title: Semiconducting 2,6,9,10-tetrakis(phenylethynyl)anthracene derivatives: effect of substitution positions on molecular energies.
abstract: 2,6-Bis((4-hexylphenyl)ethynyl)-9,10-bis(phenylethynyl)anthracene, 4, and 9,10-bis((4-hexylphenyl)ethynyl)-2,6-bis (phenyl ethynyl)anthracene, 5, have been synthesized to study their electronic and photophysical properties. It should be noted that the difference between these compounds is the substitution position of 1-ethynyl-4-hexylbenzene groups into an anthracene ring. In particular, substitution in the 9,10-positions of the anthracene ring enhanced J-aggregated intermolecular interactions. Since 5 has a lower bandgap energy and more compact film morphology, it exhibited higher hole mobility (∼0.27 cm(2) V(-1) s(-1)) in thin-film transistor devices.
authors.affiliation: Department of Chemistry, College of Science, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul 136-701, Korea.
authors.forename: Jung A
authors.initials: JA
authors.lastname: Hur
authors.forename: Suk Young
authors.initials: SY
authors.lastname: Bae
authors.forename: Kyung Hwan
authors.initials: KH
authors.lastname: Kim
authors.forename: Tae Wan
authors.initials: TW
authors.lastname: Lee
authors.forename: Min Ju
authors.initials: MJ
authors.lastname: Cho
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Choi