Raman spectra and vibrational relaxation in molten thiocyanates

被引：16

作者：

Aliev, AR ^{[1
]}

Gadzhiev, AZ ^{[1
]}

机构：

[1] Russian Acad Sci, Dagestan Sci Ctr, Inst Phys, Makhachkala 367003, Russia

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2003年 / 107卷 / 1-3期

关键词：

Raman spectra; vibrational relaxation; correlation function; molten salt; ionic system; thiocyanates of alkali metals;

D O I：

10.1016/S0167-7322(03)00140-5

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：

Temperature measurements of Raman spectra of thiocyanates of alkali metals in the interval from T-melt to T-melt+100 K are carried out. A method of correlation functions (CF) is discussed which allows one to apply for the analysis the intensity distribution over the whole band contour and which associates the experimental spectrum with the molecular motion characteristics. CF of vibrational relaxation are calculated. It is shown that the main mechanism of the vibrational relaxation and, consequently, the reason of broadening of isotropic components in Raman spectra of ionic melts is the phase relaxation process as a result of frequent quasi-elastic collisions of ions. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：59 / 67

页数：9

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