Visible-light photocatalysis promoted by solid- and liquid-phase immobilized transition metal complexes in organic synthesis

This review summarizes synthetic approaches to reusable photocatalytic systems based on visible light-active transition metal complexes with chelating ligands containing pyridyl residues such as 2,2?-bipyridines, 1,10-phenanthrolines, 2,2?:6?,2??-terpyridines and related ligands. The use of these materials in organic synthesis is then discussed focusing 1) most active exhibiting a synergy effect between photophysical properties immobilized photoactive solid supports 2) reusability the developed catalytic system.