期刊
TETRAHEDRON
卷 67, 期 18, 页码 3181-3186出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2011.03.024
关键词
Silver ion; Mercury ion; Click reaction; Fluorescent sensor; Ratiometric detection
资金
- National Natural Science Foundation of China [20832001, 20972065, 21074054]
- National Basic Research Program of China [2007CB925103, 2010CB923303]
A novel BINOL-pyrene derivative sensor 1 for Ag+ and Hg2+ incorporating the triazole moieties and pyrenes was synthesized via click reaction. Binding of Ag+ ion induces the formation of 1:1 Ag+-1 chelating complex, and occurs in a ratiometric manner through an enhanced monomer and declining excimer emission, which make it possible to ratiometrically detect Ag+. The competitive experiment shows 1 can be used as an Ag+ specific fluorescence sensor over a wide range of competing cations. In the meanwhile, the sensor 1 was found to be selectively quenched by only Hg2+ at both monomer and excimer emission. Furthermore, we obtained evidences for different fluorescence signaling behaviors with Ag+ and Hg2+ by H-1 NMR titration experiments. (C) 2011 Elsevier Ltd. All rights reserved.
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