Extensive quinoidal oligothiophenes with dicyanomethylene groups at terminal positions as highly amphoteric redox molecules.
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.
Takahashi
Toshiaki
T
Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
Matsuoka
Ken-Ichi
K
Takimiya
Kazuo
K
Otsubo
Tetsuo
T
Aso
Yoshio
Y
D008697:Methane / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D009570:Nitriles / Q000737:chemistry; D010084:Oxidation-Reduction; D011809:Quinones / Q000138:chemical synthesis* / Q000737:chemistry; D013876:Thiophenes / Q000138:chemical synthesis* / Q000737:chemistry
D009570:Nitriles; D011809:Quinones; D013876:Thiophenes; D008697:Methane