Aggregation-induced emission of cyclometalated rhodium(iii) and iridium(iii) phenylpyridine complexes with ancillary 1,3-diketones

Abstract

In the solid state, a simple bis-cyclometalated rhodium(iii) complex with 2-phenylpyridine and ancillary benzoyltrifluoroacetone demonstrates enhanced phosphorescence emission compared to a practically non-emissive analogous iridium(iii) complex.

N^N^C-Cyclometalated rhodium(iii) complexes with isomeric pyrimidine-based ligands: unveiling the impact of isomerism on structural motifs, luminescence and cytotoxicity

“…In this manuscript we focus on the investigation of the coordination behaviour of HL 2,5 and HL 2,6 toward rhodium(III) chloride and on unveiling the impact of isomerism on structures and properties. Our particular interest to rhodium complexes stems partly from our experience in rhodium chemistry [82][83][84] and partly from appealing properties this metal shows in the C-H bond activation and catalysis, [85][86][87][88][89][90][91] photochemistry [92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107] and bioinorganic chemistry. Along with the synthesis of HL 2,5 and HL 2,6 and their rhodium(III) complexes [RhL 2,5 (Solv)Cl 2 ]•nEtOH and [RhL 2,6 (Solv)Cl 2 ]•nEtOH, here we report the impact of isomerism on molecular and supramolecular structures of these compounds, on the photophysical properties of the rhodium(III) complexes and on the cytotoxic activity of the ligands and complexes.…”