Abstract
L-glutathione decorated Mn doped ZnS QDs (GSH-Mn: ZnS QDs) were synthesized in aqueous solution. The characterization of as-prepared QDs was carried out through fluorescence, ultraviolet-visible absorption (UV-vis), TEM and Fourier transform infrared spectroscopy (FTIR). Pb2+ had obvious quenching effect on the fluorescence intensity of GSH-Mn: ZnS QDs. Under optimal factors, a nice linear relationship between the fluorescence response and the concentration of Pb2+ was established from 0.025μM to 15.5μM range with a correlation coefficient of 0.9981 and the detection limit is 0.018μM. This probe was triumphantly made use of the detecting of Pb2+ in tap and pond water. At the same time, it was preliminary inferred that the fluorescence quenching way of Pb2+ to QDs was dynamic quenching. The present study provides a simple, low-cost route toward production of GSH-Mn: ZnS QDs for chemo/bio sensing and other adhibition.
Original language | English |
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Pages (from-to) | 168-174 |
Number of pages | 7 |
Journal | Current Analytical Chemistry |
Volume | 11 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 May 2015 |
Scopus Subject Areas
- Analytical Chemistry
User-Defined Keywords
- Fluorescence quenching
- Glutathione
- Mn: ZnS QDs
- Pb