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- Title
A turn-on fluorescent nanoprobe for lead(II) based on the aggregation of weakly associated gold(I)-glutathione nanoparticles.
- Authors
Zhang, Hailiang; Wang, Shuailiang; Chen, Zhu; Ge, Peng; Jia, Ranran; Xiao, Enhua; Zeng, Wenbin
- Abstract
The authors describe a method for ethanol induced formation of a fluorescent nanoprobe for sensitive fluorometric 'turn-on' detection of Pb based on aggregation-induced emission (AIE) of the Au(I)-glutathione (GSH) complex. On addition of Pb, their strong interaction with GSH causes the Au(I)-SG complexes to come in close proximity, and this results in a turn-on fluorescence with a strong emission peaking at 595 nm. The findings were utilized to design a method for quantitation of Pb. Interestingly, sensitivity is largely enhanced in the presence of ethanol due to the formation of dense Au(I)-SG nanoparticles. The fraction of ethanol is optimized. Response to Pb occurs within a few seconds. The assay covers the 2.0 to 350 μM Pb(II) concentration range, has a 0.1 μM limit of detection, and has a satisfactory selectivity over other environmental metal ions.
- Subjects
NANO-probe sensors; LEAD; GOLD nanoparticles; GLUTATHIONE; METAL ions; ETHANOL
- Publication
Microchimica Acta, 2017, Vol 184, Issue 10, p4209
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-017-2406-x