title: Tetrathio and tetraseleno[8]circulenes: synthesis, structures, and properties.
abstract: Novel sulfur and selenium-bridged [8]circulenes were prepared from octabromotetraphenylene. Structures of these compounds were unambiguously confirmed by X-ray crystallographic analyses. Photophysical and electrochemical investigations of these [8]circulenes suggest their potential applications as electronic materials. The antiaromatic nature of tetrathio[8]circulene and tetraselenium[8]circulene was studied by computational methods, and the NICS computational results reveal that the central eight-membered ring has highly antiaromatic character.
authors.affiliation: Department of Chemistry, State Key Laboratory of Synthetic Chemistry, Center of Novel Functional Molecules, and Institute of Molecular Functional Materials, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR (China), Fax: (+852) 26035315.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Xiong
authors.forename: Chun-Lin
authors.initials: CL
authors.lastname: Deng
authors.forename: Boris F
authors.initials: BF
authors.lastname: Minaev
authors.forename: Gleb V
authors.initials: GV
authors.lastname: Baryshnikov
authors.forename: Xiao-Shui
authors.initials: XS
authors.lastname: Peng
authors.forename: Henry N C
authors.initials: HN
authors.lastname: Wong
keywords: [8]circulene; antiaromaticity; density functional theory calculation; electrochemistry; photophysics