期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 160, 期 1, 页码 656-661出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.08.044
关键词
Fluorescent organic nanoparticles; Turn-on; Sensor; Ag+; Cysteine
资金
- National Natural Science Foundation of China [20772038]
- 863 program [2009AA 06A 417]
- Program for Excellent Research Group of Hubei Province [2009CDA048]
- MOE [CCNU09AO200]
Fluorescent organic nanoparticles (FONs) have received considerable attention in the past few years, since the material holds great flexibility in materials synthesis and optical properties. In this study, we report a novel Ag+-selective turn-on fluorescent chemosensor based on the triazolo-thiadiazole (TTD) FONs, which show a significant fluorescence enhancement to silver ions among fourteen metal ions due to the formation of Ag-FONs cation complex, and also exhibit a lowest detectable concentration of 2.87 x 10(-9) M. Upon the addition of Cysteine (Cys), a thiol-containing amino acid, the fluorescence intensity of the colloidal solution decreases significantly with a limit detection concentration of 2.58 x 10(-7) M, indicating that Cys can form the Ag-Cys complex. Thus FONs are a potential primary sensor toward Ag+ and a secondary sensor toward Cys. The method is a basis for further two-component recognition study of TTD FONs. The possible mechanism is also discussed. (C) 2011 Elsevier B.V. All rights reserved.
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