Journal
MICROCHIMICA ACTA
Volume 180, Issue 13-14, Pages 1287-1293Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-013-1045-0
Keywords
Polyinosinic acid; Polycytidylic acid; Silver nanoclusters; Mercury ion
Categories
Funding
- NSFC [20905021, 21175118, 21275130, 21275131]
- Foundation of the Ministry of Education of China for Returned Scholars
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Water-soluble fluorescent silver nanoclusters (Ag NCs) were prepared with the assistance of commercially available polyinosinic acid (PI) or polycytidylic acid (PC). The fluorescence of the Ag NCs is effectively quenched by trace mercury(II) ions, which can be applied for their detection. The response of the Ag NCs prepared with PI to Hg(II) ion is linear in the Hg(II) concentration range from 0.05 to 1.0 mu M (R-2 = 0.9873), and from 0.5 to 10 mu M of Hg(II) (R-2 = 0.9971) for Ag NCs prepared with PC. The detection limits are 3.0 nM and 9.0 nM (at an S/N of 3), respectively. The method is simple, sensitive and fairly selective.
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