کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5376101 1504317 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultrafast vibrational excitation transfer and vibrational cooling of propionic acid dimers investigated with IR-pump IR-probe spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Ultrafast vibrational excitation transfer and vibrational cooling of propionic acid dimers investigated with IR-pump IR-probe spectroscopy
چکیده انگلیسی
Ultrafast IR-pump IR-probe spectroscopy is used to study the relaxation dynamics of propionic acid dimers. The spectral changes in the regions of CO-stretching at ∼1700 cm−1, OH and CH-bending modes around 1400 cm−1 are investigated after excitation in the range of the CH- and CO-stretching modes. A strong coupling of the OH-stretch vibration to CO-stretching and OH/CH-bending modes is found. The intramolecular redistribution of vibrational energy takes place on a 1 ps time-scale. A further cooling process and energy transfer to the surrounding occur with ∼12 ps. The dynamics depend on the wavelength of the IR-excitation and point to a transient breaking of one of the two H-bonds of the propionic acid dimers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 341, Issues 1–3, 15 November 2007, Pages 200-206
نویسندگان
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