DNA (4)
- Flüssigkristall (4)
- Ladungstransfer (4)
- Metallosupramolekulare Chemie (4)
- NMR-Spektroskopie (4)
- Naphthylisochinolinalkaloide (4)
- Perylenbisdicarboximide <Perylen-3,4:9,10-bis(dicarboximide)> (4)
- Perylene Bisimide (4)
- Polymere (4)
- Ruthenium complexes (4)
- Supramolekulare Struktur (4)
- Wasseroxidation (4)
- aggregation (4)
- boranes (4)
- chemistry (4)
- chirality (4)
- circular dichroism (4)
- exciton coupling (4)
- macrocycles (4)
- organic solar cells (4)
- photoinduced electron transfer (4)
- ruthenium complexes (4)
- sphingolipids (4)
- structure elucidation (4)
- transient absorption (4)
- Aggregat <Chemie> (3)
- Ancistrocladaceae (3)
- C-C coupling (3)
- Chirality (3)
- Chiralität <Chemie> (3)
- DNS (3)
- Deoxyribozymes (3)
- Energietransfer (3)
- Fluorescence (3)
- Fotokatalyse (3)
- Hydrogel (3)
- Merocyanin (3)
- Polycyclische Aromaten (3)
- Quantenchemie (3)
- RNA modification (3)
- Ruthenium Komplexe (3)
- Selbstassemblierung (3)
- Self-Assembly (3)
- Triarylamine (3)
- Wasser (3)
- X-ray crystallography (3)
- absolute configuration (3)
- aromaticity (3)
- artificial photosynthesis (3)
- cell imaging (3)
- ceramide (3)
- ceramides (3)
- deoxyribozymes (3)
- electron transfer (3)
- homogeneous catalysis (3)
- kinetics (3)
- merocyanines (3)
- metallosupramolecular chemistry (3)
- molecular docking (3)
- naphthylisoquinoline alkaloids (3)
- non-covalent interactions (3)
- organic photodiodes (3)
- organische Solarzelle (3)
- pentacene (3)
- spectroscopy (3)
- transient absorption spectroscopy (3)
- triarylamine (3)
- 10-bis(dicarboximide)> (2)
- 4:9 (2)
- Ancistrocladus (2)
- Anorganische Chemie (2)
- Aptamer (2)
- Aromatically annulated triquinacenes (2)
- Aromatisch anellierte Triquinacene (2)
- Chili RNA Aptamer (2)
- Chiralität (2)
- Click-Chemie (2)
- Corannulene (2)
- Design (2)
- Dyade (2)
- Dyes (2)
- Energy Transfer (2)
- Epitranscriptomics (2)
- Exciton coupling (2)
- Exzitonenkopplung (2)
- FRET (2)
- Fluoreszenz-Resonanz-Energie-Transfer (2)
- G-quadruplexes (2)
- Gold (2)
- Guanidinderivate (2)
- Holothuria spinifera (2)
- J- and H-Aggregate (2)
- J- and H-Aggregates (2)
- J‐aggregates (2)
- LC-HRESIMS (2)
- Liquid Crystal (2)
- Merocyanine dyes (2)
- Methyltransferase (2)
- Molekulare Erkennung (2)
- Nucleoside (2)
- Oligomere (2)
- Organic Chemistry (2)
- Organische Solarzelle (2)
- Organische Synthese (2)
- Organischer Feldeffekttransistor (2)
- Organischer Halbleiter (2)
- Oxidation (2)
- Perylenbisdicarboximide (2)
- Perylenbisdicarboximide <Perylen-3 (2)
- Perylenbisimide (2)
- Perylene bisimide (2)
- Photochemistry (2)
- Photosensibilisator (2)
- Pyrene (2)
- RNA Enzymes (2)
- RNA labeling (2)
- RNA-dependent RNA polymerase (2)
- RNS (2)
- Ringöffnungspolymerisation (2)
- Rutheniumkomplexe (2)
- Scheibe-Aggregat (2)
- Selbstassoziation (2)
- Spinchemie (2)
- Strukturaufklärung (2)
- Supramolecular Chemistry (2)
- Transiente Absorption (2)
- Triarylamin (2)
- Triquinacenderivate (2)
- UV/Vis spectroscopy (2)
- Wasserstoffbrückenbindung (2)
- Wirt-Gast-Beziehung (2)
- XNA (2)
- absorption (2)
- acid sphingomyelinase (2)
- annulation (2)
- azulene (2)
- boron (2)
- boronate esters (2)
- cage compounds (2)
- cerebrosides (2)
- charge separation (2)
- charge transfer (2)
- chirality transfer (2)
- click chemistry (2)
- complexation (2)
- cooperativity (2)
- corannulene (2)
- covalent organic frameworks (2)
- crystal engineering (2)
- curved hydrocarbons (2)
- cyclophane (2)
- cyclophanes (2)
- cytotoxic activity (2)
- cytotoxicity (2)
- density functional calculations (2)
- diketopyrrolopyrroles (2)
- dimer (2)
- dynamic covalent chemistry (2)
- electrocatalysis (2)
- epitranscriptomics (2)
- fullerenes (2)
- gekrümmte Kohlenwasserstoffe (2)
- helicenes (2)
- heterogeneous catalysis (2)
- homogenous catalysis (2)
- hydrocarbons (2)
- hydrogen bonding (2)
- intervalence charge transfer (2)
- ligands (2)
- lysosome (2)
- macrocycle (2)
- marine natural product (2)
- mechanism (2)
- nanographene (2)
- naphthalene diimide (2)
- nicht-kovalente Wechselwirkungen (2)
- oligothiophenes (2)
- optical spectroscopy (2)
- organic semiconductors (2)
- organic solar cell (2)
- perylene bisimides (2)
- perylene dyes (2)
- phosphorescence (2)
- polymer-peptide-conjugate (2)
- polymerization (2)
- polymers (2)
- porphyrins (2)
- redox cascade (2)
- renewable fuels (2)
- ribozymes (2)
- ruthenium (2)
- ruthenium bda complexes (2)
- self-sorting (2)
- singlet oxygen (2)
- site-specific RNA cleavage (2)
- solid-state emitters (2)
- solvent effects (2)
- spin chemistry (2)
- squaraine dyes (2)
- stereochemistry (2)
- streptomyces (2)
- supramolecular polymers (2)
- supramolekulare Chemie (2)
- thermodynamics (2)
- thiol-ene (2)
- triplet (2)
- triquinacene derivatives (2)
- two-photon absorption (2)
- two-photon excited fluorescence (2)
- water (2)
- water splitting (2)
- "steepest descent-modest ascent" (1)
- "steilsten Abstieg - schwächste Aufstieg" (1)
- (bi)pyridine-based ligand (1)
- 1,4-Azaborine (1)
- 2"-> (1)
- 2':6' (1)
- 2-photon absorption (1)
- 5'-O-Methyldioncophylline D (1)
- A-D-A dyes (1)
- A. abbreviatus (1)
- A. likoko (1)
- ADME analysis (1)
- AIE (1)
- API (1)
- Absolute Configuration (1)
- Absolute Konfiguration (1)
- Absorption (1)
- Acenes (1)
- Acetylneuraminsäure <N-> (1)
- Actinomyceten (1)
- Actinomycetes (1)
- Adsorption (1)
- Aggregate (1)
- Akzeptor <Chemie> (1)
- Aldehyde Bioconjugation (1)
- Alkaloid (1)
- Alkaloide (1)
- Alkoxylradikale (1)
- Alkoxylradikals (1)
- Alkyltransferase Ribozyme SAMURI (1)
- Alzheimer′s disease (1)
- Aminosäuren (1)
- Amphiphile Verbindungen (1)
- Amplification (1)
- Analysis of RNA Modifications (1)
- Anchimeric assistance in solvolysis (1)
- Ancistrocladus ealaensis (1)
- Ancistrocladus likoko (1)
- Ancistrolikokine E3 (1)
- Anode (1)
- Anti-infectious activity (1)
- Antiausterity activity (1)
- Antimalariamittel (1)
- Antimicrobial activities (1)
- Antimicrobial proteins (1)
- Antimikrobielle Aktivitäten (1)
- Antimikrobieller Wirkstoff (1)
- Antitumor-Antibiotikum (1)
- Antitumor-antibitioc (1)
- Antiviral nucleoside analogues (1)
- Apoptosis (1)
- Arene-Fluoroarene (1)
- Aromatic-hydrocarbon (1)
- Artificial Base Pair (1)
- Aspergillus niger (1)
- Asymmetric synthesis (1)
- Asymmetrische Synthese (1)
- Atomic and molecular interactions with photons (1)
- Atropisomere (1)
- Atropisomerie (1)
- BMP-2 (1)
- BMP-2 delivery (1)
- Bacillus megaterium (1)
- Baltic Sea (1)
- Barbituric Acid Merocyanines (1)
- Base pairing (1)
- Basenpaarung (1)
- Bicyclo[1.1.0]butylcarbinyl sulfonates (1)
- Biochemistry (1)
- Biocompatibility (1)
- Biodegradable polymer scaffolds (1)
- Biomaterial (1)
- Bioorganic chemistry (1)
- Bioorganik (1)
- Bioorthogonal (1)
- Bioorthogonal Tag (1)
- Biradikal (1)
- Bodipy (1)
- Bola-Amphiphil (1)
- Bone morphogenetic protein-2 (1)
- Bone tissue engineering (1)
- Bor (1)
- Bor-Dotierte Aromaten (1)
- Bor-Stickstoff-Verbindungen (1)
- Borane (1)
- Boron-Nitrogen Dative Bond (1)
- Butadien (1)
- C-13 NMR (1)
- CCL2 (MCP-1) (1)
- CD-Spektroskopie (1)
- CD4+ T cells (1)
- CD8+ T cells (1)
- COVID-19 (1)
- CXCL8 (IL-8) (1)
- Caco-2 (1)
- Cage (1)
- Calix[4]aren (1)
- Carbazolderivate (1)
- Carbon (1)
- Carboxylat-Rezeptor (1)
- Catalysis (1)
- Ceramide (1)
