title: Crystalline supramolecular nanofibers based on dehydrobenzoannulene derivatives.
abstract: Supramolecular nanofibers (SNFs) composed of low-molecular-weight π-conjugated molecules exhibit attractive optical and electrical properties and are expected to be the next optoelectronic materials. In this work, five crystalline SNFs have been constructed from three dehydrobenzoannulene (DBA) derivatives. The DBAs were designed to assemble in one dimension in a strategy based on anisotropic crystal growth. The crystallinity of the SNFs allowed the molecular arrangements in the SNFs to be determined. Therefore the mechanism of construction and correlations between the molecular arrangements and optical and electrical properties could be considered. The results clearly indicate that the properties of the SNFs are affected by the chemical structures and molecular arrangements. Moreover, one of the SNFs exhibits a high charge-carrier mobility (Σμ=0.61 cm(2) V(-1) s(-1)) because of its crystallinity and appropriate molecular arrangement. This systematic experimental study based on a proposed strategy has provided information for improving the electrical properties of SNFs. This strategy will lead to highly functional SNFs.
authors.affiliation: Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan), Fax: (+81) 6-6879-7404.
authors.forename: Hajime
authors.initials: H
authors.lastname: Shigemitsu
authors.forename: Ichiro
authors.initials: I
authors.lastname: Hisaki
authors.forename: Eriko
authors.initials: E
authors.lastname: Kometani
authors.forename: Daisuke
authors.initials: D
authors.lastname: Yasumiya
authors.forename: Yuu
authors.initials: Y
authors.lastname: Sakamoto
authors.forename: Keisuke
authors.initials: K
authors.lastname: Osaka
authors.forename: Tejender S
authors.initials: TS
authors.lastname: Thakur
authors.forename: Akinori
authors.initials: A
authors.lastname: Saeki
authors.forename: Shu
authors.initials: S
authors.lastname: Seki
authors.forename: Fumiko
authors.initials: F
authors.lastname: Kimura
authors.forename: Tsunehisa
authors.initials: T
authors.lastname: Kimura
authors.forename: Norimitsu
authors.initials: N
authors.lastname: Tohnai
authors.forename: Mikiji
authors.initials: M
authors.lastname: Miyata
mesh_terms: D003460:Crystallization / Q000379:methods*; D008970:Molecular Weight; D057139:Nanofibers / Q000737:chemistry*
keywords: annulenes; charge-carrier mobility; dipole moment; solid-state structures; supramolecular chemistry