[Sensor Actuat B-Chem] Aggregation-induced emission of tetraphenylethylene-modified polyethyleneimine for highly selective CO2 detection
writer：Wei Lu, Peng Xiao, Jincui Gu, Jiawei Zhang, Youju Huang, Qing Huang and Tao Chen*
keywords：Aggregation-induced emission; Carbon dioxide; Fluorescent sensor; Polyethyleneimine; Tetraphenylethylene
source：期刊
specific source：Sensor Actuat B-Chem, 2016, 228, 551-556
Issue time：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.