- Charge-transfer-Komplexe (1)
- Chemical modification (1)
- Chemische Bindung (1)
- Chemische Reaktion (1)
- Chemosensor (1)
- Chirality Transfer (1)
- Chlorin (1)
- Chlorinderivate (1)
- Chromophore (1)
- Chromophore Assembly (1)
- Chromophores (1)
- Circular Dichroism (1)
- Circular dichroism (1)
- Circular-Dichroismus (1)
- Co-Crystal Structures of Chili RNA (1)
- Computational chemistry (1)
- Computerchemie (1)
- Congo (1)
- Congolese Ancistrocladus plants (1)
- Conjugated polymers (1)
- Coordination Polymer (1)
- Coronaviren (1)
- Covalent Organic Framework (1)
- Crosslinker (1)
- Crosslinking (1)
- Cryoelectron Microscopy (1)
- Cryoelectron microscopy (1)
- Crystal structure of MTR1 (1)
- Cyaninfarbstoff (1)
- Cyclic peptides (1)
- Cyclobutylcarbinyl sulfonates (1)
- Cyclooctine (1)
- Cyclooctyne (1)
- Cyclophan (1)
- Cyclovoltammetrie (1)
- DNA catalysis (1)
- DNA catalyst (1)
- DNA-based nanostructures (1)
- DNA-processing enzymes (1)
- DNA/RNA binding (1)
- DNA/RNA sensors (1)
- DNS-Schädigung (1)
- DOSY-NMR (1)
- Demethylase (1)
- Demethylierung (1)
- Demokratische Republik Kongo (1)
- Deoxyribozyme (1)
- Diamant (1)
- Diarylethen (1)
- Diarylethene (1)
- Diarylethylene (1)
- Dicarboximide (1)
- Dicarboximides (1)
- Dichtebestimmung in Theorie und Experiment (1)
- Dictyota (1)
- Dictyotaceae (1)
- Dihydrooxazole (1)
- Dimer (1)
- Dimer-Konfiguration (1)
- Dimere (1)
- Dimeric Naphthylisoquinoline Alkaloids (1)
- Dimers (1)
- Dioncophylline C (1)
- Donator <Chemie> (1)
- Donor (1)
- Donor-Akzeptor Triaden (1)
- Donor-Photosensibilisator-Akzeptor Triade (1)
- Donor−acceptor dyads (1)
- Drug Delivery System (1)
- Dyad (1)
- Dye (1)
- Dyes/pigments (1)
- Dünnschichttransistor (1)
- EPR (1)
- EPR spectroscopy (1)
- Effectors in plant pathology (1)
- Electron (1)
- Electron Transfer (1)
- Electron demand in ditosylates (1)
- Electron density (1)
- Electron transfer (1)
- Elektrochemie (1)
- Elektronenakzeptor (1)
- Elektronendichte (1)
- Elektronendichtebestimmung (1)
- Elektronenspinresonanzspektroskopie (1)
- Emission (1)
- Energieaufnahme (1)
- Energietransfer <Mikrophysik> (1)
- Energy transfer (1)
- Enzym (1)
- Enzymes (1)
- Enzyminhibitor (1)
- Epitranskriptom (1)
- Eriodictyon californicum (1)
- Excitons (1)
- FT-IR spectroscopy (1)
- Farbstoffe (1)
- Farbstoffe/Pigmente (1)
- Festkörper-NMR (1)
- Festphasensynthese (1)
- Fiels-effect transistors (1)
- Fluorescence and Crosslinking (1)
- Fluoreszenzaktivierung (1)
- Fluoreszenzresonanz-Energietransfer (1)
- Fluoreszenzspektrometer (1)
- Fluoreszenzspektroskopie (1)
- Fluorogenic RNA Aptamers (1)
- Foldamers (1)
- Fulleren-Netzwerk (1)
- Fullerene (1)
- Functional nucleic acids (1)
- Functionalization (1)
- Fungal host response (1)
- Funktionalisierung <Chemie> (1)
- Funktionelle Polymere (1)
- Galectine (1)
- Garcinia biflavonoids (1)
- Gelieren (1)
- Gibbs activation energy (1)
- Glucosyltransferasen (1)
- Glycoengineering (1)
- Glycosyltransferase (1)
- Gold Nanoparticles (1)
- Gold Nanopartikel (1)
- Golgi (1)
- Graphene nanoribbons (1)
- Growth; BMP-2 (1)
- Grün fluoreszierendes Protein (1)
- Guanidiniocarbonylpyrrol (1)
- H-Aggregate (1)
- H-bonds (1)
- H2A histone family member X (H2AX) (1)
- HIV (1)
- HRMS (1)
- Halbleiter (1)
- Hekate (1)
- Helicene (1)
- Helicene diimide (1)
- Helicität <Chemie> (1)
- Helix- and Zick-Zack-Konformere (1)
- Helix- and Zig-Zag-Conformers (1)
- Helix-Coil-Transition (1)
- Helix-Knäuel-Umwandlung (1)
- Heterosolarzelle (1)
- Hexaarylbenzene (1)
- Hexaarylbenzole (1)
- High efficiency (1)
- High performance (1)
- High-Throughput Sequencing Method, DZ-seq (1)
- Higher-order Transient Absorption Spectroscopy (1)
- Host-Guest Chemistry (1)
- Host-Guest-Chemistry (1)
- Hydrogen bond (1)
- Hyperfine coupling constants (1)
- In-vitro (1)
- Indirect and direct contributions to A<sub>iso</sub> (1)
- Influence of excitation classes (1)
- Inhibitor (1)
- Intensity (1)
- Intermolecular Interactions (1)
- Intermolekulare Wechselwirkungen (1)
- Intervalenzladungstransfer (1)
- Iridium-Photosensibilisator (1)
- Iridiumkomplexe (1)
- Isolation (1)
- Isolierung (1)
- Isolierung <Chemie> (1)
- Isomorphe Nukleobasen-Analoga (1)
- J-Aggregat (1)
- J-Aggregate (1)
- J-Aggregates (1)
- J-aggregate (1)
- J-aggregate behavior (1)
- J-aggregates (1)
- Jozimine A2 (1)
- Jurkat cells (1)
- K-region (1)
- K2–K model (1)
- Kinetic Self-assembly (1)
- Kinetik (1)
- Kohlenhydrate (1)
- Kohlenstoff (1)
- Kohn-Sham Orbitale (1)
- Kohn-Sham Orbitals (1)
- Kolloidalstabilität (1)
- Kombinatorische Synthese (1)
- Komplexierung (1)
- Konfiguration <Chemie> (1)
- Konformeren (1)
- Konglomerat (1)
- Kongo (1)
- Kooperativität (1)
- Koordinationspolymer (1)
- Koordinationspolymere (1)
- Kraftfeld (1)
- Kupplungsreaktion (1)
- Käfigverbindungen (1)
- Ladungstrennung (1)
- Lebende Polymerisation (1)
- Lectins (1)
- Leitfähige Polymere (1)
- Lichtabsorption (1)
- Lichtsammelsystem (1)
- Ligand (1)
- Light-emitting diodes (1)
- Lippert–Mataga plot (1)
- Liquid Crystals (1)
- Liquid-crystalline (1)
- Living Polymerisation (1)
- Lower Critical Solution Temperature (LCST) (1)
- MAS (1)
- METTL8 (1)
- MRCI (1)
- Magnetfeldeffekt (1)
- Makrocyclische Verbindungen (1)
- Makrozyklus (1)
- Mandibular continuity defects (1)
- Marcus inverted region (1)
- Marrow stromal cells (1)
- Mechanismus (1)
- Merocyanine dye (1)
- Mesenchymal transition (1)
- Mesogen (1)
- Metabolismus (1)
- Metaheuristik-Suchmethoden (1)
- Metall-Ion (1)
- Metallosupramolecular chemistry (1)
- Methylierung (1)
- Methyltransferase Ribozyme (1)
- Methyltransferase Ribozyme MTR1 (1)
- Michael addition (1)
- Michael-Addition (1)
- Microenvironment (1)
- Mitochondrial Matrix Protein (1)
- Modified Nucleotides in tRNAs (1)
- Molecular dynamics (1)
- Molecular mechanism (1)
- Molecular probes (1)
- Molecular-dynamics (1)
- Molecules (1)
- Molekül (1)
- Moleküldynamik (1)
- Moleküloptimierung (1)
- Moller-Plesset (1)
- Molnupiravir (1)
- Molnupiravir-Induced RNA Mutagenesis Mechanism (1)
- Monoschicht (1)
- Mulliken-Hush (1)
- Multi Reference (1)
- Multibranched structures (1)
- Multireferenz (1)
- N-acetyllactosamine (1)
- N-oleoyl serinol (1)
- N6-methyladenosine (1)
- N6-methyladenosine (m6A) (1)
- NDI-H (1)
- NIQs (1)
- NIR OLED (1)
- NIR chromophore (1)
- NMR spectroscopy (1)
- Nanodiamant (1)
- Nanopartikel (1)
- Nanoribbon (1)
- Nanosegregation (1)
- Nanostructure (1)
- Nanostrukturen (1)
- Naphthalinbisimid (1)
- Naphthochinonen (1)
- Naphthoquinones (1)
- Naphthyl Isoquinolines (1)
- Naphthylisochinoline (1)
- Naphthylisoindolinone alkaloids (1)
- Naphthylisoquinolin (1)
- Naphthylisoquinoline (1)
- Naphthylisoquinoline alkaloids (1)
- Natural Products (1)
- Natural products (1)
- Naturstoffe (1)
- Neisseria (1)
- Nicht-Fulleren Akzeptor (1)
- Non-Fullerene Acceptor (1)
- Non-linear optics (1)
- Nonlinear Optical Properties of Organic Materials (1)
- Nucleic Acids (1)
- Nucleic acids (1)
- Nucleobase Analogue (1)
- Nucleobase Surrogate Incorporation (1)
- Nucleosidanaloga (1)
- Nukleinsäure (1)
- OEG chains (1)
- OFETs (1)
- OLC (1)
- OLED (1)
- Octavalen (1)
- Oligofructoside (1)
- Oligomers and Polymers (1)
- Oligonucleotide (1)
- Onbead-Enzymscreening (1)
- One-photon (1)
- Optical Spectroscopy (1)
- Optical properties (1)
- Optical spectroscopy (1)
- Optimierungsmethoden (1)
