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Issue 3, 2011
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Vinyl spacers—tuning electron transfer through fluorene-based molecular wires

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Abstract

Rigid and soluble electron donor–acceptor conjugates (3 and 11) that combine π-extended tetrathiafulvalene (exTTF) as an electron donor and C60 as an electron acceptor have been synthesized using oligo-vinylfluorene (oFV) linkers to connect the electroactive entities. Fluorescence and transient absorption measurements confirm that light-induced excitation induces charge-transfer reactions over distances of 28 Å in THF. The incorporation of vinylene spacers into oligofluorene molecular wires has been shown both experimentally and theoretically to improve the charge-transfer features significantly to give a β value of 0.075 ± 0.001 Å−1. Enhanced π-conjugation caused by higher orbital overlap is responsible for this trend.

Graphical abstract: Vinyl spacers—tuning electron transfer through fluorene-based molecular wires

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Supplementary files

Article information


Submitted
28 Sep 2010
Accepted
15 Dec 2010
First published
08 Feb 2011

Energy Environ. Sci., 2011,4, 765-771
Article type
Paper

Vinyl spacers—tuning electron transfer through fluorene-based molecular wires

M. Wielopolski, J. Santos, B. M. Illescas, A. Ortiz, B. Insuasty, T. Bauer, T. Clark, D. M. Guldi and N. Martín, Energy Environ. Sci., 2011, 4, 765
DOI: 10.1039/C0EE00499E

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