title: Regioregular pyridal[2,1,3]thiadiazole π-conjugated copolymers.
abstract: π-Conjugated, narrow band gap copolymers containing pyridal[2,1,3]thiadiazole (PT) were synthesized via starting materials that prevent random incorporation of the PT heterocycles relative to the backbone vector. Two regioregular structures could be obtained: in one the PTs are oriented in the same direction, and in the other the orientation of the PTs alternates every other repeat unit. Compared to their regiorandom counterparts, the regioregular polymers exhibit a 2 orders of magnitude increase of the hole mobilites, from 0.005 to 0.6 cm(2) V(-1) s(-1), as determined by field-effect transistor measurements.
authors.affiliation: Center for Polymers and Organic Solids, Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, USA.
authors.forename: Lei
authors.initials: L
authors.lastname: Ying
authors.forename: Ben B Y
authors.initials: BB
authors.lastname: Hsu
authors.forename: Hongmei
authors.initials: H
authors.lastname: Zhan
authors.forename: Gregory C
authors.initials: GC
authors.lastname: Welch
authors.forename: Peter
authors.initials: P
authors.lastname: Zalar
authors.forename: Louis A
authors.initials: LA
authors.lastname: Perez
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Kramer
authors.forename: Thuc-Quyen
authors.initials: TQ
authors.lastname: Nguyen
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Heeger
authors.forename: Wai-Yeung
authors.initials: WY
authors.lastname: Wong
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan