The rotational and vibrational dynamics of argon-methane. I. A theoretical study

被引:38
作者
Heijmen, TGA
Wormer, PES
van der Avoird, A
Miller, RE
Moszynski, R
机构
[1] Univ Nijmegen, NSR Ctr, Inst Theoret Chem, NL-6525 ED Nijmegen, Netherlands
[2] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA
[3] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland
关键词
D O I
10.1063/1.478462
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
Reported here is a theoretical calculation of the spectrum of the argon-methane complex based upon a previously reported ab initio potential energy surface [T. G. A. Heijmen et al., J. Chem. Phys. 107, 902 (1997)]. The irregular rotational structure observed in the spectrum is traced to a combination of the fact that the excited vibrational state of the methane has vibrational angular momentum and the methane rotates nearly freely within the complex. The theoretical spectrum is compared qualitatively with the experimental results obtained using the optothermal method, a more complete discussion of which is given in a companion paper, hereafter referred to as paper II. (C) 1999 American Institute of Physics. [S0021-9606(99)01610-4].
引用
收藏
页码:5639 / 5650
页数:12
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