| Imidazole as a Donor/Acceptor Unit in Charge-Transfer Chromophores with Extended π-Linkers. | |
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MedLine Citation:
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PMID: 21598401 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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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 π-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 β and γ polarizabilities showed efficient charge transfer (CT) in biimidazole-type chromophores. Push-pull system 27, which features a planar thiophene-derived π-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 β and γ polarizabilities. The CT transition was most significantly affected by structural features such as π-linker length, planarity, conjugating arrangement, and the presence of olefinic/acetylenic or 1,4-phenylene/thiophene subunits in the π-linker. |
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Authors:
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Jiří Kulhánek; Filip Bureš; Oldřich Pytela; Tomáš Mikysek; Jiří Ludvík |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-19 |
Journal Detail:
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Title: Chemistry, an Asian journal Volume: - ISSN: 1861-471X ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101294643 Medline TA: Chem Asian J Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Affiliation:
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Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice, 53210 (Czech Republic), Fax: (+420) 46-603-7068. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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