Protamine-stabilized gold nanoclusters as a fluorescent nanoprobe for lead(II) via Pb(II)–Au(I) interaction

The authors report on a one-pot approach for synthesizing highly fluorescent protamine-stabilized gold nanoclusters. These are shown to be a viable nanoprobe for selective and sensitive fluorometric determination of lead(II) via quenching of fluorescence via Pb(II)-Au(I) interaction. Under optimized...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2018-10, Vol.185 (10), p.483-10, Article 483
Main Authors: Huang, Yan-Qin, Yang, Li-Na, Wang, Yong-Sheng, Xue, Jin-Hua, Chen, Si-Han
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Fluorescence
Gold
Lead
Microengineering
Nanochemistry
Nanoclusters
Nanotechnology
Original Paper
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Summary:The authors report on a one-pot approach for synthesizing highly fluorescent protamine-stabilized gold nanoclusters. These are shown to be a viable nanoprobe for selective and sensitive fluorometric determination of lead(II) via quenching of fluorescence via Pb(II)-Au(I) interaction. Under optimized conditions, fluorescence measured at excitation/emission peaks of 300/599 nm drops in the 80 nM–15 μM lead(II) concentration range. The detection limit is 24 nM, and relative standard deviations (for n  = 11) at concentrations of 0.10, 4.0 and 15 μM are 1.6, 2.5 and 1.9%, respectively. The relative recoveries of added lead(II) in the water samples ranged from 97.9 ± 2.29% to 101.2 ± 1.83%. Graphical abstract Lead(II) ions are found to be able to selectively and sensitively quench the fluorescence of the protamine-gold nanoclusters (PRT-AuNCs). Thereby, an inexpensive, selective and sensitive lead(II) assay was established.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-018-3019-8