Nacdc = sodium carbazole dithiocarbamate) was realized. The photograph of Ir(pqz)2(cdc) under ultraviolet light exhibited emitting color change from red to yellow without and with Hg 2+ in acetonitrile(MeCN) solution, and it can also serve as a highly selective chemosensor for Hg 2+ with naked-eye detection. Upon addition of tetrahydrofuran(THF) solution of Hg 2+ , the dichloromethane (DCM) solution of Ir(pqz)2(cdc) gave a visual color change and significant luminescent quenching. When MeCN was added, a new emission peak at 562 nm emerged, which constituted a selective MeCN phosphorescent chemosensor.

Different types of fluorescent probes for Hg2+ based on the 5-thiophen-2-yl-benzothiazole derivatives (TBT, CTBT, DTBT and NTBT) were realized by changing the subsituents, including the fluorescence quenching probe, the fluorescence enhancement probe and the ratiometric fluorescent probe.

A novel iridium(iii) complex Ir(dpp)2(dta) with diethyldithiocarbamate (S^S) as the ancillary ligand was synthesized and characterized. The polymer organic light-emitting device based on Ir(dpp)2(dta) has been fabricated.