POTASSIUM-ION SELECTIVE MEMBRANES BUILT BY THE LANGMUIR-BLODGETT TECHNIQUE

被引：13

作者：

GILARDONI, A ^{[1
]}

MARGHERI, E ^{[1
]}

GABRIELLI, G ^{[1
]}

机构：

[1] UNIV FLORENCE,DEPT CHEM,VIA G CAPPONI 9,I-50121 FLORENCE,ITALY

来源：

COLLOIDS AND SURFACES | 1992年 / 68卷 / 04期

关键词：

AIR WATER INTERFACE; LANGMUIR-BLODGETT TECHNIQUE; POTASSIUM ION; SELECTIVE MEMBRANE;

D O I：

10.1016/0166-6622(92)80209-K

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：

Spreading monolayers of the ionophore valinomycin in mixtures-with methyl stearate with different molar ratios were studied at the air/water interface in the 15-30-degrees-C temperature range. The bidimensional miscibility of the two components was deduced by recording spreading isotherms, which allowed also the evaluation of the thermodynamic parameters DELTAG(mix), DELTAH(mix) and TDELTAS(mix). Langmuir-Blodgett (LB) films of mixtures with various molar ratios were built by transferring spreading monolayers from the air/water interface on to hydrophobic and hydrophilic substrates, and their electrical resistance was determined using KCl and NaCl solutions in the 10(-3)-5.10(-1) M concentration range. It was verified that valinomycin-containing mixtures showed K+ ion selectivity in LB films, at an opportune molar ratio between the two components.

引用

页码：235 / 242

页数：8

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