title: A fully substituted 3-silolene functions as promising building block for hyperbranched poly(silylenevinylene).
abstract: A 3-silolene derivative, 2,2,5,5-tetrakis(dimethylsilyl)-1,1-dimethyl-3,4-diphenyl-3-silolene (TDMSHS), is first synthesized and characterized by X-ray diffraction crystallography and spectroscopic methods. Hydrosilylation polymerization of TDMSHS with 1,1-dimethyl-2,5-bis(4-ethynylphenyl)-3,4-diphenylsilole in the presence of Karstedt's catalyst generates a stereoregular silole-containing hyperbranched poly(silylenevinylene) (hb-SPSV) with a high molecular weight (M(w) = 146,000, M(w)/M(n) = 1.5) in high yield (≈95%). hb-SPSV exhibits excellent thermal stability and strong fluorescence, and the emission of its aggregates in aqueous mixture can be quenched efficiently by picric acid with large quenching constants K(SV) up to 414400 M(-1).
authors.affiliation: College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Zujin
authors.initials: Z
authors.lastname: Zhao
authors.forename: Yanju
authors.initials: Y
authors.lastname: Guo
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.forename: Zhengfeng
authors.initials: Z
authors.lastname: Chang
authors.forename: Jacky W Y
authors.initials: JW
authors.lastname: Lam
authors.forename: Liwen
authors.initials: L
authors.lastname: Xu
authors.forename: Huayu
authors.initials: H
authors.lastname: Qiu
authors.forename: Ben Zhong
authors.initials: BZ
authors.lastname: Tang
mesh_terms: D002384:Catalysis; D018360:Crystallography, X-Ray; D008970:Molecular Weight; D017646:Organosilicon Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D012821:Silanes / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017646:Organosilicon Compounds; D011108:Polymers; D012821:Silanes; C540376:silole