Design, synthesis and evaluation of diazadibenzocrown ethers as Pb2+ extractants and carriers in plasticized cellulose triacetate membranes

被引：44

作者：

Aguilar, JC

San Miguel, ERD

de Gyves, J

Bartsch, RA ^{[1
]}

Kim, M

机构：

[1] Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA

[2] Univ Nacl Autonoma Mexico, Dept Quim Analit, Fac Quim, Mexico City 04510, DF, Mexico

来源：

TALANTA | 2001年 / 54卷 / 06期

关键词：

D O I：

10.1016/S0039-9140(01)00387-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The ligands 4,7-diaza-2,3,8,9-dibenzo-15-crown-5 (L1), 4,10-diaza-2,3,11,12-dibenzo-18-crown-6 (L2), 4,10-diaza-2,3,1 1,12-di(4 ' -tert-butylbenzo)-18-crown-6 (L3) and N,N-di(methylenecarboxyethoxy) 4,10-diaza-2,3,11,12-dibenzo-18-crown-6 (L4) have been prepared. Partition coefficients and acid dissociation constants for these four diazadibenzocrown ether compounds were determined in water-chloroform. Their effectiveness was assessed in solvent extraction of Pb2+ from aqueous solutions into toluene. Ligands 1,3 and L4 provide high selectivity for Pb2+ over Cd2+ and Zn2+ in transport across plasticized cellulose triacetate membranes. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：1195 / 1204

页数：10

共 28 条

[1] Redox-active aza-crown ethers derived from biphenyl. Electrochemical and solution studies of complexation [J].