Refine
Has Fulltext
- yes (22)
Is part of the Bibliography
- yes (22)
Document Type
- Journal article (19)
- Preprint (3)
Language
- English (22) (remove)
Keywords
- boranes (3)
- cell imaging (3)
- RNA (2)
- fluorescence (2)
- luminescence (2)
- lysosome (2)
- organic chemistry (2)
- photoinduced electron transfer (2)
- singlet oxygen (2)
- two-photon absorption (2)
- two-photon excited fluorescence (2)
- 2-photon absorption (1)
- Amplification (1)
- Anorganische Chemie (1)
- Atomic and molecular interactions with photons (1)
- Chili RNA Aptamer (1)
- Chromophores (1)
- Co-Crystal Structures of Chili RNA (1)
- Conjugated polymers (1)
- DNA/RNA binding (1)
- DNA/RNA sensors (1)
- Design (1)
- Dyes (1)
- Emission (1)
- Energy transfer (1)
- Exciton localization dynamics (1)
- Fiels-effect transistors (1)
- Fluorescence (1)
- Fluorogenic RNA Aptamers (1)
- Helicene diimide (1)
- High efficiency (1)
- High performance (1)
- Intensity (1)
- K-region (1)
- Light-emitting diodes (1)
- Molecules (1)
- Multibranched structures (1)
- NIR OLED (1)
- One-photon (1)
- Optical Spectroscopy (1)
- Optical properties (1)
- Optical spectroscopy (1)
- Perovskite (1)
- Polymer-drug interaction (1)
- RU-(II) complexes (1)
- Ru(II)–Fe(II)–Ru(II) complex (1)
- Structural Biology (1)
- Synthetic Functional RNAs (1)
- UV/Vis spectroscopy (1)
- Vibronic contributions (1)
- X-ray Crystallography (1)
- X-ray crystallography (1)
- bis-terpyridyl ligands (1)
- borylation (1)
- chirality (1)
- curcumin (1)
- density functional calculations (1)
- donor-acceptor dyad (1)
- donor–acceptor dyads (1)
- drug delivery (1)
- dye chemistry (1)
- energy transfer dynamics (1)
- fluerescence (1)
- fluorenscence (1)
- fluorescent probes (1)
- helicenes (1)
- homochiral dimer (1)
- intersystem crossing (1)
- macrocycle (1)
- macrocycles (1)
- metal-to-ligand charge transfer (MLCT) (1)
- methyl viologen (1)
- multimetallic complexes (1)
- oligothiophene (1)
- oligothiophenes (1)
- optical spectroscopy (1)
- orylation (1)
- perylene bisimide (1)
- perylenebisimide (1)
- phthalocyanines (1)
- pol(2-oxazoline) (1)
- poly(2-oxazine) (1)
- polycyclic aromatic hydrocarbon (1)
- polycyclic aromatic hydrocarbons (1)
- polypyridyl complexes (1)
- radical (1)
- redox (1)
- solvent effects (1)
- squaraine polymer (1)
- structural biology (1)
- superstructure (1)
- supramolecular assembly (1)
- supramolecular folding (1)
- theranostics (1)
- triarylamine (1)
- upconversion (1)
Institute
Sonstige beteiligte Institutionen
EU-Project number / Contract (GA) number
- 646737 (1)
- 654000 (1)
- 682586 (1)
- LaserLab Europe (LLC001917) (1)
Energy Transfer Between Squaraine Polymer Sections: From helix to zig-zag and All the Way Back
(2015)
Joint experimental and theoretical study of the absorption spectra of squaraine polymers in solution provide evidence that two different conformations are present in solution: a helix and a zig-zag structure. This unique situation allows investigating ultrafast energy transfer processes between different structural segments within a single polymer chain in solution. The understanding of the underlying dynamics is of fundamental importance for the development of novel materials for light-harvesting and optoelectronic applications. We combine here femtosecond transient absorption spectroscopy with time-resolved 2D electronic spectroscopy showing that ultrafast energy transfer within the squaraine polymer chains proceeds from initially excited helix segments to zig-zag segments or vice versa, depending on the solvent as well as on the excitation wavenumber. These observations contrast other conjugated polymers such as MEH-PPV where much slower intrachain energy transfer was reported. The reason for the very fast energy transfer in squaraine polymers is most likely a close matching of the density of states between donor and acceptor polymer segments because of very small reorganization energy in these cyanine-like chromophores.