- Optimization methods (1)
- Oral squamous cell carcinoma (1)
- Organelles (1)
- Organic Field-Effect Transistor (1)
- Organic field-effect transistor (1)
- Organic semiconductors (1)
- Organische Halbleiter (1)
- PBI cyclophane (1)
- PEDOT (1)
- PI stacking (1)
- PNA (1)
- Pancreatic cancer (1)
- Paracyclophane (1)
- Pathway (1)
- Pentacen (1)
- Peptid-Nucleinsäuren (1)
- Peptidsynthese (1)
- Perovskite (1)
- Perylen-Farbstoffe (1)
- Perylenbisanhydrid (1)
- Perylenbisimiden (1)
- Perylenbisimides (1)
- Perylene Bisimides (1)
- Perylentetracarbonsäurederivate (1)
- Pflanzenzelle (1)
- Pflanzenzellkulturen (1)
- Phaeophyceae (1)
- Phosphoramidite (1)
- Phosphorylase (1)
- Photochemie (1)
- Photochromie (1)
- Photoconductivity (1)
- Photoelektron (1)
- Photoresponsive DNA Crosslinker (1)
- Phytochemical investigations of a Congolese Ancistrocladus Liana (1)
- Phytochemie (1)
- Plant cell cultures (1)
- Polyamin (1)
- Polycarbazole (1)
- Polycyclic aromatic hydrocarbons (1)
- Polymer (1)
- Polymer-drug interaction (1)
- Polymerhalbleiter (1)
- Polymerkomplexe (1)
- Polymerlösung (1)
- Polymers (1)
- Polymorphismus (1)
- Porosität (1)
- Porous Materials (1)
- Porphyrin (1)
- Potential-energy curves (1)
- Protease (1)
- Protein Corona (1)
- Proteinadsorption (1)
- Proteinen mit antimikrobieller Wirkung (1)
- Protonen-NMR-Spektroskopie (1)
- Protonenreduktion (1)
- Pyren (1)
- Pyrenderivate (1)
- QM/MM (1)
- Quadruplex-DNS (1)
- Quality assessment of antimalarial medicines from the Congo (1)
- Quantenchemische Rechnungen (1)
- Quantifizierung (1)
- Quantum Chemical CD Calculations (1)
- Quantum Chemical Calculations (1)
- Quantum mechanics / molecular modeling (1)
- Quasi-Newton-Verfahren (1)
- RAFT (1)
- RNA Aptamer (1)
- RNA G-quadruplex (1)
- RNA Labelling (1)
- RNA Methyltransferase (1)
- RNA Modification (1)
- RNA aptamers (1)
- RNA cleavage (1)
- RNA ligation (1)
- RNA modifications (1)
- RNA splicing (1)
- RNA structures (1)
- RNA-Aptamere (1)
- RNA-Cleaving Deoxyribozymes (1)
- RNA-Dependent RNA Polymerase (1)
- RNA-catalyzed RNA methylation (1)
- RU-(II) complexes (1)
- Radical-ion pair (1)
- Raman (1)
- Raumfüllung (1)
- Rearrangement of carbocations (1)
- Redox-Kaskade (1)
- Redoxkaskade (1)
- Redoxreaktion (1)
- Reduction (1)
- Remdesivir (1)
- Reticular Chemistry (1)
- Ribozym (1)
- Ribozyme (1)
- Ribozyme-catalyzed RNA labeling (1)
- Ribozymes (1)
- Ring closing metathesis (1)
- Ringschlussmetathese (1)
- Rotation (1)
- Ru(II)–Fe(II)–Ru(II) complex (1)
- Ruthenium (1)
- Ruthenium-Photosensibilisator (1)
- Räumliche Anordnung (1)
- Röntgendiffraktometrie (1)
- SARS (1)
- SARS-CoV-2 polymerase (1)
- SARS-CoV2 Replication Impairment (1)
- SELEX (1)
- SERS (1)
- SIB (1)
- SacB (1)
- Scleractinia (1)
- Screening (1)
- Second coordination sphere engineering (1)
- Self-Assembly in Water (1)
- Self-Sortierung (1)
- Sialic acids (1)
- Sialinsäuren (1)
- Simulations (1)
- Single-molecule microscopy (1)
- Sinus floor augmentation (1)
- Site-Specific RNA Cleavage (1)
- Site-specific RNA labelling (1)
- Solid-State NMR Spectroscopy (1)
- Solution-state NMR (1)
- Sonogashira (1)
- Sonogashira-Hagihara-Reaktion (1)
- Space filling (1)
- Spectroscopy (1)
- Speicher <Informatik> (1)
- Spektroelektrochemie (1)
- Spermin (1)
- Spin density (1)
- Spin flip (1)
- Spin labels (1)
- Spin-Sonde (1)
- Spin-chemistry (1)
- Squamous-cell carcinoma (1)
- Squarain Farbstoffe (1)
- Squaraine Dyes (1)
- Sracking (1)
- Stacking (1)
- Staphylococcus aureus (1)
- State (1)
- Stereochemistry (1)
- Stokes-Verschiebung (1)
- Stokes-shifted fluorescence emission (1)
- Streptomyces axinellae (1)
- Structural Biology (1)
- Structural elucidation (1)
- Structure elucidation (1)
- Struktursonden (1)
- Stylissa carteri (1)
- Suc1 (1)
- Supercap (1)
- Superkondensator (1)
- Supramolecular Block Copolymers (1)
- Supramolecular Element (1)
- Supramolecular Interaction (1)
- Supramolecular aggregates (1)
- Supramolecular electronics (1)
- Supramolekulare Aggregate (1)
- Suzuki coupling (1)
- Synthese (1)
- Synthesediamant (1)
- Synthetic Functional RNAs (1)
- Synthetischer Farbstoff (1)
- Systems (1)
- TD-DFT (1)
- TERRA RNA (1)
- Tabusuche (1)
- Targeting (1)
- Taxol (1)
- Terpyridinderivate <2 (1)
- Terrylenbisimid (1)
- Terrylenderivate (1)
- Terrylene bisimide (1)
- Thalassodendron ciliatum (1)
- Theoretical Chemistry (1)
- Theoretische Charakterisierung (1)
- Theoretische Chemie (1)
- Theorie (1)
- Thermodynamics (1)
- Thiophen (1)
- Tiplet emiters (1)
- Tiplett Emitter (1)
- Tolane-Modified Fluorescent Nucleosides (1)
- Total Synthesis (1)
- Totalsynthese (1)
- Triad (1)
- Triplett (1)
- Tumorigenicity (1)
- Two-photon absorption (1)
- UV-VIS-Spektroskopie (1)
- UV/Vis-Absorption (1)
- Ultrafast spectroscopy (1)
- Vergleich (1)
- Vesikel (1)
- Vibronic contributions (1)
- Wasserlösliche Polymere (1)
- Wasseroxidationsreaktion (1)
- Wasserspaltung (1)
- Wasserstoffbrücken (1)
- Water (1)
- Water Oxidation (1)
- Wirkmechanismus (1)
- Wirkstoff-Träger-System (1)
- Wirt-Gast-Komplex-Chemie (1)
- X-Ray Diffraction (1)
- X-ray Crystallography (1)
- X-ray diffraction (1)
- XRPD (1)
- Xanthin (1)
- YTH reader proteins (1)
- Zelladhäsion (1)
- Zellkultur (1)
- Zinc Chlorin (1)
- Zink (1)
- Zinkchlorine (1)
- Zweidimensionale NMR-Spektroskopie (1)
- Zweiphotonenabsorption (1)
- [7]helicene (1)
- [FeFe] hydrogenase mimic (1)
- [FeFe]-Hydrogenase Imitator (1)
- [n]helicenes (1)
- \(\alpha\)-phase (1)
- \(\beta\)-phase (1)
- \(^{1}\)H-\(^{13}\)C HETCOR (1)
- abietane (1)
- acceptor (1)
- activating transcription factor 4 (ATF4) (1)
- adsorption (1)
- aelf-assembly (1)
- alkaloids (1)
- alkaloids-Quinoid (1)
- alkene-alkyne [2+2] photocycloaddition (1)
- amodiaquine (1)
- amphiphilic dyes (1)
- amplification (1)
- ancistrocladinium A (1)
- angeregte Zustände (1)
- annihilation (1)
- anti-cancer-agent (1)
- anti-depressant drug (1)
- anti-trypanosomal (1)
- antibacterial activity (1)
- antidepressants (1)
- antimicrobials (1)
- aqua material (1)
- aqueous medium (1)
- arene-fluoroarene (1)
- arenes (1)
- aromatic compounds (1)
- artemether - lumefantrine (1)
- artificial base pair (1)
- association (1)
- ataxia teleagiectasia mutated (ATM) (1)
- atomic mutagenesis (1)
- atropisomer (1)
- aza[7]helicene (1)
- azaborole (1)
- azaphilone (1)
- azido-ceramides (1)
- bacterial infection (1)
- bartalinia robillardoides (1)
- biflavanoids (1)
- bile salt (1)
- bioactive compound (1)
- bioactivities (1)
- biocatalysis (1)
- biocompatibility (1)
- biological techniques (1)
- biomass (1)
- bioorthogonal SAM analogue ProSeDMA (1)
- bioorthogonal metabolic glycoengineering; click chemistry; sialic acid (1)
- biophysical investigation (1)
- biosynthesis (1)
- biradical (1)
- bis-terpyridyl ligands (1)
- bola-amphiphile (1)
- boric acid (1)
- boronateesters (1)
- borylation (1)
- brown seaweeds (1)
- bulk-heterojunction solar cells (1)
- calix[4]arene (1)
- capillary zone electrophoresis (1)
- carbohydrate chemistry (1)
- carbon (1)
- carboxylate receptor (1)
- carrier transport (1)
- cascade reactions (1)
- catalyst (1)
- catalyst synthesis (1)
- catalysts (1)
- catalytic (1)
- catalytic DNA (1)
- catalytic activity (1)
- catalytic mechanisms (1)
- cell membrane model (1)
- cellular stress response (1)
- ceramidase (1)
