Quantum yields of singlet oxygen of metal complexes of meso-tetrakis(sulphonatophenyl) porphine

The iodide method and the method of bleaching of p-nitroso-N,N′-dimethylaniline (RNO) were used to measure the quantum yields of singlet oxygen from the tetrasodium salt of meso-tetrakis(4-sulphonatophenyl) porphine (H2TPPS4) and its water-soluble metal complexes with divalent metals, Ag(II)TPPS4, Cd(II)TPPS4, Co(II)TPPS4, Cu(II)TPPS4, Mg(II)TPPS4, Ni(II)TPPS4, Pd(II)TPPS4, Pt(II)TPPS4 and Zn(II)TPPS4.