Journal
JOURNAL OF FLUORESCENCE
Volume 23, Issue 6, Pages 1313-1318Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-013-1265-z
Keywords
Nitrite; Gold nanocluster; Bovine serum albumin; Water samples
Funding
- Natural Science Foundation of China [21005036, 20875042, 21075058, 21127006]
- Natural Science Foundation [ZR2010BZ004, JQ201106]
- Research Fund of Shandong Academy of Agricultural Sciences
- Doctoral Fund of Liaocheng University
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In the present work, gold nanocluster (GNC) induced by bovine serum albumin (BSA) was synthesized as a novel fluorescence probe to detect nitrite (NO2 (-)) sensitively and selectively. The fluorescence of GNC was found to be quenched effectively by NO2 (-). Under the optimum conditions, it was found that the change of fluorescence intensity was proportional with the concentration of NO2 (-) in the linear range of 0.1-50 mu M (R = 0.9990), with a detection limit (S/N = 3) of 30 nM. The absorption spectroscopy, circular dichroism (CD), and X-ray photoelectron spectroscopy (XPS) studies were employed to discuss the quenching mechanism. In addition, the present approach was successfully applied in real water samples.
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