期刊
CURRENT APPLIED PHYSICS
卷 6, 期 5, 页码 934-938出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2005.01.043
关键词
tetrathiafulvalene; UV-vis-NIR absorption; electrochemical methods; ab initio quantum chemical methods and calculations
A series of multi-fused extended tetrathiafulvalene (TTF), in which thiophene ring is inserted between two 1,3-dithiole rings in TTF (ThTTF-n, n = 3-5,7), have been synthesized. In the electronic spectra, no significant red shift bas been observed as the number of fused extended TTFs increases. Cyclic voltammograms of the ThTTF-n are composed of n-2 pairs of two-electron transfer waves and two pair of one-electron-transfer ones, while four pairs of single-electron-transfer waves have been observed for ThTTF2. Molecular orbital calculation suggests the highest occupied molecular orbitals (HOMOs) of ThTTF-n spread over the molecule, while the lowest unoccupied molecular orbitals (LUMOs) are localized on the central thiophene moieties. (c) 2005 Elsevier B.V. All rights reserved.
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