期刊
ANALYST
卷 137, 期 10, 页码 2394-2399出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an35068h
关键词
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资金
- National Natural Science Foundation of China [21075018]
- Program for New Century Excellent Talents in Chinese University [NCET-10-0019]
- Natural Science Funds for Distinguished Young Scholar of Fujian Province, China [2009J06003]
Recently, metal-selective fluorescent chemosensors have attracted intense attention for their simple and real-time tracking of metal ions in environmental samples. However, most of the existing fluorescent sensors are one-off sensors and thus suffer from large amount of reagent consumption, significant experimental cost and raising the risk of environmental pollution. In this paper, we developed a green (low reagent consumption, low-toxicity reagent use), recyclable, and visual sensor for Cu2+ in aqueous solution by using a fluorescent gold nanoclusters membrane (FGM) as the sensing unit, basing on our findings on gold nanoclusters (Au NCs) that the bovine serum albumin (BSA)-coated Au NCs exhibit excellent membrane-forming ability under the isoelectric point of BSA, and thus enable us to obtain a new type of sensing membrane (i.e. FGM) by denaturing Au NCs; the fluorescence of FGM can be significantly quenched by Cu2+ ion, and the quenched fluorescence can be totally recovered by histidine; the as-prepared FGM is very stable and recyclable, which makes it an ideal sensing material.
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