SEARCH Articles Figures Tables A-2 Porphyrin Ligands porphyrin Ligands, in complexes Metal complexes ligand Metal porphyrins Metal, as ligands Porphyrin complexes Porphyrin metallation Porphyrin-metal complexes Porphyrinic metal complex Porphyrins and Porphyrins as Ligands Porphyrins complexes and Porphyrins ligand complexes Tetraazaporphyrin Tetraazaporphyrines Tetraazaporphyrins