Synthesis, characterization, photophysics and electrochemical study of luminescent iridium(iii) complexes with isocyanoborate ligands

Abstract

A new series of cyclometalated iridium(III) complexes with isocyanoborate ligands [Ir(R₂ppy)₂(L)(CNBR′₃)] (R = H or F; L = CNC₆H₄Cl-4 or PPh₃; R′ = Ph, C₆F₅ or C₆H₄Cl-4), [Ir(biqb)(ppy)(CNBR′′₃)] (R′′ = C₆F₅ or C₆H₄Cl-4) and {Ir(ppy)₂(CN)_n[CNB(C₆F₅)₃]_2−n}⁻ (n = 0 or 1) have been synthesized and characterized. Three of these complexes have also been structurally characterized by X-ray crystallography. The photophysical and electrochemical properties of these complexes have been investigated. The effects of isocyanoborate ligands on the luminescence properties of these iridium(III) complexes are also described.