The complexing properties of modified silica with 4-(2-pyridylazo)resorcinol covalently immobilized by the Mannich reaction
are studied with respect to heavy metals. This adsorbent can be used for the preconcentration of heavy metal ions due to its
satisfactory kinetic characteristics. The structures of the heavy metal complexes with 4-(2-pyridylazo)resorcinol immobilized
on the silica gel surface are studied by ESR and diffuse reflectance spectroscopy.
Original Russian Text © E.S. Yanovskaya, V.A. Kuzovenko, V.A. Tertykh, O.Yu. Kichkiruk, 2007, published in Koordinatsionnaya
Khimiya, 2007, Vol. 33, No. 8, pp. 627–631.