Synthesis of C-glycosyl triazolyl quinoline-based fluorescent sensors for the detection of mercury ions.

A series of novel C-glycosyl triazolyl quinoline-based fluorescent sensors have been synthesized via click chemistry. It was found that novel sensors exhibited good selectivity for Hg(2+) over many other metal ions. The glucose framework was introduced to increase the water-solubility of the fluorescent sensors and broaden its application for the detection of Hg(II) in the water-solubility biological systems. The mechanism of the chemodosimetric behavior of the sensors has been attributed to a binding mode of triazolyl quinoline with Hg(2+) which has been characterized by a number of spectroscopic techniques.