Interactions of polymer-small molecule complex with cupric (II) ions in aqueous ethanol solution

被引:66
作者
Acar, N [1 ]
Tulun, T [1 ]
机构
[1] Istanbul Tech Univ, Dept Chem, Fac Sci & Letters, TR-80626 Istanbul, Turkey
关键词
polymer-metal complexes; poly(4-vinylpyridine); 4-amino benzoic acid; hydrogen bonding; stability constants; potentiometry;
D O I
10.1016/S0014-3057(01)00026-X
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A complex was prepared by mixing ethanol solutions of poly(4-vinyl pyridine) (P4VP) and 4-amino benzoic acid. The complex (PEC) formation was studied by C-13 NMR, IR spectroscopy, differential scanning calorimetry and potentiometry. It was found that hydrogen bond is formed between P4VP and 4-amino benzoic acid. Dissolution was assessed visually at room temperature using dimethyl formamide, dimethyl sulfoxide, methanol, ethanol, ethanol-water. After dissolution of PEC in aqueous-ethanol (50% v/v) solution, the interaction of PEC with Cu2+ ions has been investigated by potentiometric titration. The average number of ligands coordinated with the central metal ion and the stability constants of PEC-metal complex were determined. (C) 2001 Elsevier Science Ltd. All rights reserved.
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页码:1599 / 1605
页数:7
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