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Journal of Materials Science
Published in: Journal of Materials Science 23/2020

12-05-2020 | Materials for life sciences

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

Authors: Zhishuang Ye, Li Li, Fang Zhao, Qingsong Yang, Yunwei Wang, Klemen Bohinc, Xuhong Guo

Published in: Journal of Materials Science | Issue 23/2020

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Abstract

A novel ratiometric fluorescent probe for Cu2+ was fabricated in spherical polyelectrolyte brush (SPB) where the red-emission europium complex Eu(TTA)3Phen 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.
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Appendix
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Metadata
Title
Dual-emission fluorescent probe templated by spherical polyelectrolyte brush for ratiometric detection of copper ions
Authors
Zhishuang Ye
Li Li
Fang Zhao
Qingsong Yang
Yunwei Wang
Klemen Bohinc
Xuhong Guo
Publication date
12-05-2020
Publisher
Springer US
Published in
Journal of Materials Science / Issue 23/2020
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-020-04757-6

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