title: Improved synthesis of 2,2'-dibromo-9,9'-spirobifluorene and its 2,2'-bisdonor-7,7'-bisacceptor-substituted fluorescent derivatives.
abstract: Pure 2,2'-Dibromo-9,9'-spirobifluorene was synthesized by a method that did not involve troublesome dibromination of 9,9'-spirobifluorene or Sandmeyer reaction of 2,2'-diamino-9,9'-spirobifluorene. A series of donor-acceptor orthogonally substituted 9,9'-spirobifluorene was subsequently prepared showing rich variation of fluorescence in solution and in solid state. [reaction: see text]
authors.affiliation: Department of Applied Chemistry, National Chiao Tung University, Hsin-Chu, Taiwan 30035.
authors.forename: Chih-Long
authors.initials: CL
authors.lastname: Chiang
authors.forename: Ching-Fong
authors.initials: CF
authors.lastname: Shu
authors.forename: Chin-Ti
authors.initials: CT
authors.lastname: Chen
mesh_terms: D002384:Catalysis; D005449:Fluorenes / Q000138:chemical synthesis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis*; D006842:Hydrocarbons, Brominated / Q000138:chemical synthesis*; D015394:Molecular Structure; D013141:Spiro Compounds / Q000138:chemical synthesis*
chemical_list: C511229:2,2'-dibromo-9,9'-spirobifluorene; D005449:Fluorenes; D005456:Fluorescent Dyes; D006842:Hydrocarbons, Brominated; D013141:Spiro Compounds