- ceramide analogs (1)
- cerebroside (1)
- ceriops decandra (1)
- charge recombination (1)
- charge transport (1)
- charge transport; hydrogen bonding; oligothiophene; organogel; self-assembly (1)
- charge-separated state (1)
- chemical modification (1)
- chiral resolution (1)
- chlorin (1)
- circular polarized luminescence (1)
- circularly polarized luminescence (1)
- co-aggregation (1)
- cocrystallization (1)
- colloid (1)
- columnar phases (1)
- complexity (1)
- computational chemistry (1)
- configurational stability (1)
- conformational search (1)
- conjugated molecule (1)
- conjugation (1)
- cooperative (1)
- cooperative self-assembly (1)
- coordination chemistry (1)
- coordination isomerism (1)
- coordination oligomer (1)
- coordination oligomers (1)
- coordination polymer (1)
- covalent and site-specific RNA labeling (1)
- covalent organic framework (1)
- cristal engeneering (1)
- crystalline (1)
- crystals (1)
- curcumin (1)
- curvature (1)
- curved π-systems (1)
- cyclic perylene bisimide (1)
- cyclic trimer (1)
- cyclic voltammetry (1)
- cyclische Trimere (1)
- cyclodehydrogenation (1)
- cylindrical micelles (1)
- cysteine protease (1)
- cytoplasm (1)
- decandrinin (1)
- demethylase enzymes FTO and ALKBH5 (1)
- deracemization (1)
- di-\(\pi\)-methane rearrangement (1)
- diamond (1)
- dibenzosemibullvalenes (1)
- dicarboximide (1)
- differential scanning calorimetry (1)
- diffusion (1)
- dimerer Naphthylisochinolin-Alkaloide (1)
- dimerization (1)
- dimers (1)
- dinuclear (1)
- dipolar aggregation (1)
- dipole-dipole interaction (1)
- discotic liquid crystals (1)
- discovery (1)
- dissolution rates (1)
- disulfide bonds (1)
- docking (1)
- docking studies (1)
- domain shift (1)
- donor-acceptor dyad (1)
- donor-acceptor dyads (1)
- donor-acceptor interactions (1)
- donor-acceptor triads (1)
- donor-photosensibilisator-acceptor triad (1)
- donor–acceptor (1)
- donor–acceptor dyads (1)
- drug delivery (1)
- drugs (1)
- duplex structure (1)
- dyad (1)
- dyads (1)
- dye (1)
- dye assembly (1)
- dye chemistry (1)
- electrodes (1)
- electron density (1)
- electronic and spintronic devices (1)
- electronic collective variables (1)
- electronic devices (1)
- electronic structure (1)
- electronic wavefunction (1)
- emission (1)
- enantiomerization (1)
- enantiomers (1)
- encapsulation (1)
- energy transfer dynamics (1)
- enzyme (1)
- enzyme engineering (1)
- enzyme purification (1)
- enzyme structure (1)
- enzymes (1)
- ergosterol derivative (1)
- ethenoanthracenes (1)
- excimer (1)
- excimer formation (1)
- excited states (1)
- exciton dynamics (1)
- excitonic chirality (1)
- experimental and theoretical determination of electron density (1)
- extractives (1)
- ferroelectrics (1)
- films (1)
- flavenoids (1)
- flavonoids (1)
- flourescence quantum yield (1)
- fluerescence (1)
- fluorenscence (1)
- fluorescence resonance energy transfer (1)
- fluorescence spectroscopy (1)
- fluorescent (1)
- fluorescent probes (1)
- fluorescent protein (1)
- fluorescent resonance energy transfer (1)
- fluorogen-activating RNA aptamer (FLAP) (1)
- fluoxetine (1)
- flux (1)
- folda-dimer (1)
- folded macrocyles (1)
- folding (1)
- folding landscapes (1)
- force field (1)
- fullerene network (1)
- functional dyes (1)
- functionalization (1)
- galectin-1 (1)
- global minimum (1)
- glycocalyx (1)
- glycosphingolipids (1)
- gold (1)
- growth (1)
- guanidiniocarbonyl pyrrole (1)
- guttiferae (1)
- hMSC-TERT (1)
- halbleitende Polymere (1)
- halichondria panicea (1)
- heavy metals (1)
- helicene (1)
- helicenocyanine (1)
- heterocycles (1)
- hexaarylbenzenes (1)
- hexakisadducts (1)
- high-temperature NMR (1)
- homochiral dimer (1)
- host-guest (1)
- host-guest chemistry (1)
- host-guest systems (1)
- hybrid materials (1)
- hydrazone (1)
- hydrogel (1)
- hydrogen bond (1)
- hydrogen peroxide (1)
- hydroxylation (1)
- imaging (1)
- imidization (1)
- imines (1)
- impurity profiling (1)
- in vitro Selection (1)
- in vitro selection from a structured RNA library (1)
- induced phase transition (1)
- inflammation (1)
- inherent chirality (1)
- inhibitor (1)
- intermolecular applications of ribozymes (1)
- intersystem crossing (1)
- intervalence charge-transfer (1)
- intrinsic free space (1)
- invasion (1)
- inflammatory response (1)
- ion pairing (1)
- iridium complex (1)
- iridium photosensitizer (1)
- iron oxide nanoparticles (1)
- isomorphic nucleobase analog (1)
- isotropic hyper fine coupling (1)
- key structure - fluorescence activation relationships (SFARs) (1)
- ladungsgetrennte Zustände (1)
- large Stokes shift (1)
- large stokes shift (1)
- laser (1)
- lectin (1)
- ligand binding (1)
- light harvesting (1)
- light-induced interstrand DNA crosslinking (1)
- liposome (1)
- liquid crystal alignment (1)
- liquid crystal (1)
- livingstonei (1)
- low-valent compounds (1)
- luminescent solar concentrators (1)
- magnetic field effect (1)
- major depression (1)
- marine bacteria (1)
- marine fungi (1)
- marine macroalgae (1)
- marine natural products (1)
- marine sponge (1)
- materials (1)
- materials design (1)
- measles (1)
- merocyanine (1)
- merocyanine dye (1)
- merocyanine dyes/pigments (1)
- mesogens (1)
- metabolic analysis (1)
- metabolic glycoengineering (1)
- metabolism (1)
- metadynamics (1)
- metaheuristic methods (1)
- metal complexenes (1)
- metal-ion-ligand coordination (1)
- metal-to-ligand charge transfer (MLCT) (1)
- metallomacrocycles (1)
- metallosupramolecular π-amphiphiles (1)
- methyl viologen (1)
- methyltransferase (1)
- micelles (1)
- microbiology (1)
- microbiology techniques (1)
- microscopy (1)
- microtubes (1)
- migration (1)
- minimal inhibitory concentration (1)
- mobility (1)
- mode of action (1)
- modified RNA nucleotides (1)
- modified monosaccharides (1)
- modified nucleosides (1)
- molecular (1)
- molecular capsules (1)
- molecular dynamics (1)
- molecular recognition (1)
- molecules (1)
- molekulare Erkennung (1)
- multichromophoric arrays (1)
- multiflora (1)
- multimetallic complexes (1)
- multiple helicene PAHs (1)
- multiple myeloma (1)
- n-type semiconductors (1)
- nanomaterials (1)
- nanoparticles (1)
- nanorods and nanosheets (1)
- nanoscale imaging (1)
- nanosegregation (1)
- nanotube (1)
- naphthylisoquinoline alkaloid (1)
- narrow bandwidth (1)
- natural products (1)
- near infrared chirality (1)
- near infrared emitter (1)
- near-IR chromophores (1)
- near-infrared sensitivity (1)
- neutral polyradical (1)
- neutrales Polyradikal (1)
- non-fullerene acceptor (1)
- non-fullerene acceptors (1)
- noncovalent interactions (1)
- nonfullerene acceptors (1)
- nucleation elongation (1)
- nucleation-elongation (1)
- nucleation-elongation model (1)
- nucleic acid (1)
- nucleic acids (1)
- nucleoside modification recognition (1)
- null-aggregate (1)
- obstructive pulmonary disease (1)
- oligo(phenylene ethynylene) (OPE) (1)
- oligomers (1)
- oligothiophene (1)
- on surface self-assembly (1)
- onbead enzym screening (1)
- optical materials (1)
- optical properties (1)
- optics (1)
- optische Eigenschaften (1)
- organic semiconductors (1)
- organic compounds (1)
- organic light emitting diodes (1)
- organic photovoltaics (1)
- organic semiconductor (1)
- organic transistor (1)
- organische Photovoltaik (1)
- organische Solarzellen (1)
- organischer Feldeffekttransistor (1)
