FT-IR and dielectric study of water/AOT liquid crystals

被引：36

作者：

Calandra, P ^{[1
]}

Caponetti, E ^{[1
]}

Martino, DC ^{[1
]}

D'Angelo, P ^{[1
]}

Minore, A ^{[1
]}

Liveri, VT ^{[1
]}

机构：

[1] Univ Palermo, Dept Phys Chem, I-90128 Palermo, Italy

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2000年 / 522卷

关键词：

FT-IR spectroscopy; time domain reflectometry; liquid crystals; AOT;

D O I：

10.1016/S0022-2860(99)00351-8

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：

In order to explore the influence of microwave radiation on highly viscous microheterogeneous systems, the evolution of structural and dynamical properties of the water/sodium bis(2-ethylhexyl) sulfosuccinate (AOT) liquid crystals as a function of the molar ratio R (R = [water]/[AOT]) has been investigated by FT-IR spectroscopy and time domain reflectometry. The study emphasises how the progressive hydration of the surfactant head groups is mainly responsible for the structural and dynamical evolution of water/AOT liquid crystals. In particular, it has been found that the state of water at lower R values is strongly perturbed, bulk-like water appears only at R > 23 and the water/AOT interface polarisation is controlled by the fast translational dynamics of sodium counterions and the slow orientational dynamics of the AOT ionic head groups. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：165 / 178

页数：14

共 25 条

[1] PHASE CONTINUITY AND SURFACE-PROPERTIES OF DISPERSIONS OF AOT WATER LIQUID-CRYSTALS [J].