Hydration and interfacial activity of methyl 8-pyridyloctanoates and extraction of copper(II) from chloride solutions

被引：15

作者：

Bogacki, MB

Jakubiak, A

Prochaska, K

Szymanowski, J

机构：

[1] Inst. of Chem. Technol. and Eng., Poznań Univ. of Technology, 60-965 Poznań

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1996年 / 110卷 / 03期

关键词：

chloride solutions; copper extraction; interfacial tension; methyl; 8-pyridyloctanoates;

D O I：

10.1016/0927-7757(95)03445-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The interfacial tension of individual methyl 8-pyridyloctanoates containing the hydrophobic group at different positions of the pyridine ring was measured at the tolune/water interface. The extraction of copper(II) fom chloride solutions with these reagents was studied. Considering solvent extraction, methyl 8-(2-pyridyl)octanoate had a worse orientation at the interface than methyl 8-(3-pyridyl)octanoate and methyl 8-(4-pyridyl)octanoate. PM3 semiempirical quantum chemical computing indicates that the oxygen of the carbonyl group forms hydrogen bonds with water molecules more easily than the second oxygen atom and the nitrogen in the pyridine ring. However, at the adsorption layer, this hydration is possible only for methyl 8-(2-pyridyl)octanoate. Methyl 8-(3-pyridyl)octanoate and methyl 8-(4-pyridyl)octanoate are strong copper extractants from chloride solutions, while extraction is not observed for methyl 8-(2-pyridyl)octanoate.

引用

页码：263 / 272

页数：10

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