Phase Transition in all-trans-β-Carotene Crystal: Temperature-Dependent Raman Spectra

The Journal of Physical Chemistry. a
Kleber J R da SilvaSanclayton G C Moreira

Abstract

In this study, we studied the stability of an all-trans-β-carotene single crystal using Raman spectroscopy with line excitation at 632.8 nm, in the temperature range 20–300 K. The Raman spectra exhibit clear modifications in the spectral range of the lattice and internal vibrational modes. The temperature dependence of the most intense vibrational modes ν1 (1511 cm(–1)) and ν2 (1156 cm(–1)) that are related to the C═C and C—C stretching vibrations of the polyene chain, respectively, shows an upward shift on the Raman modes. This behavior is similar to that stated in the theoretical work of Wei-Long Liu et al. We conclude that the all-trans-β-carotene crystal undergoes a temperature-induced phase transition at approximately 219 K. This transition is interpreted as a rotation experienced by β-ring groups at each end of the all-trans-β-carotene molecule around the dihedral angle. At low temperatures, the new molecular configuration affects the sliding plane of the space group C2h(5)(P2(1)/n), and the phase transition leads to an unchanged monoclinic structure; however, the original space group is possibly lowered to the space group C2. In the temperature range 200–220 K, the spectral ratio (S) of the integrated intensities of the ...Continue Reading

References

Jul 11, 1973·Journal of the American Chemical Society·L RimaiD Gill
Dec 15, 1968·Acta Crystallographica. Section B, Structural Science·J C Bart, C H MacGillavry
May 11, 1984·Science·G W Burton, K U Ingold
Nov 1, 1993·Journal of the American Dietetic Association·A C Ross, M E Ternus
May 2, 1996·The New England Journal of Medicine·G S OmennS Hammar
Mar 4, 2000·Journal of Pharmaceutical and Biomedical Analysis·H BartschH Kopelent-Frank
Mar 18, 2008·Free Radical Research·Yu-Xi TianLeif H Skibsted
Jan 24, 2009·The Journal of Physical Chemistry. a·Gopal K PradhanChandrabhas Narayana
Mar 2, 2011·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ming-Ming HuoDa-Peng Xu
Sep 29, 2011·Molecular Nutrition & Food Research·Wilhelm Stahl, Helmut Sies

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Citations

Dec 1, 2018·Optics Letters·Venkata Siva GummaluriC Vijayan
Mar 25, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·V S NovikovG Yu Nikolaeva

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