کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5391262 | 1505173 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamics of intramolecular vibrational redistribution in propargylchloride molecule studied by time-resolved Raman spectroscopy
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
We have studied the dynamics of intramolecular vibrational energy redistribution (IVR) from the initially excited mode ν1 (acetylene-type H-C bond) in H-CC-CH2Cl molecules in the gaseous phase by means of anti-Stokes spontaneous Raman scattering. The energy relaxation from ν1 due to IVR was estimated to occur on the time-scale Ï â 750 ps, which is one of the slowest IVR time-scales reported so far. The deactivation due to molecular collisions occurred with a rate constant of â8.5 μsâ1 Torrâ1, and was slower than the IVR process. A theoretical model which is based on the idea of statistical nature of couplings and incompleteness of IVR (expressed in the form of the so-called dilution factor) is proposed. The model provides rationalization for the observed kinetics and suggests that the IVR process is mediated by not only anharmonic but also vibrational-rotational interactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics Letters - Volume 419, Issues 4â6, 26 February 2006, Pages 511-516
Journal: Chemical Physics Letters - Volume 419, Issues 4â6, 26 February 2006, Pages 511-516
نویسندگان
A.L. Malinovsky, Yu.S. Doljikov, A.A. Makarov, N.-D.D. Ogurok, E.A. Ryabov,