title: Cyclopentadithiophene (CPDT) dimer dication: bipolaron model for quaterthiophenes.
abstract: [structure: see text] Cyclopentadithiophene (CPDT) dimers in which both 3,3' and 4' ',3' " positions were bridged with 1,3-dioxalane, carbonyl, or dicyanovinylidene were prepared. These compounds have small HOMO-LUMO gaps (1.03-2.25 eV). The electrochemical oxidation of a dicyanovinylidene-bridged CPDT dimer gave a dication that had a quinoid-like structure.
authors.affiliation: Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumuyoshi-ku, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kozaki
authors.forename: Y
authors.initials: Y
authors.lastname: Yonezawa
authors.forename: K
authors.initials: K
authors.lastname: Okada