STOICHIOMETRY OF LANGMUIR-BLODGETT MULTILAYERS OF DOCOSYLAMMONIUM ARSENATE

被引：13

作者：

ANGELOVA, A

PETROV, JG

KULEFF, I

机构：

[1] BULGARIAN ACAD SCI,CENT LAB MINERAL PROC,POB 32,BU-1126 SOFIA,BULGARIA

[2] UNIV SOFIA,FAC CHEM,BU-1126 SOFIA,BULGARIA

来源：

LANGMUIR | 1992年 / 8卷 / 01期

关键词：

D O I：

10.1021/la00037a039

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The stoichiometry of Langmuir-Blodgett multilayers of docosylammonium arsenate has been studied by means of neutron-activation analysis. The content of arsenic in the multilayer systems has been determined at different pH's and concentrations of arsenate in the aqueous subsolution, and the number of anions per docosylamine molecule, theta, has been evaluated. The results show that the counterion inclusion is stoichiometric and that it is due to electrostatic interaction between the positively charged ammonium groups of the monolayer and arsenate anions of the subsolution. From the theta/pH and theta/C0 dependences, it follows that the divalent counterions HAsO4(2-) are predominantly present in the multilayers.

引用

页码：213 / 216

页数：4

共 18 条

[1] The structure of surface films Part XV - Amines [J].