title: Improved stability of a metallic state in benzothienobenzothiophene-based molecular conductors: an effective increase of dimensionality with hydrogen bonds.
abstract: A dihydroxy-substituted benzothienobenzothiophene, BTBT(OH)2, was synthesized, and its charge-transfer (CT) salt, β-[BTBT(OH)2]2ClO4, was successfully obtained. Thanks to the introduced hydroxy groups, a hydrogen-bonded chain structure connecting the BTBT molecules and counter anions was formed in the CT salt, which effectively increases the dimensionality of the electronic structure and consequently leads to a stable metallic state.
authors.affiliation: The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. thigashino@issp.u-tokyo.ac.jp a-ueda@issp.u-tokyo.ac.jp hmori@issp.u-tokyo.ac.jp.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Higashino
authors.forename: Akira
authors.initials: A
authors.lastname: Ueda
authors.forename: Junya
authors.initials: J
authors.lastname: Yoshida
authors.forename: Hatsumi
authors.initials: H
authors.lastname: Mori