Multisignaling detection of Hg2+ based on a phosphorescent iridium(III) complex.
A multisignaling chemosensor for Hg(2+) based on the iridium(III) complex Ir(thq)(2)(acac) was realized through UV-Vis absorption, phosphorescent emission and electrochemical measurements. Upon addition of Hg(2+), an obvious blue-shift in absorption spectra and a strong decrease of emission intensity were measured for Ir(thq)(2)(acac), which could be observed by the naked eye. Hg(2+) is coordinated to Ir(thq)(2)(acac), forming a 1 : 1 complex. Because Hg(2+) is a thiophilic metal ion, the interaction between Hg(2+) and the sulfur atom of cyclometalated ligands is responsible for the significant variations in optical and electrochemical signals.
Zhao
Qiang
Q
Department of Chemistry & Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, PR China.
Liu
Shujuan
S
Li
Fuyou
F
Yi
Tao
T
Huang
Chunhui
C
D004563:Electrochemistry; D007495:Iridium / Q000737:chemistry*; D008163:Luminescent Measurements; D008628:Mercury / Q000032:analysis* / Q000737:chemistry; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
D009942:Organometallic Compounds; D007495:Iridium; D008628:Mercury