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[Sensor Actuat B-Chem] Aggregation-induced emission of tetraphenylethylene-modified polyethyleneimine for highly selective CO2 detection
作者:Wei Lu, Peng Xiao, Jincui Gu, Jiawei Zhang, Youju Huang, Qing Huang and Tao Chen*
關鍵字:Aggregation-induced emission; Carbon dioxide; Fluorescent sensor; Polyethyleneimine; Tetraphenylethylene
論文來源:期刊
具體來源:Sensor Actuat B-Chem, 2016, 228, 551-556
發(fā)表時間:2016年

A polymer-based visible and quantitative fluorometric assay for CO2 gas is constructed using branched polyethyleneimine (PEI) covalently modified with tetraphenylethylene (TPE). The sensing mechanism relies on the reaction of CO2 with alkylamines of PEI to induce the “solution-to-precipitation” phase transition of the sensory polymer (TPE-PEI), thus resulting in strong aggregation-induced fluorescent emission of TPE-PEI. It works in a relatively environmental benign ethanol medium and avoids the use of toxic amine compounds with unpleasant odor. More importantly, this system is proved to be highly tolerant to possibly coexisting water, carbon monoxide, acid SO2 and H2S gases as well as many common volatile organic compounds. These characteristics make the presently developed fluorescent chemosensor hold great potential for many real-world applications.

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