Ion-chromatographic selectivity of polyelectrolyte sorbents based on some aliphatic and aromatic ionenes

A. V. Pirogov, O. V. Krokhin, M. M. Platonov, Ya. I. Deryugina, O. A. Shpigun

Journal of Chromatography A, 2000, 884(1-2), 31-39

ABSTRACT. Aliphatic ionene with hydroxyl group (2HP-8 ionene), mixed aliphatic-aromatic ionenes (3-Х and 6-Х-ionenes), aromatic ionene (Ph-Х ionene), and viologen (Dp-Х ionene) -polymers with quaternary nitrogen atoms in the main chain - served as modifiers in synthesising polyelectrolyte sorbents for ion chromatography. The selectivity these anion-exchangers was compared with those for aliphatic ionenes. It was found that aromatic ionenes having a rigid structure of polymer chains are similar to their aliphatic analogues with shorter chains with a high charge density. Polyelectrolyte sorbents based on aromatic ionenes show higher selectivity to aromatic acids (e.g. 1-naphthalenesulfonic acid) to compare with aliphatic ionenes due to specific pi-pi interactions.

Laboratory of Chromatography