DIELECTRIC-RELAXATION STUDY OF HEXAMETHYLPHOSPHORAMIDE-WATER MIXTURES USING TIME-DOMAIN REFLECTOMETRY

被引：66

作者：

KUMBHARKHANE, AC ^{[1
]}

HELAMBE, SN ^{[1
]}

DORAISWAMY, S ^{[1
]}

MEHROTRA, SC ^{[1
]}

机构：

[1] TATA INST FUNDAMENTAL RES,CHEM PHYS GRP,BOMBAY 400005,INDIA

来源：

JOURNAL OF CHEMICAL PHYSICS | 1993年 / 99卷 / 04期

关键词：

D O I：

10.1063/1.465255

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：

The dielectric relaxation studies of hexamethylphosphoramide-water mixtures have been carried out at different temperatures using time domain reflectometry technique in the frequency range of 10 MHz to 10 GHz. A calibration method based on the least squares fit has been suggested to determine the complex permittivity at the high frequency region for the aqueous solutions. The excess dielectric, Kirkwood correlation factor and thermodynamic properties in the mixture have been determined. These properties suggest a Cage-type structure of hexamethylphosphoramide molecules around water molecules. The structure has a tendency to break down in the presence of water.

引用

页码：2405 / 2409

页数：5

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