Novel Uracil Based Chemosensor for Detection of Mercury in Real Water, Soil Samples and Food Materials
摘要
An effective recognition system for determination of mercury has been proposed using a combination of uracil and an aromatic aldehye. A chemosensor (1) possessing uracil has been synthesized at room temperature. When Hg2+ ions were added gradually to the aqueous solution of chemosensor (1), the absorption spectrum showed a continuous decrease in the peak at 410 nm, accompanied by a slight red shift to 414 nm. Also, in fluorescence spectral studies of chemosensor (1) with the integration of different metal ions, emission intensity was increased only with Hg2+ ions. In the presence of other metal ions such as Pb2+, Cu2+, Na2+, Cd2+, chemosensor (1) displayed a high level of specificity and selectivity for Hg2+ ions. Additionally, it was demonstrated for the detection of Hg2+ ions across various food samples such as turmeric, lemon, tomato and rice as well as water samples like river water, lake water and tap water. This chemosensor (1), hence, featured high sensitivity, real-time detection, multiplexing capability, ruggedness, and portability, suggesting its potential use as an on-site Hg2+ probe.