title: Synthesis, structures, and optical properties of heteroarene-fused dispiro compounds.
abstract: Novel heteroarene-fused dispiro compounds, dispiro[9H-fluorene-9,5'(6'H)-diindeno[1,2-b:2',1'-d]furan-6',9''-[9H]fluorene] (dsp-DIF), dispiro[9H-fluorene-9,5'(6'H)-diindeno[1,2-b:2',1'-d]thiophene-6',9''-[9H]fluorene] (dsp-DIT), and 11-phenyldispiro[9H-fluorene-9,5'(6'H)-diindeno[1,2-b:2',1'-d]pyrrole-6',9''-[9H]fluorene] (dsp-DIP-Ph) have been synthesized. Their structures were unambiguously determined by X-ray crystallography. These three dispiro compounds showed blue fluorescence with moderate quantum yields.
authors.affiliation: Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Kowada
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Kuwabara
authors.forename: Kouichi
authors.initials: K
authors.lastname: Ohe