Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8451
Title: Aggregation-induced emission in a hyperbranched poly(silylenevinylene) and superamplification in its emission quenching by explosives
Authors: Lu, P
Lam, JWY
Liu, J
Jim, CKW
Yuan, W
Xie, N
Zhong, Y
Hu, Q
Wong, KS
Cheuk, KKL 
Tang, BZ
Keywords: Alkyne hydrosilylation
Fluorescence
Hyperbranched polymers
Sensors
Synthesis
Issue Date: 2010
Publisher: Wiley-VCH
Source: Macromolecular rapid communications, 2010, v. 31, no. 9-10, p. 834-839 How to cite?
Journal: Macromolecular rapid communications 
Abstract: A silicon-containing hyperbranched polymer (hb-P1/2) with sigma*-pi* 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 (ATE) phenomenon. A superamplification effect was observed when the ATE nanoaggregates were used as fluorescent chemosensor for explosive detection: the quenching efficiency was greatly increased in a nonlinear fashion with increasing quencher concentration.
URI: http://hdl.handle.net/10397/8451
ISSN: 1022-1336
DOI: 10.1002/marc.200900794
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