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Bis- and Tris-fused Tetrathiafulvalenes Extended with Anthracene-9,10-diylidene
Daisuke Ogi1, Yusuke Fujita1, Shigeki Mori2,3
1Department of Applied Chemistry, Graduate School of Engineering, Ehime University , 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan.
Abstract:
Bis- and tris-fused π-electron donors composed of extended tetrathiafulvalene with anthraquinoid spacers (4 and 5) were successfully synthesized. X-ray structure analysis of tetrakis(methylthio)-5 (5a) revealed that the molecule adopted a transoid-cisoid conformation. The cyclic voltammogram of 4a is composed of two pairs of two-electron redox waves, while the cyclic voltammogram of tetrakis(hexylthio) derivative 5b consists of one pair of four-electron redox waves and one pair of two-electron redox waves, respectively. Spectroelectrochemistry of 4a and 1H NMR spectrum of a 4b salt revealed that two positive charges in 42+ are distributed mainly on one TTFAQ (9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene) moiety.
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