Synthesis of heteroleptic Cu(I) complexes based on quinolin-yl-1H-1,2,3-triazole

In this work, three mononuclear and five binuclear heteroleptic copper(I) complexes based on quinolin-yl-1H-1,2,3-triazole as diimine chelating ligand and DPEPhos as chelating diphosphine were successful synthesised, these compounds may be good alternative to more expensive photosensitizer based on ruthenium complexes. They show good absorption in visible region and good luminescence in solution at room temperature with long-lived excited states. The most promising complexes, which show adequate photophysical characteristics, such as high PLQY and long-lived luminescence lifetimes will be used to prove their activity in the photocatalytic reduction of CO2.