title: Synthesis, properties, and n-type transistor characteristics of π-conjugated compounds having a carbonyl-bridged thiazole-fused polycyclic system.
abstract: A series of electron-deficient π-conjugated systems with 4,9-dihydro-s-indaceno[2,1-d:6,5-d']dithiazole-4,9-dione-based structures and fluorinated acyl groups as the terminal units have been designed and synthesized for application as organic field-effect transistor (OFET) materials. The thermal, photophysical, and electrochemical properties and OFET performance of the synthesized compounds were investigated. OFET evaluation revealed that all compounds exhibited typical electron-transporting characteristics, and electron mobilities up to 0.26 cm(2)  V(-1)  s(-1) could be achieved. The air stabilities of OFET operation were dependent on the nature of the compounds and were investigated by X-ray diffraction and atomic force microscopy. The terminal units had a great influence not only on the molecular properties, but also on the film-forming properties and OFET performance.
authors.affiliation: The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan), Fax: (+81) 6-6879-8479; JST-PRESTO, 4-1-8, Honcho, Kawaguchi, Saitama 333-0012 (Japan). yutakaie@sanken.osaka-u.ac.jp.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ie
authors.forename: Chihiro
authors.initials: C
authors.lastname: Sato
authors.forename: Masashi
authors.initials: M
authors.lastname: Nitani
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Tada
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Aso
keywords: charge transfer; electron transport; semiconductors; structure-activity relationships; thin films