Near-infrared laser spectroscopy of the Ar-C2HD complex:: Fermi resonance assisted vibrational predissociation

被引：21

作者：

Bemish, RJ ^{[1
]}

Miller, RE ^{[1
]}

机构：

[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 281卷 / 4-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(97)01007-5

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：

The rotationally resolved infrared spectrum is reported for the C-H stretching vibration of Ar-HCCD. A bending combination band is also observed from which we obtain an accurate value for the low-frequency intermolecular bending frequency. The vibrational predissociation lifetime of Ar-HCCD is found to be considerably longer than that of Ar-C2H2. This difference is attributed to the strong Fermi resonance in Ar-C2H2 which is absence in Ar-HCCD. We propose that the perturbing level in the Ar-C2H2 complex provides a 'doorway' that accelerates the dissociation in this system. In Ar-HCCD, where this 'doorway state' is not Fermi mixed, the dissociation is slower. (C) 1997 Elsevier Science B.V.

引用

页码：272 / 280

页数：9

共 29 条

[11] THE VIBRATION-ROTATION SPECTRUM OF THE ARGON ACETYLENE VANDERWAALS COMPLEX [J].