Temperature dependent Raman scattering study of L-ascorbic acid

被引：18

作者：

Saraiva, G. D. ^{[1
]}

Lima, J. A., Jr. ^{[2
]}

de Sousa, F. F. ^{[2
,3
]}

Freire, P. T. C. ^{[2
]}

Mendes Filho, J. ^{[2
]}

Souza Filho, A. G. ^{[2
]}

机构：

[1] Univ Estadual Ceara, Fac Educacao Ciencias & Letras Sertao Cent, BR-63900000 Quixada, CE, Brazil

[2] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil

[3] Fed Univ Para, Fac Ciencias Nat, BR-68505080 Maraba, PA, Brazil

来源：

VIBRATIONAL SPECTROSCOPY | 2011年 / 55卷 / 01期

关键词：

Raman spectroscopy; L-Ascorbic acid; Temperature; Phase transition; L-ALANINE CRYSTAL; VITAMIN-C; SPECTRA; ABSORPTION;

D O I：

10.1016/j.vibspec.2010.09.006

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Temperature dependent Raman study of L-ascorbic acid has been performed from 15 to 418K. 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 300K, 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. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：101 / 106

页数：6

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