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Imidazole as a Donor/Acceptor Unit in Charge-Transfer Chromophores with Extended pi-Linkers
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SYSNO ASEP 0363289 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Imidazole as a Donor/Acceptor Unit in Charge-Transfer Chromophores with Extended pi-Linkers Author(s) Kulhánek, J. (CZ)
Bureš, F. (CZ)
Pytela, O. (CZ)
Mikysek, T. (CZ)
Ludvík, Jiří (UFCH-W) RID, ORCIDSource Title Chemistry-An Asian Journal . - : Wiley - ISSN 1861-4728
Roč. 6, č. 6 (2011), s. 1604-1612Number of pages 9 s. Language eng - English Country DE - Germany Keywords charge transfer ; conjugation ; donor-acceptor systems Subject RIV CG - Electrochemistry CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000292097700043 DOI 10.1002/asia.201100097 Annotation Eleven new, stable, push-pull systems that feature 4,5-bis[4-(N,N-dimethylamino)phenyl]imidazole and 4,5-dicyanoimidazole as the donor and acceptor moieties and the systematically extended and varied pi-linker were prepared and investigated. Evaluation of the measured UV/Vis spectra, electrochemical data (cyclic voltammetry (CV), rotating-disc voltammetry (RDV), and polarography) and calculated beta and gamma polarizabilities showed efficient charge transfer (CT) in biimidazole-type chromophores. Push-pull system 27, which features a planar thiophene-derived pi-linker, was revealed to be the most efficient chromophore within the studied series. This chromophore possessed the most bathochromically shifted CT band, the lowest electrochemical gap, and highest beta and gamma polarizabilities. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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