Magnetic and Spectroscopic Methods for Structural Characterization of Paramagnetic Hematoporphyrin IX Complex With Cu(II)
Keywords:
hematoporhyrin IX, metalloporphyrin of Cu(II), EPR studies, IR, UV-Vis spectraAbstract
A paramagnetic metaloporphyrin type complex [Cu(II)(Hp-2H)].2H2O has been obtained
during the reaction of Cu(II) and hematoporphyrin IX ((7,12-bis(1-hydroxyethyl)-3,8,13,17-
tetramethyl-21H-23H-porphyn-2,18-dipropionic acid) - Hp, I) in alkaline aqueous medium. The
solution and solid state structure of the complex were studied through UV-Vis, IR and EPR
spectroscopic methods. The applied simulation procedure using the parameters from the
experimental EPR spectrum proved the square planar structure of the complex with symmetrical
coordination of the porphyrin ligand to Cu(II) via the four pyrrole N-atoms in the porphyrin
macrocycle.