title: Phosphorescent iridium(III) complex with an N^O ligand as a Hg(2+)-selective chemodosimeter and logic gate.
abstract: Phosphorescent iridium(III) complexes have been attracting increasing attention in applications as luminescent chemosensors. However, no instance of an iridium(III) complex being used as a molecular logic gate has hitherto been reported. In the present study, two iridium(III) complexes, [Ir(ppy)(2)(PBT)] and [Ir(ppy)(2)(PBO)], have been synthesized (PBT, 2-(2-Hydroxyphenyl)-benzothiazole; PBO, 2-(2-hydroxyphenyl)-benzoxazole), and their chemical structures have been characterized by single-crystal X-ray analysis. Theoretical calculations and detailed studies of the photophysical and electrochemical properties of these two complexes have shown that the N^O ligands dominate their luminescence emission properties. Moreover, [Ir(ppy)(2)(PBT)], containing a sulfur atom in the N^O ligand, can serve as a highly selective chemodosimeter for Hg(2+) with ratiometric and naked-eye detection, which is associated with the dissociation of the N^O ligand PBT from the complex. Furthermore, complex [Ir(ppy)(2)(PBT)] has been further developed as an AND and INHIBIT logic gate with Hg(2+) and histidine as inputs.
authors.affiliation: Department of Chemistry, Fudan University , Shanghai, 200433, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Meiyi
authors.initials: M
authors.lastname: Li
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.forename: Huazhou
authors.initials: H
authors.lastname: Wu
authors.forename: Kewei
authors.initials: K
authors.lastname: Huang
authors.forename: Fuyou
authors.initials: F
authors.lastname: Li