High-Resolution Near-Infrared Spectroscopy of CH2+ and Its Deuterated Isotopologues

被引:9
|
作者
Wang, Haiming [1 ,2 ]
Neese, Christopher F. [1 ,2 ]
Morong, Christopher P. [1 ,2 ]
Kleshcheva, Maria [1 ,2 ]
Oka, Takeshi [1 ,2 ,3 ]
机构
[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA
[2] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[3] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
关键词
AB-INITIO CALCULATION; ELECTRONIC STATES; INTERSTELLAR OH+; H2O+; SPECTRUM; ENERGY; H-3(+); (X)OVER-TILDE; HYDRIDES; CLOUDS;
D O I
10.1021/jp3128803
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
Aiming to provide approximate rotational constants for millimeter Wave, spectroscopists to identify the corresponding species in Space, we have recorded the near infrared spectra of the methylene cation CH2+ and its deuterated isotopologues, CD2+ and CHD+, using a high resolution and high sensitivity spectrometer. Detection of CH2+ in space will shed light on interstellar chemistry as it is the intermediate between the abundant CH+ and yet to be observed CH3+, which is important in the formation of larger organic molecules. CH2+ and its deuterated isotopologues are also of special interest for theoretical studies because of their. unique intramolecular dynamics, i.e., the Renner-Teller interaction and quasi-linearity. This paper will discuss several new bands of CH2+, the (A) over tilde (0,5[11],0)(0) <-- <(X)over tilde>(0,0[0],0)(1) and (A) over tilde (0,4[11],0)(2) <-- <(X)over tilde>(0,0[0],0)(1) bands of CD2+, which have been identified and analyzed, and the candidate lines for the (A) over tilde (0,4[10],0)(1) <-- <(X)over tilde>(0,0[1],0)(0) band of CHD+, in comparison with the theoretical predictions by Bunker and colleagues.
引用
收藏
页码:9908 / 9918
页数:11
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