Phenanthroline ligands are a class of organic ligands with two nitrogen atoms, which are widely used in metal coordination chemistry and catalytic reactions. Phenanthroline ligands play an important role in metal coordination chemistry and can improve the performance of metal catalysts through their coordination ability, electronic effect and stability. It is widely used in catalytic reactions, electron transfer, photocatalysis and other fields, and is an important ligand for the research and development of new catalysts.