期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 203, 期 -, 页码 712-718出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.07.046
关键词
Chemosensor; Ratiometric; Pyrene; Excimer; Cr3+
资金
- National Natural Science Foundation of China [21005068]
- China Postdoctoral Science Foundation [2014M552140]
- Hunan Provincial Natural Science Foundation of China [11JJ3023, 13JJ6039, 12JJ7002]
- Scientific and Technological Plan Project of Hunan Province [2012FJ4304]
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education [10HJYH08]
- Hunan Provincial Education Department [11C1204, 12C0393]
A pyrene compound (1) containing piperazine was synthesized and used as ratiometric fluorescent chemosensor to recognize Cr3+. The ratiometric fluorescent signal change of the chemosensor is on the basis of monomer-excimer conversion of 1 induced by Cr3+. As far as we know, it is the first ratiometric chemosensor based on pyrene that is developed for Cr3+. The analytical performance characteristics of the proposed Cr3+-sensitive chemosensor were investigated. The chemosensor can be applied to the quantification of Cr3+ with a linear range covering from 2.0 x 10(-7) to 1.0 x 10(-5) M with the detection limit is 4 x 10(-8) M. The experiment results show that the response behavior of 1 towards Cr3+ is pH independent in medium condition (pH 6.0-8.0). Most importantly, the fluorescence changes of the chemosensor are remarkably specific for Cr3+ in the presence of other metal ions, which meet the selective requirements for practical application. Moreover, the response of the chemosensor toward Cr3+ is fast (response time less than 2 min). In addition, the chemosensor has been used for determination of Cr3+ in real sample such as river and pond water with satisfactory results. (C) 2014 Elsevier B.V. All rights reserved.
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