Synthesis, crystal structure and photoluminescence of a binuclear rhenium(I) carbonyl complex incorporated in a framework of a distorted salophen ligand

Abstract

Re(CO)(5)Cl reacts with salophenH(2) to yield Re(I)(2)(salophenH)(CO)(6)Cl. A crystal structure determination has shown that this binuclear complex contains two Re(CO)(3) fragments which are bridged by a chloride and a heavily constrained salophenH(-) anion as ligands. Under ambient conditions in solution and in the solid state, the complex displays an orange emission which originates from the lowest-energy IL/MLCT triplet. In solution, this phosphorescence is completely quenched by oxygen.