期刊
TETRAHEDRON LETTERS
卷 54, 期 9, 页码 1125-1128出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.12.054
关键词
Fluorescent probe; Zinc ion; Cadmium ion; Quinoline
资金
- NSFC [21102002, 21272223]
- Natural Science Foundation of Education Department of Anhui Provience [KJ2010A028]
- 211 Project of Anhui University
A new quinoline based fluorescent probe (DQ) for Zn2+ and Cd2+ has been designed and synthesized. The new probe shows quite different fluorescence response to Zn2+ and Cd2+ in aqueous solution. IR and NMR spectra demonstrated that the different response is caused by amide tautomerization of the probe molecule when coordinating with Zn2+ and Cd2+. The dissociation constants of Zn2+ and Cd2+ complex were detected to be 3.36 and 30.62 nM, respectively. Other metal ions have no effect on the fluorescence spectrum of the probe. Thus the new probe can detect Zn2+ and Cd2+ in water with high selectivity and sensitivity. (C) 2012 Elsevier Ltd. All rights reserved.
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