Photoinduced charge transport over branched conjugation pathways: donor–acceptor substituted 1,1-diphenylethene and 2,3-diphenylbutadiene
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Date
2013-08-09
Authors
van Walree, Cornelius A
van der Wiel, Bas C
Williams, Rene M
Journal Title
Journal ISSN
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Publisher
Royal Society of Chemistry
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This journal is © the Owner Societies 2013
Rights Holder
the Owner Societies 2013
Abstract
Photoinduced charge transport in 1,1-diphenylethene and 2,3-diphenylbutadiene functionalized with an electron donating dimethylamino group and an electron accepting cyano group is reported. UV-spectroscopy reveals that in these compounds, which incorporate a cross-conjugated spacer, a direct charge transfer transition is possible. It is shown by application of the generalized Mulliken–Hush approach that introduction of an additional branching point in the π-electron spacer (i.e., when going from the 1,1-diphenylethene to the 2,3-diphenylbutadiene) leads to only a moderate reduction (68–92%) of the electronic coupling between the ground and the charge separated state. The σ-electron system is however likely to be dominant in the photoinduced charge separation process.
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This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence (http://creativecommons.org/licenses/by-nc/3.0/)
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Citation
van Walree C A, van der Wiel B C & Williams RM 2013, ' Photoinduced charge transport over branched conjugation pathways: donor–acceptor substituted 1,1-diphenylethene and 2,3-diphenylbutadiene', Physical Chemistry Chemical Physics, 15(36) pp. 15234-15242.