title: Aggregation-Induced Emission in a Hyperbranched Poly(silylenevinylene) and Superamplification in Its Emission Quenching by Explosives.
abstract: A silicon-containing hyperbranched polymer (hb-P1/2) with σ*-π* conjugation was prepared in a good yield and high molecular weight by rhodium-catalyzed alkyne polyhydrosilylation of 1,2-bis(4-ethynylphenyl)-1,2-diphenylethene (1) with tris(4-dimethylsilylphenyl)amine (2). The polymer was thermally stable, losing merely 5% of its weight when heated to ≈445 °C. Whereas hb-P1/2 was weakly luminescent when molecularly dissolved, it became highly emissive when supramolecularly aggregated, showing an aggregation-induced emission (AIE) phenomenon. A superamplification effect was observed when the AIE nanoaggregates were used as fluorescent chemosensor for explosive detection: the quenching efficiency was greatly increased in a nonlinear fashion with increasing quencher concentration.
authors: Department of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China; HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China; Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong, China.
authors: Ping
authors: P
authors: Lu
authors: Jacky W Y
authors: JW
authors: Lam
authors: Jianzhao
authors: J
authors: Liu
authors: Cathy K W
authors: CK
authors: Jim
authors: Wangzhang
authors: W
authors: Yuan
authors: Ni
authors: N
authors: Xie
authors: Yongchun
authors: Y
authors: Zhong
authors: Qin
authors: Q
authors: Hu
authors: Kam Sing
authors: KS
authors: Wong
authors: Kevin K L
authors: KK
authors: Cheuk
authors: Ben Zhong
authors: BZ
authors: Tang