title: Stable 7,14-disubstituted-5,12-dithiapentacenes with quinoidal conjugation.
abstract: Two 7,14-disubstituted-5,12-dithiapentacenes (1 and 2) with quinoidal conjugation were synthesized. Their ground-state quinoidal structures were proven by X-ray crystallographic analysis. They showed very different electronic and optical properties from those of the corresponding pentacene derivatives with diene conjugation, and their stability was significantly improved. Organic field effect transistors based on solution processed thin films of 1 and 2 exhibited a hole mobility of up to 0.032 cm(-2) V(-1) s(-1).
authors.affiliation: Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore, 117543, Singapore.
authors.forename: Qun
authors.initials: Q
authors.lastname: Ye
authors.forename: Jingjing
authors.initials: J
authors.lastname: Chang
authors.forename: Xueliang
authors.initials: X
authors.lastname: Shi
authors.forename: Gaole
authors.initials: G
authors.lastname: Dai
authors.forename: Wenhua
authors.initials: W
authors.lastname: Zhang
authors.forename: Kuo-Wei
authors.initials: KW
authors.lastname: Huang
authors.forename: Chunyan
authors.initials: C
authors.lastname: Chi