- organischer Transitor (1)
- organization (1)
- organogelator (1)
- orylation (1)
- oxidation (1)
- oxygen reduction reaction (1)
- p-conjugated systems (1)
- pancreatic cancer (1)
- parallel polar dimers (1)
- pentaketide (1)
- peptide backbone (1)
- perylene (1)
- perylene bisimide dimers (1)
- perylene bisimide dyes (1)
- perylene bisimide hydrogels (1)
- perylene bismide dye (1)
- perylene imide (1)
- perylenebisimide (1)
- perylenebisimide dyes (1)
- phenazine (1)
- phenylboronate (1)
- phosphodiesterase-4 inhibitor (1)
- photochemical (1)
- photoconductive interlayer (1)
- photoinduzierter Elektronentransfer (1)
- photoluminescence (1)
- photophysics (1)
- photoresponsive behavior (1)
- photosenitizers (1)
- photosensitization (1)
- phthalocyanines (1)
- pi-pi Wechselwirkungen (1)
- pi-pi- stacking (1)
- platinum complexes (1)
- pol(2-oxazoline) (1)
- polar solution (1)
- polare Lösung (1)
- polarizing optical microscopy (1)
- poly(2-oxazine) (1)
- poly(2-oxazoline)s (1)
- polyamine (1)
- polycarbazole (1)
- polycycles (1)
- polycyclic aromatic hydrocarbon (1)
- polyglycidol (1)
- polymer drug interaction (1)
- polymorphism (1)
- polyoxazolines (1)
- polypyridyl complexes (1)
- porous materials (1)
- porousmaterials (1)
- position-specific installation of m1A in RNA (1)
- probes (1)
- protease (1)
- protease inhibition (1)
- proteasome inhibitor resistance (1)
- proteasome subunit beta type-5 (PSMB5) (1)
- protein adsorption (1)
- protein crystallography (1)
- protein-ligand-interaction (1)
- proton reduction (1)
- push–pull thienylthiazole (1)
- pyrene (1)
- quantenchemische Berechnungen (1)
- quantum chemical analysis (1)
- quantum optics (1)
- quaterrylene bisimide (1)
- quercetin (1)
- rBAM2-labeled RNA strands (1)
- racemization (1)
- radical (1)
- radical anion (1)
- radical ion pair (1)
- reabsorption (1)
- real-time NMR spectroscopy (1)
- recombinant proteins (1)
- redox (1)
- regulatory T cells (1)
- regulatory T cells (Treg) (1)
- renew-able fuels (1)
- resveratrol (1)
- rhizophoraceae (1)
- rigidification (1)
- ring opening polymerisation (1)
- ring-opening polymerization (1)
- rofumilast (1)
- room-temperature phosphorescence (RTP) (1)
- rotation (1)
- rotational diffusion (1)
- ruthenium catalysts (1)
- ruthenium photosensitizer (1)
- sSupramolecular interaction (1)
- scanning probe microscopy (1)
- seagrass (1)
- seco-NIQs-Naphthylisoindolinone (1)
- selbst organisierende Monolagen (SAM) (1)
- selbstaggregierten (1)
- self-assembled monolayer (SAM) (1)
- semiconducting polymers (1)
- separation techniques (1)
- shape-amphiphiles (1)
- short-range JCT-coupling (1)
- short-range order (1)
- sialic acids (1)
- simulated intestinal fluid (1)
- single crystal structure (1)
- site-specific RNA labeling (1)
- social self‐sorting (1)
- solar cells (1)
- solar fuels (1)
- solid-state NMR (1)
- solid-state NMR spectroscopy (1)
- solid-state emitter (1)
- solid‐state emission (1)
- solubility (1)
- solvatochromism (1)
- solvolysis of (1)
- spacer-controlled self-assembly (1)
- spectroscopic analysis (1)
- spermine (1)
- sphingolipid expansion microscopy (1)
- sphingomyelinase (1)
- sphingosine (1)
- sphingosine 1-phosphate (1)
- sphingosine kinases (1)
- spin relaxation (1)
- squaraine polymer (1)
- stability (1)
- star-shaped compounds (1)
- starazine (1)
- starphene analogue (1)
- stereospecific sythesis (1)
- sterubin (1)
- stokes shift (1)
- structural biology (1)
- structural changes (1)
- structural dynamics (1)
- structural elucidation (1)
- structural restriction (1)
- structure probes (1)
- structure probing (1)
- structure–function relation (1)
- structure–property relation (1)
- subphthalocyanine (1)
- substandard and falsified medicines from the Congo (1)
- sucrose phosphorylase (1)
- superparamagnetism (1)
- superstructure (1)
- supramolecular (1)
- supramolecular assembly (1)
- supramolecular folding (1)
- supramolecular materials (1)
- supramolecular polymerization (1)
- supramolekular (1)
- supramolekularen Elektronik (1)
- surface interactions (1)
- survival (1)
- sustainable energy source (1)
- swallow-tail (1)
- synthesis (1)
- systems (1)
- template catalysis (1)
- tenofovir (1)
- tethya aurantium (1)
- tetracoordinated boron (1)
- tetromycin (1)
- theoretical characterisation (1)
- theoretical investigations (1)
- theoretische Untersuchungen (1)
- theranostics (1)
- thin film transistor (1)
- thin-film transistors (1)
- time-resolved impulsive stimulated raman spectroscopy (1)
- tissue engineering (1)
- topological analysis (1)
- topologische Analyse (1)
- trans-acting 2'-5' adenylyl transferase ribozymes (1)
- transiente Absorption (1)
- transiente Absorptionsspektroskopie (1)
- triaryalmine (1)
- triarylborane (1)
- trinuclear (1)
- triplet sensitization (1)
- two-dimensional nanostructures (1)
- umbrella-shaped mesogens (1)
- upconversion (1)
- upramolecular polymerization process (1)
- vacuum processable (1)
- vesicle (1)
- vibrational coherence (1)
- viral epidemiology (1)
- viral infection (1)
- water oxidation catalysis (1)
- water oxidation reation (1)
- xanthine (1)
- zooxanthellae (1)
- zyklische Peptide (1)
- π-conjugated systems (1)
- π-extension (1)
- π-π-interactions (1)
- π–π Stacking (1)
Institute
- Institut für Organische Chemie (374) (remove)
Schriftenreihe
Sonstige beteiligte Institutionen
- International Max Planck Research School Molecular Biology, University of Göttingen, Germany (2)
- Agricultural Center, BASF SE, 67117 Limburgerhof, Germany (1)
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany (1)
- Center for Nanosystems Chemistry (1)
- Center for Nanosystems Chemistry (CNC), University of Würzburg (1)
- Center for Nanosystems Chemistry (CNC), Universität Würzburg, Am Hubland, 97074 Würzburg, Germany (1)
- Charles University, Faculty of Mathematics and Physics, Ke Karlovu 5, 121 16 Prague, Czech Republic (1)
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells, Göttingen (1)
- Department of Cellular Biochemistry, University Medical Center Göttingen (1)
- Department of Cellular Biochemistry, University Medical Centre Göttingen (1)
- Department of Molecular Biology, University Medical Center Göttingen, Germany (1)
- Department of Molecular Biology, University Medical Centre Göttingen (1)
- Department of Molecular Biology, University Medical Centre Göttingen, Göttingen 37073, Germany (1)
- Georg August University School of Science (1)
- Göttingen Center for Molecular Biosciences, Georg- August University Göttingen, Göttingen 37077, Germany (1)
- Göttingen Center for Molecular Biosciences, University of Göttingen (1)
- Helmholtz Institute for RNA-based Infection Biology (HIRI), Josef-Schneider-Straße 2/D15, DE-97080 Wuerzburg, Germany (1)
- Institut für Molekulare Infektionsbiologie (MIB) der Universität Würzburg (1)
- Institute of Cancer Research (ICR) London (1)
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck, CMBI, Leopold-Franzens University Innsbruck, Austria (1)
- Max Planck Institute for Biophysical Chemistry (1)
- Max Planck Institute for Biophysical Chemistry, Am Faßberg 11, DE-37077 Goetingen, Germany (1)
- Max Planck Institute for Biophysical Chemistry, Department of Molecular Biology, Göttingen (1)
- Max Planck Institute for Biophysical Chemistry, Research Group Structure and Function of Molecular Machines, Göttingen (1)
