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Preparation and use of Cu nanoclusters as fluorescent probes to determine Au(III) ions.
- Source :
-
Journal of Luminescence . May2017, Vol. 185, p258-262. 5p. - Publication Year :
- 2017
-
Abstract
- Polyethyleneimine-capped Cu nanoclusters (PEI-CuNCs) with a mean diameter of 2.5 nm and that emitted blue light at 485 nm were synthesized. The fluorescence of PEI-CuNCs was strongly quenched when Au(III) ions were present. Because of this specific response, a PEI-CuNC-based fluorescent turn-off sensor was developed. Under optimum conditions, a good linear relationship (R 2 =0.993) was found between the relative fluorescence intensity ( F 0 / F ) and the Au(III) ion concentration between 0.5 and 15 µM. The detection limit for Au(III) ions was 0.06 µM. The quenching mechanism was assessed by performing X-ray photoelectron spectroscopy spectra studies. The fluorescence quenching was ascribed to photo-induced electron transfer from the PEI-CuNCs to the AuCl 4 − occur. Using The method described is a new way of quantifying Au(III) ions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 185
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 121492232
- Full Text :
- https://doi.org/10.1016/j.jlumin.2017.01.014