SEARCH Articles Figures Tables Manganese tetra porphyrin Palladium tetra porphyrin Poly-tetra- porphyrin Porphyrin meso-tetra series Tetra phenyl-porphyrin Tetra porphyrin iron Tetra porphyrin ligand Tetra porphyrins structure Tetra-carboxyphenyl porphyrin Tetra-pyridyl-porphyrin Tetra-spirobifluorenyl-porphyrin Tetra-substituted porphyrins