- Max-Planck Institute for Biophysical Chemistry, Department of Molecular Biology, Göttingen (1)
- Novartis Pharma AG, Lichtstrasse 35, CH-4056 Basel, Switzerland (1)
- University Medical Center Göttingen, Department of Cellular Biochemistry, Göttingen (1)
Within this PhD thesis, starting from simple alkene precursors a series of novel boron-doped PAHs were successfully in a sequential one-pot synthetic approach, comprising a hydroboration/borylation cascade as the key step. By applying different postsynthetic reactions, the properties of these boron-doped PAHs were further adjusted, aiming for appealing packing motifs, strong electron-acceptors, and NIR-emitters. The thesis thereby focussed on the synthesis of tailor-made molecules, the investigation of their optical and electronic properties and the discussion on the influence of various factors, e.g. doping pattern, size, shape, and substituents, on these properties.
This thesis focusses on the synthesis of functional chiral molecules using carbo- or hetero[7]helicenes as a chiral element, combined with multiple helicenes, phthalocyanines, and 1,4-azaborine units. The objective is to achieve properties that surpass those of the parent compounds.
In the first project, an enantiopure, propeller-shaped multi-helicene polycyclic aromatic hydrocarbon containing three (P)-[7]helicene units and three (M)-[5]helicene units was stereospecifically synthesized and can be obtained in gram quantities. Leveraging the configurational stability of [7]helicene and the configurational instability of [5]helicene, we exclusively obtained the most thermodynamically stable enantiomer out of 10 possible enantiomeric pairs. The effects of the multi-helicene structure on optical rotation, UVVis absorption, fluorescence, and electronic circular dichroism (CD) spectroscopy were investigated.1
Building on the success of the first project, the second project used the configurationally stable [7]helicene again. Zinc-[7]helicenocyanine (Zn-7HPc) was stereospecifically synthesized by directly conjugating [7]helicenes with a phthalocyanine (Pc) core. Zn-7HPc demonstrates a CD signal in the near-infrared region, indicating efficient chirality transfer from the helicenes to the Pc core. Zn-7HPc forms stable, discrete homochiral dimers over a wide range of concentrations in tetrahydrofuran and dimethyl sulfoxide, as well as in the solid state. These homochiral dimers are formed even within the racemic mixture due to the interlocking of two homochiral monomers. The large comproportionation constant and the observed intervalence charge transfer band that appeared in spectroelectrochemistry experiments indicate strong communication between the two Pc monomers in the dimer.2
In the third project, aza[7]helicenes were incorporated with a 1,4-azaborine unit, which exhibits a multiple-resonance effect, to achieve narrow-band emission, high fluorescence quantum yield (FL), and a small Stokes shift. These properties are essential for ultrahigh-definition organic light-emitting diodes that emit circularly polarized light (CP-OLEDs). The synthesized series of molecules demonstrate small Stokes shifts (0.06–0.07 eV), exceptionally narrow fluorescence and circularly polarized luminescence bands with small full width at half maximum (FWHM, 17–28 nm, 0.07–0.13 eV), and high FL (72–85%).3
In conclusion, the synthesis of functional chiral molecules based on carbo- or hetero[7]helicenes was successfully achieved. The efficient synthetic strategies and improved properties of these molecules provide valuable insights for further investigations into helicenes with advanced structures and enhanced properties.
Oligophenyleneethynylenes (OPEs) are prominent building blocks with exciting optical and supramolecular properties. However, their generally small spectroscopic changes upon aggregation make the analysis of their self-assembly challenging, especially in the absence of additional hydrogen bonds. Herein, by investigating a series of OPEs of increasing size, we have unravelled the role of the conjugation length on the self-assembly properties of OPEs.
Single-layer transition metal dichalcogenides are at the center of an ever increasing research effort both in terms of fundamental physics and applications. Exciton–phonon coupling plays a key role in determining the (opto)electronic properties of these materials. However, the exciton–phonon coupling strength has not been measured at room temperature. Here, we use two-dimensional micro-spectroscopy to determine exciton–phonon coupling of single-layer MoSe2. We detect beating signals as a function of waiting time induced by the coupling between A excitons and A′1 optical phonons. Analysis of beating maps combined with simulations provides the exciton–phonon coupling. We get a Huang–Rhys factor ~1, larger than in most other inorganic semiconductor nanostructures. Our technique offers a unique tool to measure exciton–phonon coupling also in other heterogeneous semiconducting systems, with a spatial resolution ~260 nm, and provides design-relevant parameters for the development of optoelectronic devices.
We exploited the inherent geometrical isomerism of a PtII complex as a new tool to control supramolecular assembly processes. UV irradiation and careful selection of solvent, temperature, and concentration leads to tunable coordination isomerism, which in turn allows fully reversible switching between two distinct aggregate species (1D fibers↔2D lamellae) with different photoresponsive behavior. Our findings not only broaden the scope of coordination isomerism, but also open up exciting possibilities for the development of novel stimuli-responsive nanomaterials.
Temperature-responsive luminescent solar concentrators (LSCs) have been fabricated in which the Förster resonance energy transfer (FRET) between a donor–acceptor pair in a liquid crystalline solvent can be tuned. At room temperatures, the perylene bisimide (PBI) acceptor is aggregated and FRET is inactive; while after heating to a temperature above the isotropic phase of the liquid crystal solvent, the acceptor PBI completely dissolves and FRET is activated. This unusual temperature control over FRET was used to design a color-tunable LSC. The device has been shown to be highly stable towards consecutive heating and cooling cycles, making it an appealing device for harvesting otherwise unused solar energy.
Despite significant progress in the synthesis of covalent organic frameworks (COFs), reports on the precise construction of template-free nano- and microstructures of such materials have been rare. In the quest for dye-containing porous materials, a novel conjugated framework DPP-TAPP-COF with an enhanced absorption capability up to λ=800 nm has been synthesized by utilizing reversible imine condensations between 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (TAPP) and a diketopyrrolopyrrole (DPP) dialdehyde derivative. Surprisingly, the obtained COF exhibited spontaneous aggregation into hollow microtubular assemblies with outer and inner tube diameters of around 300 and 90 nm, respectively. A detailed mechanistic investigation revealed the time-dependent transformation of initial sheet-like agglomerates into the tubular microstructures.
