Journal
ORGANIC LETTERS
Volume 11, Issue 15, Pages 3454-3457Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol901380w
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Funding
- Chinese Academy of Sciences
- National Natural Science Foundation of China [90813002]
- State Key Laboratory of Fine Chemicals, Department of Chemical Engineering, Dalian University of Technology
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A fluorescent sensor QB, based on quinoline with DPA as receptor, is designed as a ratiometric sensor for Zn2+ and CHEF (chalation enhanced fluorescence) sensor for Cd2+. Moreover, another ratiometric signal output for Cd2+ can be observed when the bound Zn2+ in the QB-Zn2+ complex is displaced by Cd2+. These results demonstrate that OB can act not only as a ratiometirc sensor for Zn2+ but also as a dual-mode Cd2+-selective sensor via the CHEF mechanism and ratiometric displacement.
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