Hybrid organic-inorganic electrode-membranes based on organo-polysiloxane/macrocycle systems

被引：20

作者：

Jiménez-Morales, A ^{[1
]}

Galván, JC ^{[1
]}

Aranda, P ^{[1
]}

Ruiz-Hitzky, E ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

来源：

ORGANIC/INORGANIC HYBRID MATERIALS | 1998年 / 519卷

关键词：

D O I：

10.1557/PROC-519-211

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Specific complexing agents for alkaline ions such as some crown-ethers of different intramolecular cavity size (12-crown-4, 15-crown-5 and 18-crown-6) are incorporated into a organo-polyorganosiloxane network generated via the sol-gel process. The resulting xerogels embody macrocycle compounds with different ion-selectivity. These xerogels are deposited onto porous supports (borosilicate, polyacrylonitrile,...) to obtain new composite electrode-membranes. The electrochemical characterization of the membranes and the electrode-membranes by electrochemical impedance spectroscopy (EIS) shows information about the reversible behavior and the ion resistance of the membranes, which are a function of both, nature and content of the entrapped macrocycle as well as the salt solution concentration. The electrochemical response of these systems acting as electrode-membranes shows their sensitivity towards different metal ions at variable concentrations.

引用

页码：211 / 216

页数：6