Extensive Quinoidal Oligothiophenes with Dicyanomethylene Groups at Terminal Positions as Highly Amphoteric Redox Molecules
作者:Toshiaki Takahashi、Ken-ichi Matsuoka、Kazuo Takimiya、Tetsuo Otsubo、Yoshio Aso
DOI:10.1021/ja051840m
日期:2005.6.1
A series of highly extensive quinoidal oligothiophenes carrying a dicyanomethylene group at both terminal positions is synthesized. As the quinoidal structures extend, they have highly amphoteric abilities and show strong electronic absorptions in the visible to near-infrared region. The higher homologues, quinquethiophene and sexithiophene, exist as equilibrium mixtures with the biradical species.