Coordination abilities of amino-phosphonate derivatives of pyridine

Potentiometric and spectroscopic methods were used to evaluate the binding ability of the series of amino-phosphonates containing pyridine as a side-chain. The involvement of pyridine nitrogen in the Cu(II) binding results in very effective chelation of the metal ion. The binding ability of some pyridine-containing ligands is comparable to powerful imidazole amino-phosphonates.