کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1404196 | 1501883 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dinitrogen and carbon monoxide hydrogen bonding in protonic zeolites: Studies from variable-temperature infrared spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Adsorption (at a low temperature) of nitrogen on the protonic zeolite H-Y results in hydrogen bonding of the adsorbed N2 molecules with the zeolite Si(OH)Al Brønsted-acid groups. This hydrogen-bonding interaction leads to activation, in the infrared, of the fundamental N-N stretching mode, which appears at 2334 cmâ1. From infrared spectra taken over a temperature range, the standard enthalpy of formation of the OH···N2 complex was found to be ÎH0 = â15.7(±1) kJ molâ1. Similarly, variable-temperature infrared spectroscopy was used to determine the standard enthalpy change involved in formation of H-bonded CO complexes for CO adsorbed on the zeolites H-ZSM-5 and H-FER; the corresponding values of ÎH0 were found to be â29.4(±1) and â28.4(±1) kJ molâ1, respectively. The whole set of results was analysed in the context of other relevant data available in the literature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 880, Issues 1â3, 27 May 2008, Pages 31-37
Journal: Journal of Molecular Structure - Volume 880, Issues 1â3, 27 May 2008, Pages 31-37
نویسندگان
C. Otero Areán,