Cyclometalated Ir(III) Complex as a Metalloligand and a Selective Cu(II) Sensor: Synthesis and Structural Characterization of a Heterometallic Tetranuclear Ir(III)/Cu(II) Complex.

ABSTRACT: A cyclometalated Ir(III) complex, [Ir(ppy)₂(LH)] (2) [LH₂ = 1,2-bis(pyridine-2-carboxamido)benzene; ppyH = 2-phenylpyridine] was synthesized and structurally characterized. [Ir(ppy)₂(LH)] contains free donor sites and functions as a metalloligand. Accordingly, it interacts with a Cu(II) salt to afford the heterometallic tetranuclear complex, [{Ir(ppy)₂(L)}₂{Cu₂Cl₂}] (3). In the latter, a Cu₂Cl₂ dimer bridges the two cyclometalated Ir(III) units, resulting in a Ir^III-Cu^II-Cu^II-Ir^III motif. 2 also functions as a selective and reversible sensor for Cu²⁺, as revealed by quenching of its emission and subsequent revival of

SUBMITTER: Chandrasekhar V 

PROVIDER: S-EPMC6641452 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature