期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 26, 页码 7276-7281出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201003275
关键词
azo compounds; charge transfer; colorimetry; mercury; sensors
资金
- National Natural Science Foundation of China [20974084, 21075134]
- Program of NCET [NCET-08-0411]
- National Fundamental Key Research Program [2011CB932702]
Two new highly selective colorimetric chemosensors for Hg2+, based on azobenzene and highly selective Hg2+-promoted deprotection of a dithioacetal have been designed and synthesized. In the presence of as little as 20 mu m Hg2+, the sensors change their color from light yellow to deep red, which can easily be observed by the naked eye. The underlying signaling mechanism is intramolecular charge transfer (ICT). The sensors have good selectivity for Hg2+ with respect to several common alkali, alkaline earth, and transition metal ions. Furthermore, they can be used for in-the-field measurements by virtue of a dipstick approach without any additional equipment.
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