文献类型：期刊文献

英文题名：Dual-emission fluorescent probe templated by spherical polyelectrolyte brush for ratiometric detection of copper ions

作者：Ye, Zhishuang[1];Li, Li[1];Zhao, Fang[1];Yang, Qingsong[1];Wang, Yunwei[1];Bohinc, Klemen[2];Guo, Xuhong[1,3,4,5]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Ljubljana, Fac Hlth Sci, Ljubljana 1000, Slovenia;[3]Shihezi Univ, Engn Res Ctr Mat Chem Engn Xinjiang Bingtuan, Shihezi 832000, Xinjiang, Peoples R China;[4]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[5]Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：55

期号：23

起止页码：10168

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：;EI(收录号：20202008668993);WOS:【SCI-EXPANDED(收录号:WOS:000532143600007)】；

基金：Financial support by the NSFC Grants (51761135128 and 51773061), the Key Scientific and Technological Project of Xinjiang Bingtuan (2018AB025) and the technical support by Shanghai Synchrotron Radiation Facility are gratefully acknowledged.

语种：英文

外文关键词：Fluorescence spectroscopy - Polyelectrolytes - Copper - Copper compounds - Semiconductor quantum dots - Fluorescence - Styrene - Cadmium telluride - II-VI semiconductors - Europium compounds - Metal ions

摘要：A novel ratiometric fluorescent probe for Cu2+ was fabricated in spherical polyelectrolyte brush (SPB) where the red-emission europium complex Eu(TTA)(3)Phen was embedded in the polystyrene (PS) core to generate the reference signal and the green-emission glutathione-capped CdTe quantum dot was immobilized onto the poly(styrene sulfonate) brush shell to provide the sensing signal. Results indicate that this probe has high sensitivity and selectivity for Cu2+ over other metal ions. The addition of Cu2+ could greatly quench the probe's fluorescence at 550 nm, while the fluorescence signal at 614 nm kept unchanged. Under the optimized conditions, the intensity ratio of the two fluorescence emissions showed a linear response range from 0 to 1000 nM with a limit of detection of 1.45 nM for Cu2+. The probe is very suitable for the detection of copper contamination with quick response, low cost and great stability. SPB was proved to be an excellent "carrier" for building high-quality ratiometric probes due to its special core-shell structure and outstanding ability to enrich counterions. This work provides a versatile method for the development of high-quality ratiometric fluorescent probes, which can be extended to potential applications in various fields, such as environmental monitoring, biological imaging, pathological analysis and cancer diagnosis.