
Keywords: 2،2'-بپییریدین; bpy; 2,2â²-bipyridine; dppcb; cis,trans,cis-1,2,3,4-tetrakis-(diphenylphosphanyl)cyclobutane; dppen; cis-1,2-bis-(diphenylphosphanyl)ethene; MLCT; metal to ligand charge transfer; NMR; Nuclear Magnetic Resonance; UV/vis; ultraviolet/visible light; Solar