posted on 2007-05-24, 00:00authored byYutaka Ie, Masashi Nitani, Motomi Ishikawa, Ken-ichi Nakayama, Hirokazu Tada, Takahiro Kaneda, Yoshio Aso
The synthesis of difluoromethylene-bridged bithiophene and its oligothiophenes are reported. The spectroscopic and electrochemical measurement
as well as X-ray analyses unambiguously revealed that the difluoromethylene bridge largely contributes to keeping planarity between the
thiophene rings and lowering the LUMO level. The perfluorohexyl-substituted quaterthiophene derivatives showed n-type semiconducting
behavior with field-effect electron mobilities up to 0.018 cm2 V-1 s-1.