کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1250289 | 970803 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature dependent Raman scattering study of l-ascorbic acid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Temperature dependent Raman scattering study of l-ascorbic acid Temperature dependent Raman scattering study of l-ascorbic acid](/preview/png/1250289.png)
چکیده انگلیسی
Temperature dependent Raman study of l-ascorbic acid has been performed from 15 to 418 K. Changes in the wavenumber vs. temperature plots for some internal modes were interpreted as conformational molecular change and the discontinuity in the wavenumber vs. temperature plots along with the appearance of a new vibrational mode in the temperature range 200–270 K suggests that l-ascorbic acid undergoes a structural phase transition. For temperatures higher than 300 K, no relevant modification was observed on the Raman spectra thus indicating a stable structure at high temperatures. Additionally, a correlation between OH stretching wavenumber and the behavior of hydrogen bond is also made.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 55, Issue 1, 18 January 2011, Pages 101–106
Journal: Vibrational Spectroscopy - Volume 55, Issue 1, 18 January 2011, Pages 101–106
نویسندگان
G.D. Saraiva, J.A. Lima Jr., F.F. de Sousa, P.T.C. Freire, J. Mendes Filho, A.G. Souza Filho,