Phosphorescent cyclometalated Ir(iii) complexes comprising chelating thiolate ligands as pH-activatable sensors

Abstract

A series of cyclometalated Ir(III) complexes possessing the general formula of [Ir(pqe)2(S^N)], pqe = 2-phenyl-quinoline-4-carboxylic acid methyl ester, S^N = pyridine-2-thiolate (Spy, B1); pyrimidine-2-thiolate (SpyN, B2); 5-(trifluoromethyl)-pyridine-2-thiolate (SpyCF3, B3); 2-thiazoline-2-thiolate...

Structural Diversity in Cyclometalated Diiridium(III) Complexes with Bridging syn and anti μ2‐Oxamidato and μ2‐Dithioxamidato Ligands

“…Cyclometalated Ir(III) complexes continue to attract great attention due to their facile chemical modifications, readily tunable photophysical and structural properties, and their high stability. [1][2][3][4][5][6][7][8][9][10] In contrast to the extensive development of monoiridium complexes that followed the initial work by Watts and co-workers in the 1980s, [11] diiridium complexes have been largely neglected, although the bridging ligand can impart additional interesting structural and electronic variations compared to monoiridium systems. [12,13] Diiridium complexes are often obtained as a mixture of diastereomers, which are generally not separated.…”