TY  - JOUR
A1  - Lamberger, Zan
A1  - Zainuddin, Shakir
A1  - Scheibel, Thomas
A1  - Lang, Gregor
T1  - Polymeric Janus Fibers
JF  - ChemPlusChem
N2  - Janus fibers are a class of composite materials comprising mechanical and chemical to biological functionality. Combining different materials and functionalities in one micro- or even nanoscale fiber enables otherwise unreachable synergistic physicochemical effects with unprecedented opportunities for technical or biomedical applications. Here, recent developments of processing technologies and applications of polymeric Janus fibers will be reviewed. Various examples in the fields of textiles, catalysis, sensors as well as medical applications, like drug delivery systems, tissue engineering and antimicrobial materials, are presented to illuminate the outstanding potential of such high-end functional materials for novel applications in the upcoming future.
KW  - hybrid materials
KW  - polymers
KW  - nanofibers
KW  - spinning
KW  - Janus fibers
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-318516
VL  - 88
IS  - 2
ER  - 
TY  - JOUR
A1  - Riensch, Nicolas Alexander
A1  - Swoboda, Lukas
A1  - Lik, Artur
A1  - Krummenacher, Ivo
A1  - Braunschweig, Holger
A1  - Helten, Holger
T1  - Conjugated Bis(triarylboranes) with Disconnected Conjugation
JF  - Zeitschrift für anorganische und allgemeine Chemie
N2  - A series of methylene-bridged bis(triarylboranes) has been synthesized via two complementary routes using metal-free catalytic Si/B exchange condensation under mild conditions. The title compounds comprise two borane moieties that show effective internal π-conjugation involving the respective boron centers and the adjacent hetaryl groups. Conjugation between both borane units, however, is disrupted by the aliphatic linker. Cyclic voltammetry revealed minimal electronic communication between the boron centers, as evidenced by two closely spaced reduction processes. The UV-vis spectra showed bathochromic shifted absorption bands compared to related monoboranes, which is attributed to the methylene bridge. A further red-shift results upon introduction of methyl or SiMe\(_3\) groups at the terminal thiophene rings.
KW  - Boron
KW  - thiophene
KW  - conjugated oligomers
KW  - hybrid materials
KW  - boranes
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-258020
VL  - 647
IS  - 5
ER  - 
TY  - JOUR
A1  - Sanchez-Naya, Roberto
A1  - Stepanenko, Vladimir
A1  - Mandel, Karl
A1  - Beuerle, Florian
T1  - Modulation of Crystallinity and Optical Properties in Composite Materials Combining Iron Oxide Nanoparticles and Dye-Containing Covalent Organic Frameworks
JF  - Organic Materials
N2  - Two series of organic–inorganic composite materials were synthesized through solvothermal imine condensation between diketopyrrolopyrrole dialdehyde DPP-1 and 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (TAPP) in the presence of varying amounts of either amino- or carboxy-functionalized superparamagnetic iron oxide nanoparticles (FeO). Whereas high FeO loading induced cross-linking of the inorganic nanoparticles by amorphous imine polymers, a lower FeO content resulted in the formation of crystalline covalent organic framework domains. All hybrid materials were analyzed by magnetization measurements, powder X-ray diffraction, electron microscopy, IR, and UV/Vis absorption spectroscopy. Crystallinity, chromophore stacking, and visible absorption features are directly correlated to the mass fraction of the components, thus allowing for a fine-tuning of materials properties.
KW  - covalent organic frameworks
KW  - diketopyrrolopyrroles
KW  - porphyrins
KW  - iron oxide nanoparticles
KW  - hybrid materials
KW  - superparamagnetism
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-231480
VL  - 3
ER  - 
TY  - JOUR
A1  - Brosge, Felix
A1  - Lorenz, Thomas
A1  - Helten, Holger
A1  - Bolm, Carsten
T1  - BN- and BO-Doped Inorganic–Organic Hybrid Polymers with Sulfoximine Core Units
JF  - Chemistry - A European Journal
N2  - While polysulfones constitute a class of well‐established, highly valuable applied materials, knowledge about polymers based on the related sulfoximine group is very limited. We have employed functionalized diaryl sulfoximines and a p ‐phenylene bisborane as building blocks for unprecedented BN‐ and BO‐doped alternating inorganic–organic hybrid copolymers. While the former were accessed by a facile silicon/boron exchange protocol, the synthesis of polymers with main‐chain B–O linkages was achieved by salt elimination.
KW  - boron
KW  - hybrid materials
KW  - polymers
KW  - sulfoimines
KW  - sulfur
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-206194
VL  - 25
IS  - 55
ER  -