Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra
The effect of high pressure on the molecular structure and π-electron delocalization of canthaxanthin was studied by in situ resonance Raman spectroscopy. Changes in the characteristic band frequency and the pressure of canthaxanthin were described. The effect of pressure on π-electron delocalizatio...
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Wiley
2015-01-01
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| Series: | Journal of Spectroscopy |
| Online Access: | http://dx.doi.org/10.1155/2015/467089 |
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| author | Shun-li Ou-Yang Nan-nan Wu Yan-jie Tian |
| author_facet | Shun-li Ou-Yang Nan-nan Wu Yan-jie Tian |
| author_sort | Shun-li Ou-Yang |
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| description | The effect of high pressure on the molecular structure and π-electron delocalization of canthaxanthin was studied by in situ resonance Raman spectroscopy. Changes in the characteristic band frequency and the pressure of canthaxanthin were described. The effect of pressure on π-electron delocalization was also discussed. Results show that the characteristic bands of canthaxanthin increase and reach high wavenumbers. The correlations between Raman frequency of the three main bands and pressure are listed as follows: ν1(C=C) = 3.43P + 1512.3, ν2(C-C) = 3.29P + 1156.1, and ν3(CH3) = 2.16P + 1006.3. The frequency multiplication of canthaxanthin changes as pressure is altered. The pressure effect on the ν1(C=C) mode is more susceptible than on the ν2(C-C) mode, which can be explained by the fact that the β-ring twists to a larger angle from the plane of the conjugated main chain under high pressure, leading to a lower degree of the π-electrons delocalization. The Raman spectra are recovered after the compression-decompression cycle indicating the canthaxanthin has no evident phase change under our experimental conditions. |
| format | Article |
| id | doaj-art-3fc5a55f7eeb49b99e1c5026d06925e3 |
| institution | Kabale University |
| issn | 2314-4920 2314-4939 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Journal of Spectroscopy |
| spelling | doaj-art-3fc5a55f7eeb49b99e1c5026d06925e32025-02-03T06:07:59ZengWileyJournal of Spectroscopy2314-49202314-49392015-01-01201510.1155/2015/467089467089Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman SpectraShun-li Ou-Yang0Nan-nan Wu1Yan-jie Tian2Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science & Technology, Baotou 014010, ChinaKey Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science & Technology, Baotou 014010, ChinaDepartment of Fundamental Physics, College of Science, China University of Petroleum, Qingdao, Shandong 266555, ChinaThe effect of high pressure on the molecular structure and π-electron delocalization of canthaxanthin was studied by in situ resonance Raman spectroscopy. Changes in the characteristic band frequency and the pressure of canthaxanthin were described. The effect of pressure on π-electron delocalization was also discussed. Results show that the characteristic bands of canthaxanthin increase and reach high wavenumbers. The correlations between Raman frequency of the three main bands and pressure are listed as follows: ν1(C=C) = 3.43P + 1512.3, ν2(C-C) = 3.29P + 1156.1, and ν3(CH3) = 2.16P + 1006.3. The frequency multiplication of canthaxanthin changes as pressure is altered. The pressure effect on the ν1(C=C) mode is more susceptible than on the ν2(C-C) mode, which can be explained by the fact that the β-ring twists to a larger angle from the plane of the conjugated main chain under high pressure, leading to a lower degree of the π-electrons delocalization. The Raman spectra are recovered after the compression-decompression cycle indicating the canthaxanthin has no evident phase change under our experimental conditions.http://dx.doi.org/10.1155/2015/467089 |
| spellingShingle | Shun-li Ou-Yang Nan-nan Wu Yan-jie Tian Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra Journal of Spectroscopy |
| title | Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra |
| title_full | Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra |
| title_fullStr | Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra |
| title_full_unstemmed | Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra |
| title_short | Effect of High Pressure on the Molecular Structure and π-Electrons Delocalization of Canthaxanthin as Revealed by Raman Spectra |
| title_sort | effect of high pressure on the molecular structure and π electrons delocalization of canthaxanthin as revealed by raman spectra |
| url | http://dx.doi.org/10.1155/2015/467089 |
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