New fluorescent dye chemosensor for mercury ion (Hg²⁺) detection

The dye chemosensor for mercury ion detection was designed, which was based on donor-acceptor intramolecular charge transfer system and the corresponding fluorescence changing property was successfully monitored. This new dye chemosensor was containing dimethylcarbamodithioate groups to coordinate Hg ²⁺, which showed very effective sensing functions. But it showed no significant changes upon the addition of other metal ions such as Ca ²⁺, Pb²⁺, Al³⁺, Ce²⁺, Ba ²⁺, Ni²⁺, Cd²⁺, Zn²⁺, and Mg ²⁺.