The effect of alkylating agent on the efficiency and selectivity of new polymeric anion exchangersстатья

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[1] The effect of alkylating agent on the efficiency and selectivity of new polymeric anion exchangers / A. V. Zatirakha, A. D. Smolenkov, I. A. D’yachkov, O. A. Shpigun // Moscow University Chemistry Bulletin. — 2011. — Vol. 66, no. 5. — P. 309–314. New anion exchangers for ion chromatography with functional groups of trimethylammonium and 3-chloro-2-hydroxypropyl-N,N-dimethylammonium were obtained. The synthesis included consecutive acetylation of a styrene-divinylbenzene copolymer containing 25% divinylbenzene, reductive amination of carbonyl groups, and subsequent alkylation. Iodomethane and epichlorohydrin were used as alkylating agents. The chromatographic properties of anion exchangers were studied by means of suppressed ion chromatography with conductometric detection. Anion exchangers with the 3-chloro-2-hydroxypropyl-N,N-dimethylammonium group are characterized by better selectivity and higher efficiency for polarizable nitrate and bromide ions, as well as for nonpolarizable chloride, fluoride, nitrite, phosphate, and sulfate ions, compared to those of sorbents with the trimethylammonium group. © 2011 Allerton Press, Inc. [ DOI ]

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