VIBRATIONAL-RELAXATION OF C-H STRETCHING MODES IN METHANE AND ITS HALOGENATED DERIVATIVES

被引：10

作者：

KOSTEREV, AA ^{[1
]}

MALINOVSKY, AL ^{[1
]}

RYABOV, EA ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST SPECT,TROICK 142092,USSR

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 199卷 / 3-4期

关键词：

D O I：

10.1016/0009-2614(92)80130-4

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：

Time-resolved Raman probing techniques have been used to investigate the collisional relaxation of C-H vibrations in CH4. CHF3 and CHF2Cl. It has been shown for CH4 that there is exchange initially between the nu1 and nu3 modes, and then a transfer to deformation vibrations occurs. The related constants have been measured. The relaxation in CHF3 and CHF2Cl is found to be abnormally fast, the time constants ptau are 60(-10)+20 ns Torr and 30(-5)+10 ns Torr, respectively, which is less than the time of a gas-kinetic collision. Possible causes of such rapid relaxation are discussed.

引用

页码：349 / 354

页数：6

共 18 条

[1]

ALIMPIEV SS, 1983, JETP LETT+, V38, P421

[2] TEMPERATURE DEPENDENCE OF SOUND DISPERSION IN HALO-METHANE GASES [J].