Phase diagrams for monolayers of long-chain thioacetates

被引：0

作者：

Marshall, C

Teer, E

Knobler, CM ^{[1
]}

Schalke, M

Lösche, M

机构：

[1] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[2] Univ Leipzig, Inst Expt Phys 1, D-04103 Leipzig, Germany

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 171卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

Langmuir monolayers; thioacetates; phase diagrams; Brewster-angle microscopy; infrared reflection-absorption spectroscopy;

D O I：

10.1016/S0927-7757(99)00549-X

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：

Brewster-angle microscopy has been employed to determine the phase diagrams of Langmuir monolayers of several long-chain thioacetates: S-hexadecyl acetate, S-octadecyl acetate, S-eicosyl acetate and S-docosyl acetate. The phases in S-octadecyl acetate were identified by carrying out a dilution study with octadecyl acetate. A composite thioacetate diagram could be established by superimposing the diagrams for the individual thioacetates with suitable shifts to account for the differences in chain length. Infrared reflection-absorption spectroscopic studies of monolayers of octadecyl acetate and S-octadecyl acetate show that the differences between their phase diagrams can be attributed, at least in part, to the extent of hydrogen bonding of the carbonyl group. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：41 / 48

页数：8