Syntheses and characterization of porphyrins and their zinc complexes appending a multi-dentate ligand

摘要

Porphyrins with a multi-dentate ligand have been prepared by a covalent binding of nitrilotriacetic acid (NTA) to meso-mono (ortho- or para-aminophenyl)-triphenylporphyrin. The equilibrium between the porphyrins and Zn~(2+) has been analyzed by ultra violet-visible (UV-Vis) and ~1 H NMR spectroscopies and the porphyrins are found to form complexes with porphyrin/zinc ratios of 1:1 and 1:2. The zinc complexes with the porphyrin/zinc ratios of 1:1 and 1:2 have been prepared and characterized by UV-Vis, infrared (IR) and ~1H NMR spectroscopies. An accelerated zinc incorporation reaction into the porphyrin appending NTA at its ortho-phenyl group is reported.