Activating delayed fluorescence emission in a dilute solution via a non-covalent approach is a formidable challenge. In this report, we propose a strategy for efficient delayed fluorescence generation in dilute solution using a non-covalent approach via supramolecularly engineered cyclophane-based nanoenvironments that provide sufficient binding strength to π-conjugated guests and that can stabilize triplet excitons by reducing vibrational dissipation and lowering the singlet–triplet energy gap for efficient delayed fluorescence emission. Toward this goal, a novel biphenyl bisimide-derived cyclophane is introduced as an electron-deficient and efficient triplet-generating host. Upon encapsulation of various carbazole-derived guests inside the nanocavity of this cyclophane, emissive charge transfer (CT) states close to the triplet energy level of the biphenyl bisimide are generated. The experimental results of host–guest studies manifest high association constants up to 10\(^4\) M\(^{–1}\) as the prerequisite for inclusion complex formation, the generation of emissive CT states, and triplet-state stabilization in a diluted solution state. By means of different carbazole guest molecules, we could realize tunable delayed fluorescence emission in this carbazole-encapsulated biphenyl bisimide cyclophane in methylcyclohexane/carbon tetrachloride solutions with a quantum yield (QY) of up to 15.6%. Crystal structure analyses and solid-state photophysical studies validate the conclusions from our solution studies and provide insights into the delayed fluorescence emission mechanism.
Water‐soluble cationic perylene diimide dyes as stable photocatalysts for H\(_2\)O\(_2\) evolution
(2023)
Photocatalytic generation of hydrogen peroxide, H\(_2\)O\(_2\), has gained increasing attention in recent years, with applications ranging from solar energy conversion to biophysical research. While semiconducting solid‐state materials are normally regarded as the workhorse for photogeneration of H\(_2\)O\(_2\), an intriguing alternative for on‐demand H\(_2\)O\(_2\) is the use of photocatalytic organic dyes. Herein we report the use of water‐soluble dyes based on perylene diimide molecules which behave as true molecular catalysts for the light‐induced conversion of dissolved oxygen to hydrogen peroxide. In particular, we address how to obtain visible‐light photocatalysts which are stable with respect to aggregation and photochemical degradation. We report on the factors affecting efficiency and stability, including variable electron donors, oxygen partial pressure, pH, and molecular catalyst structure. The result is a perylene diimide derivative with unprecedented peroxide evolution performance using a broad range of organic donor molecules and operating in a wide pH range.
A new Ru oligomer of formula {[Ru-\(^{II}\)(bda-\(\kappa\)-N\(^2\)O\(^2\))(4,4'-bpy)]\(_{10}\)(4,4'-bpy)}, 10 (bda is [2,2'-bipyridine]-6,6'-dicarbox-ylate and 4,4'-bpy is 4,4'-bipyridine), was synthesized and thoroughly characterized with spectroscopic, X-ray, and electrochemical techniques. This oligomer exhibits strong affinity for graphitic materials through CH-\(\pi\) interactions and thus easily anchors on multiwalled carbon nanotubes (CNT), generating the molecular hybrid material 10@CNT. The latter acts as a water oxidation catalyst and converts to a new species, 10'(H\(_2\)O)\(_2\)@CNT, during the electrochemical oxygen evolution process involving solvation and ligand reorganization facilitated by the interactions of molecular Ru catalyst and the surface. This heterogeneous system has been shown to be a powerful and robust molecular hybrid anode for electrocatalytic water oxidation into molecular oxygen, achieving current densities in the range of 200 mA/cm\(^2\) at pH 7 under an applied potential of 1.45 V vs NHE. The remarkable long-term stability of this hybrid material during turnover is rationalized based on the supramolecular interaction of the catalyst with the graphitic surface.
Despite their popularity as enzyme engineering targets structural information about Sucrose Phosphorylases remains scarce. We recently clarified that the Q345F variant of Bifidobacterium adolescentis Sucrose Phosphorylase is able to accept large polyphenolic substrates like resveratrol via a domain shift. Here we present a crystal structure of this variant in a conformation suitable for the accommodation of the donor substrate sucrose in excellent agreement with the wild type structure. Remarkably, this conformation does not feature the previously observed domain shift which is therefore reversible and part of a dynamic process rather than a static phenomenon. This crystallographic snapshot completes our understanding of the catalytic cycle of this useful variant and will allow for a more rational design of further generations of Sucrose Phosphorylase variants.
The precise interplay between the mRNA codon and the tRNA anticodon is crucial for ensuring efficient and accurate translation by the ribosome. The insertion of RNA nucleobase derivatives in the mRNA allowed us to modulate the stability of the codon-anticodon interaction in the decoding site of bacterial and eukaryotic ribosomes, allowing an in-depth analysis of codon recognition. We found the hydrogen bond between the N1 of purines and the N3 of pyrimidines to be sufficient for decoding of the first two codon nucleotides, whereas adequate stacking between the RNA bases is critical at the wobble position. Inosine, found in eukaryotic mRNAs, is an important example of destabilization of the codon-anticodon interaction. Whereas single inosines are efficiently translated, multiple inosines, e.g., in the serotonin receptor 5-HT2C mRNA, inhibit translation. Thus, our results indicate that despite the robustness of the decoding process, its tolerance toward the weakening of codon-anticodon interactions is limited.
Self-assembly of multi-stranded perylene dye J-aggregates in columnar liquid-crystalline phases
(2018)
Many discoid dyes self-assemble into columnar liquid-crystalline (LC) phases with packing arrangements that are undesired for photonic applications due to H-type exciton coupling. Here, we report a series of crystalline and LC perylene bisimides (PBIs) self-assembling into single or multi-stranded (two, three, and four strands) aggregates with predominant J-type exciton coupling. These differences in the supramolecular packing and optical properties are achieved by molecular design variations of tetra-bay phenoxy-dendronized PBIs with two N–H groups at the imide positions. The self-assembly is driven by hydrogen bonding, slipped π–π stacking, nanosegregation, and steric requirements of the peripheral building blocks. We could determine the impact of the packing motifs on the spectroscopic properties and demonstrate different J- and H-type coupling contributions between the chromophores. Our findings on structure–property relationships and strong J-couplings in bulk LC materials open a new avenue in the molecular engineering of PBI J-aggregates with prospective applications in photonics.
Understanding relationships between microstructure and electrical transport is an important goal for the materials science of organic semiconductors. Combining high-resolution surface potential mapping by scanning Kelvin probe microscopy (SKPM) with systematic field effect transport measurements, we show that step edges can trap electrons on the surfaces of single crystal organic semiconductors. n-type organic semiconductor crystals exhibiting positive step edge surface potentials display threshold voltages that increase and carrier mobilities that decrease with increasing step density, characteristic of trapping, whereas crystals that do not have positive step edge surface potentials do not have strongly step density dependent transport. A device model and microelectrostatics calculations suggest that trapping can be intrinsic to step edges for crystals of molecules with polar substituents. The results provide a unique example of a specific microstructure–charge trapping relationship and highlight the utility of surface potential imaging in combination with transport measurements as a productive strategy for uncovering microscopic structure–property relationships in organic semiconductors.
Natural light harvesting as well as optoelectronic and photovoltaic devices depend on efficient transport of energy following photoexcitation. Using common spectroscopic methods, however, it is challenging to discriminate one-exciton dynamics from multi-exciton interactions that arise when more than one excitation is present in the system. Here we introduce a coherent two-dimensional spectroscopic method that provides a signal only in case that the presence of one exciton influences the behavior of another one. Exemplarily, we monitor exciton diffusion by annihilation in a perylene bisimide-based J-aggregate. We determine quantitatively the exciton diffusion constant from exciton–exciton-interaction 2D spectra and reconstruct the annihilation-free dynamics for large pump powers. The latter enables for ultrafast spectroscopy at much higher intensities than conventionally possible and thus improves signal-to-noise ratios for multichromophore systems; the former recovers spatio–temporal dynamics for a broad range of phenomena in which exciton interactions are present.
AbstractWater oxidation catalysis is a key step for sustainable fuel production by water splitting into hydrogen and oxygen. The synthesis of a novel coordination oligomer based on four Ru(bda) (bda = 2,2′‐bipyridine‐6,6′‐dicarboxylate) centers, three 4,4′‐bipyridine (4,4′‐bpy) linkers, and two 4‐picoline (4‐pic) end caps is reported. The monodispersity of this tetranuclear compound is characterized by NMR techniques. Heterogeneous electrochemical water oxidation after immobilization on multi‐walled carbon nanotubes (MWCNTs) shows catalytic performance unprecedented for this compound class, with a turnover frequency (TOF) of 133 s\(^{−1}\) and a turnover number (TON) of 4.89 × 10\(^6\), at a current density of 43.8 mA cm\(^{−2}\) and a potential of 1.45 V versus normal hydrogen electrode (NHE).
