Work from the Kurtz group at the University of Texas at San Antonio published in Biochemistry described the process by which Zn(II) protoporphyrin IX (ZnPP) complexes were generated and loaded with iron to determine both the photophysical and photochemical properties of the complex. The X-ray crystal structures obtained depicted a six-coordinate zinc in the ZnPP complexes with two axial methionine sulfur ligands. When the iron loaded complex was irradiated with light overlapping the Soret peak absorption, oxidation occurred to produce a cation radical of the ZnPP complex. Thanks for using our Zn(II) protoporphyrin IX, Zn625-9.
