Synthetic and Oxidation Studies of Ruthenium(II) Phthalocyanine Complexes
David Dolphin, James, B.R., Murray, A.J., and Thornback, J.R.
Can. J. Chem.
Complexes of the type RuPcL2 (PcH2 = phthalocyanine; L = DMF, Me2SO, MeCN, various pyridines, imidazole) may be prepared generally in solution by photolysis of RuPc(CO)L' complexes in the presence of excess L (L' may be the same as L or may be a different ligand), and in some cases as solids by extraction of crude RuPc with L. The solid RuPc(CO)L monocarbonyls can be formed from reaction of the RuPcL2 complexes with CO, as well as via an extraction procedure using L with crude RuPc(CO) formed from Ru3(CO)12 and H2Pc. Chemical or electrochemical oxidation of the RuPcL2 or monocarbonyl complexes generates a cationic Ru(II) phthalocyanine radical species and not Ru(III), as evidenced by ESR and visible spectroscopy.