title: Multisignaling detection of Hg2+ based on a phosphorescent iridium(III) complex.
abstract: 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.
authors.affiliation: Department of Chemistry & Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, PR China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.forename: Shujuan
authors.initials: S
authors.lastname: Liu
authors.forename: Fuyou
authors.initials: F
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Yi
authors.forename: Chunhui
authors.initials: C
authors.lastname: Huang
mesh_terms: 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
chemical_list: D009942:Organometallic Compounds; D007495:Iridium; D008628:Mercury