Water-Soluble Metal–Polymer Gallium Complexes with N-Vinylpyrrolidone–N-Vinylformamide–N-Vinyliminodiacetic Acid Terpolymer

Abstract

A terpolymer with a molecular weight of 45 kDa containing 7 mol % of vinylamine units, 80 mol % of vinylpyrrolidone, and 3 mol % of vinyliminodiacetic acid units has been synthesized. Its complexation with Ga³⁺ ion has been studied by HPLC. The resulting metal–polymer complex has been characterized by exclusion chromatography and spectral (IR, ¹H NMR) data. The complex has a monomolecular structure where the metal ion acts as an anchor fragment between vinyliminodiacetic acid units and is stable in the reaction of interligand exchange with histidine.