Xiangyong Wang, Jingjing Zhao, Chaoxia Guo
Mar 31, 2014
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0
Influential Citations
31
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Journal
Sensors and Actuators B-chemical
Abstract
Abstract Two new water-soluble hydrazide-based fluorescent probes of poly 3-{[1-(2-hydrazino-2-oxoethyl)piperidin-4-ylidene]methyl}thiophene hydrochloride ( PM1 · HCl ) and poly 3-{[1-(3-hydrazino-3-oxopropyl)piperidin-4-ylidene]methyl}thiophene hydrochloride ( PM2 · HCl ) have been designed and synthesized. PM1 · HCl selectively recognizes Cu 2+ and Hg 2+ in aqueous solution with different emission characteristics (blue-shifted for Cu 2+ and red-shifted for Hg 2+ ) and color changes, and the color response of the sensory materials can be tuned for detection with the naked eye. Detection limits of sensor PM1 · HCl for Cu 2+ and Hg 2+ were estimated to be 2.0 × 10 −10 M and 2.0 × 10 −9 M, respectively. Fluorescence sensor PM2 · HCl also showed high sensitivity toward Cu 2+ in aqueous media, and the detection limit was measured to be as low as 2.0 × 10 −10 M. Upon addition of Hg 2+ to the PM2 · HCl aqueous solution, no significant changes of the fluorescence spectra were observed.