The Study of Gd~(3+) Complexation with 4-Dihydroxyboropenylalanine in Aqueous Solutions

摘要

The process of Gd~(3+) complexation with 4-dihydroxyborophenylalanine (DHBPA) in aqueous solutions was studied by the contact conductometry, IR, and X-ray photoelectronic spectroscopy methods. The complex formation reactions of Gd~(3+) with DHBPA were found to occur in steps, depending on the metal: ligand ratio. In the final reaction product, i.e., the chelate complex [Gd(DHBPA)3], each molecule of a ligand occupies two coordination sites.