کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10558283 968974 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Matrix-isolation FT-IR spectroscopic study and theoretical DFT(B3LYP)/6-31 ++ G** calculations of the vibrational and conformational properties of tyrosine
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Matrix-isolation FT-IR spectroscopic study and theoretical DFT(B3LYP)/6-31 ++ G** calculations of the vibrational and conformational properties of tyrosine
چکیده انگلیسی
The complicated conformational isomerism of tyrosine is studied by experimental matrix-isolation FT-IR spectroscopy combined with theoretical DFT(B3LYP)/6-31 ++ G** calculations. Not less than 18 possible conformations of tyrosine have been considered theoretically. The results revealed that the most and the less stable forms of neutral tyrosine have the same conformation of the main part of amino acid (conformation II) but they differ in orientation of the phenyl ring. The calculated values of the relative energies suggest that all conformations would be detectable in the experimental spectrum. However, it appeared that it is not possible to distinguish in the experimental spectrum between the bands due to the forms with the same conformation of the main part of amino acid but a different orientation of the phenol ring.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 61, Issue 7, May 2005, Pages 1347-1356
نویسندگان
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