[Analytical Sciences]A Selective, Colorimetric and Ratiometric Chemosensor for Hg2+ and Its Application as Test Papers
writer：H. W. Zhou,* W. Tian, J. Min, P. Li, S. H. Zeng, W. X. Chen, A. J. Ma
keywords：Chemosensor, coumarin, mercury, ratiometric, colorimetric
source：期刊
specific source：Analytical Sciences
Issue time：2015年
Chemosensors provide an efficient and low-cost approach to the detection of various metal ions and small molecules. In the present work, we present a detailed investigation of a simple, easily-prepared, yet efficient, coumarin-based sensor for Hg2+. The sensor is based on a fluorescent group of coumarin. When exposed to Hg2+,the sensor solution shows a significant color change from yellow to red, and a fluorescence change from green to orange. Further study revealed that the sensor responds solely to Hg2+,and shows excellent selectivity even in the presence of other potential competition metal ions, including Na+, K+, Co2+,Fe2+,Cd2+ , Cu2+ , Ni2+ , Ag+, Zn2+ , Mg2+ , Mn2+,Pb2+,Fe3+.Furthermore, the sensor has een successfully applied to detect Hg2+in a form of test paper, which may promote easy and effective application of the sensor.