کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5416156 | 1393799 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Infrared combination and difference bands of the NO dimer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Infrared combination and difference bands of the NO dimer Infrared combination and difference bands of the NO dimer](/preview/png/5416156.png)
چکیده انگلیسی
The mid-infrared (1500-3800 cmâ1) absorption spectrum of gaseous nitric oxide has been studied at low temperature (99 K) with a long absorption path (160 m) in order to observe weak combination, difference, and overtone bands of the NO dimer. About ten new bands were assigned with greater or lesser certainty. Combined with previous results, they lead to a set of 12 secure and 7 tentative vibrational term values for (NO)2, essentially doubling our knowledge of NO dimer vibrational states. The strongest non-fundamental bands in this region, other than the ν1 (symmetric N-O stretch) + ν5 (asymmetric N-O stretch) overtone, involve combinations of ν5 with ν3 (intermolecular stretch). Excitation of ν5 results in increased frequencies for the intermolecular modes ν2, ν3, and ν4. A new value of 155.5 cmâ1 was obtained for ν4, the elusive infrared-inactive out-of-plane fundamental vibration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 238, Issue 1, July 2006, Pages 127-134
Journal: Journal of Molecular Spectroscopy - Volume 238, Issue 1, July 2006, Pages 127-134
نویسندگان
Ke-Xian Au Yong, Jenna M. King, A.R.W. McKellar, J.K.G. Watson,