Facilitated ion transfer across the micro-liquid /liquid interface supported at the tip of a silanized micropipette

被引：0
|
作者：
Su, B [1 ]
Shao, YH [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
来源：
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2003年 / 19卷 / 01期
关键词：
silanization; micropipette; facilitated K+ transfer; mechanism;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Glass micropipettes with silanized inner walls can be filled with an organic solvent for voltammetric measurements in an aqueous solution. This arrangement was employed to investigate systematically the mechanism of facilitated potassium ion transfer by an ionophore dibenzo-18-crown-6 (DB18C6) across a micro-water/1.2-dichloroethane(W/DCE) interface supported at the tip of a silanized micropipette. Our experimental results verify that this facilitated ion transfer across the liquid/liquid interface did occur by an interfacial complexation-dissociation process (TIC-TID mechanism). The ratio of the diffusion coefficient of DB18C6 to that of its complexed ion in the DCE phase was calculated to be 1.74 +/- 0.07.
引用
收藏
页码：59 / 62
页数：4
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