The N,C-coupled naphthylisoquinoline alkaloid ancistrocladinium A belongs to a novel class of natural products with potent antiprotozoal activity. Its effects on tumor cells, however, have not yet been explored. We demonstrate the antitumor activity of ancistrocladinium A in multiple myeloma (MM), a yet incurable blood cancer that represents a model disease for adaptation to proteotoxic stress. Viability assays showed a potent apoptosis-inducing effect of ancistrocladinium A in MM cell lines, including those with proteasome inhibitor (PI) resistance, and in primary MM cells, but not in non-malignant blood cells. Concomitant treatment with the PI carfilzomib or the histone deacetylase inhibitor panobinostat strongly enhanced the ancistrocladinium A-induced apoptosis. Mass spectrometry with biotinylated ancistrocladinium A revealed significant enrichment of RNA-splicing-associated proteins. Affected RNA-splicing-associated pathways included genes involved in proteotoxic stress response, such as PSMB5-associated genes and the heat shock proteins HSP90 and HSP70. Furthermore, we found strong induction of ATF4 and the ATM/H2AX pathway, both of which are critically involved in the integrated cellular response following proteotoxic and oxidative stress. Taken together, our data indicate that ancistrocladinium A targets cellular stress regulation in MM and improves the therapeutic response to PIs or overcomes PI resistance, and thus may represent a promising potential therapeutic agent.
Helically Twisted Graphene Nanoribbons: Bottom-up Stereospecific Synthesis and Characterization
(2024)
Over the past decade, substantial progress has been made in synthesizing atomically precise carbon nanostructures, with a focus on graphene nanoribbons (NRs) through advanced synthetic techniques. Despite these advancements, precise control over the stereochemistry of twisted NRs remains challenging. This thesis introduces a strategic approach to achieve absolute control over the single-handed helical conformation in a cove-edged NR, utilizing enantiopure [n]helicenes as a molecular wrench to intricately dictate the overall conformation of the NR.
Enantiopure [7]helicenes were stitched to the terminal K-regions of a conjugated pyrene NR using a stereospecific and site-selective palladium(II)-catalyzed annulative π-extension (APEX) reaction, resulting in a helically twisted NR with an end-to-end twist of 171°, the second-largest twist reported so far in the literature for twistacenes. The helical end-to-end twist increases with each addition of benzene ring to the central acene core, suggesting that the extra strain induced by the terminal [7]helicenes maintains such a high level of twist.
The quantum chemical calculations were conducted to investigate the impact of twisting on the conformational population. At room temperature, the central backbone of the nanoribbon adopts the twisted helicity opposite to that of the attached [7]helicene, constituting around 99% of the molecular population. For instance, (P)-[7]helicenes produce a left-handed helical nanoribbon, while (M)-[7]helicenes produce a right-handed helical nanoribbon. In the presence of helicenes of opposite chirality, the nanoribbon adopts a waggling conformation. The helically twisted nanoribbons are conformationally robust, as variable temperature chiroptical measurements showed no change in CD and CPL spectra. The proposed strategy, involving the late-stage addition of [n]helicene units through the APEX reaction, appears promising for streamlining the synthesis of diverse cove edge NR variants with desired conformations.
In addition to single-handed helically twisted nanoribbons, the symmetry-based functional properties of C2 and C1 symmetric pyrene-fused single and double [n]helicene compounds were studied. Owing to its higher structural rigidity, the C1 symmetric heptagonal ring-containing molecules exhibited exceptional configurational stability along with remarkable chiroptical properties compared to their C2 symmetric as well as pristine helicene congeners.
The goal of this thesis was to investigate the influence of rotational restriction between individual parts and of the varying electron density in the bridging unit of D B A systems on the exchange interaction 2J, and thus the electronic coupling between a donor state and an acceptor state. A better understanding of how to influence the underlaying spin dynamics in such donor acceptor systems can open up the door to new technologies, such as modern molecular electronics or optoelectronic devices.
Therefore, three series of molecules consisting of a TAA electron donor, a TTC or ATC bridging unit and a PDI electron acceptor were studied. To investigate the influence of rotational restriction on 2J and the electronic coupling, a series of four rotationally hindered triads (chapter 6) was synthesised. The dihedral angle between the TAA and the TTC as well as between the TTC and the PDI was restricted by ortho methyl groups at the phenylene linkers of the connecting ends to the TTC bridge, producing a twist around the linking single bond which minimises the π overlap. The triads exhibit varying numbers of ortho methyl groups and therefore different degrees of rotational restriction. In order to shine light on the influence of varying electron density on 2J and the electronic coupling, a series of four substituted triptycene triads (chapter 7) was synthesised. The electron density in the TTC bridging unit was varied by electron donating and electron withdrawing groups in 12,13 position of the TTC bridging unit and thus varying its HOMO/LUMO energy. The last series of two anthracene bridge triads (chapter 8) connected both approaches by restricting the rotation with ortho methyl groups and simultaneously by varying the bridge energies.
In order to obtain the electronic properties, steady state absorption and emission spectra of all triads were investigated (chapter 4). Here, all triads show spectral features associated with the separate absorption bands of TAA and the PDI moiety. The reduced QYs, compared to the unsubstituted PDI acceptor, indicate a non radiative quenching mechanism in all triads. The CV data (chapter 5) were used to calculate the energies of possible CSSs and those results were used to assign the CR dynamics into the different Marcus regions. fs TA measurements reveal that all triads form a CSS upon excitation of the PDI moiety. The lifetimes of the involved states and the rate constants were determined by global exponential fits and global target analysis. The CR dynamics upon depopulation of the CSSs were investigated using external magnetic field dependent ns TA spectroscopy. The ns TA maps show that all triads recombine via CRT pathway populating the local 3PDI state in toluene and provided the respective lifetimes. The approximate QYs of triplet formation were determined using actinometry. The magnetic field dependent ns TA data reveal the exchange interaction 2J between singlet and triplet CSS for each triad. Those magnetic field dependent ns TA data in toluene were furthermore treated using a quantum mechanical simulation (done by U.E. Steiner) to extract the rate constants kT and kS for CRT and CRS, respectively. However, the error margins of kS were rather wide. Finally, the electronic couplings between the donor and the acceptor states were obtained by combining the aforementioned experimental results of the rate constants and applying the Bixon Jortner theoretical description of diabatic ET and Andersons perturbative theory of the exchange coupling. Therefore, the experimentally determined values of 2J and the calculated values of kCS and kT were used. The rate constant kS was calculated based on the electronic coupling V1CSS 1S0.
The rotationally hindered triads (chapter 6) show a strong influence of the degree of rotational restriction on the lifetimes and rate constants of the CS processes. The rate constants of CS are increasing with increasing rotational freedom. The magnetic field dependent decay data show that the exchange interactions increase with increasing rotational freedom. Based on the CR dynamics, the calculated electronic couplings of the ET processes reflect the same trend along the series. Here, only singlet couplings turned out to be strongly influenced while the triplet couplings are not. Therefore, this series shows that the ET dynamics of donor acceptor systems can strongly be influenced by restricting the rotational freedom.
In the substituted triptycene triads (chapter 7), decreasing electron density in the bridging unit causes a decrease of the CS rate constants. The magnetic field dependent decay data show that with decreasing electron density in the bridge the exchange interaction decreases. The CR dynamics-based rate constants and the electronic couplings follow the same trend as the exchange interaction. This series shows that varying the HOMO/LUMO levels of the connecting bridge between donor and acceptor strongly influences the ET processes.
In the anthracene bridge triads (chapter 8), the CS process is slow in both triads. The CR was fast in the anthracene triad and is slowed down in the methoxy substituted anthracene bridge triad. The increase of the exchange interaction with increasing electron density in the bridge was more pronounced than in the substituted triptycene triads. Thus, the variation of electron density in the bridge strongly influences the ET processes even though the rotation is restricted.
In this thesis, it was shown that the influence of the rotational hindrance as well as the electron density in a connecting bridge have strong influence on all ET processes and the electronic coupling in donor acceptor systems. These approaches can therefore be used to modify magnetic properties of new materials.
The reversible condensation of catechols and boronic acids to boronate esters is a paradigm reaction in dynamic covalent chemistry. However, facile backward hydrolysis is detrimental for stability and has so far prevented applications for boronate-based materials. Here, we introduce cubic boronate ester cages 6 derived from hexahydroxy tribenzotriquinacenes and phenylene diboronic acids with ortho-t-butyl substituents. Due to steric shielding, dynamic exchange at the Lewis acidic boron sites is feasible only under acid or base catalysis but fully prevented at neutral conditions. For the first time, boronate ester cages 6 tolerate substantial amounts of water or alcohols both in solution and solid state. The unprecedented applicability of these materials under ambient and aqueous conditions is showcased by efficient encapsulation and on-demand release of β-carotene dyes and heterogeneous water oxidation catalysis after the encapsulation of ruthenium catalysts.