期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 8, 期 12, 页码 3015-3021出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201300791
关键词
acylhydrazone; cyanides; fluorescence; nucleophilic addition; sensors
资金
- National Natural Science Foundation of China (NSFC) [21064006, 21161018, 21262032]
- Natural Science Foundation of Gansu Province [1010RJZA018]
- Program for Changjiang Scholars and innovative Research Team in University of Ministry of Education of China [IRT1177]
A highly selective chemosensor 1 based on an acylhydrazone group as binding site and naphthalene group as the fluorescence signal group were described, which could instantly detect CN- in water with specific selectivity and high sensitivity. The detection of cyanide was performed via the nucleophilic attack of cyanide anion on the carbonyl group, which could be confirmed by (HNMR)-H-1, (CNMR)-C-13, ESI-MS and DFT calculations. The addition of CN- to sensor 1 induced a remarkable color change from colorless to yellow and generated a blue fluorescence, these sense procedure could not interfered by other coexistent competitive anions (F-, Cl-, Br-, I-, AcO-, H2PO4-, HSO4-, ClO4-, SCN-, S2-, NO3- and SO42-). The detection limits were 5.0x10(-7)M and 2.0x10(-9)M of CN- using the visual fluorescent color changes and fluorescence spectra changes respectively, which is far lower than the WHO guideline of 1.9x10(-6)M. Test strips based on sensor 1 were fabricated, which could act as a convenient and efficient CN- test kit to detect CN- in pure water for in-the-field measurement.
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