期刊
NEW JOURNAL OF CHEMISTRY
卷 39, 期 9, 页码 7086-7096出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj01228g
关键词
-
资金
- University Grants Commission (UGC), New Delhi [41-217/2012 (SR)]
- Department of Science and Technology (DST), New Delhi
- UGC New Delhi
Based on curcumin nanoparticles (CURNPs) in the aqueous system a fluorescent nanosensor was prepared by a simple reprecipitation method and characterized. It can display off-type fluorescence with high selectivity toward Cu2+ among other metal ions in aqueous solution having an excellent detection limit. Furthermore, the in situ generated CURNPs-Cu2+ ensemble could recover the quenched fluorescence upon the addition of S2- resulting in an on-type sensing with a detection limit in the nanogram range in the same medium, which overcomes the detection limit of the method reported in the literature. No interference was observed from other anions, making it a highly sensitive and selective sulfide probe. The fluorescence lifetime, particle size and zeta potential studies of CURNPs with and without Cu2+ and S2- helped to propose a suitable mechanism of fluorescence 'off-on' of nanoparticles by Cu2+ and S2-. In addition, the stoichiometry and binding ability of CURNPs during complexation with Cu2+ was estimated by Job's, Hill's and Benesi-Hildebrand plots. The fluorescence 'off-on' results are used further to develop analytical methods for estimation of Cu2+ and S2- ions from environmental water samples without any interference.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据