کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1251903 1495994 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using Raman spectroscopy to understand the origin of the phase transition observed in the crystalline sulfur based amino acid l-methionine
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Using Raman spectroscopy to understand the origin of the phase transition observed in the crystalline sulfur based amino acid l-methionine
چکیده انگلیسی

We present the Raman spectra of l-methionine (C5H11NO2S) monocrystals obtained in the spectral region ranging from 3200 to 50 cm−1 at temperatures from 20 to 375 K. We investigated the dynamics of the different functional groups in l-methionine and related their behaviour to the structural transition previously reported at about 307 K. Additionally, on cooling, changes in the intensities of some Raman bands were associated with conformational changes of at least one of the two l-methionine conformers in the monoclinic unit cell in the interval 160–140 K. Thermal analysis and DFT calculations provide further support to the interpretation of the Raman results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 65, March 2013, Pages 132–141
نویسندگان
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