کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1250001 1496001 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pressure-tuned vibrational resonance coupling of intramolecular fundamentals in ammonium azide (NH4N3)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Pressure-tuned vibrational resonance coupling of intramolecular fundamentals in ammonium azide (NH4N3)
چکیده انگلیسی

The peculiar behavior of the symmetric stretch of the N3-anion and the bending mode of the NH4-cation in the high-pressure phase II (above 3 GPa) of the molecular ionic crystal NH4N3 has been studied by pressure-dependent Raman spectroscopy up to a pressure of 20 GPa. The spectra in the pressure range above 10 GPa reveal a remarkable intensity transfer between bands and a level repulsion (characteristic of vibrational resonance coupling) that is mediated by hydrogen bonding between the N3- and NH4-ions. These observations may be useful for theoretical studies of the potential energy surface and for studying the nature of hydrogen bonding in ammonium salts. With respect to the biological activity of the ammonium ion, the observed resonance coupling may be relevant to vibrational energy transfer in organic systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 58, January 2012, Pages 188–192
نویسندگان
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