Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure

The Raman spectra of all-trans-lycopene in n-hexane were measured under high pressure, and the results compared with those of β-carotene. The different pressure effects on Raman spectra are analyzed taking into account the different structures of lycopene and β-carotene molecules. It is concluded th...

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Main Authors:	Da-Peng Xu, Ai-Hua Li, Wei Zhang, Zhi-Ren Zheng, Wei-Long Liu, Ming-Ming Huo
Format:	Article
Language:	English
Published:	MDPI AG 2011-02-01
Series:	Molecules
Subjects:	pressure structure Raman lycopene β-carotene
Online Access:	http://www.mdpi.com/1420-3049/16/3/1973/

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spelling	doaj-686cded56847455c9616c3b27ce2aa7b2020-11-25T01:03:06ZengMDPI AGMolecules1420-30492011-02-011631973198010.3390/molecules16031973Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High PressureDa-Peng XuAi-Hua LiWei ZhangZhi-Ren ZhengWei-Long LiuMing-Ming HuoThe Raman spectra of all-trans-lycopene in n-hexane were measured under high pressure, and the results compared with those of β-carotene. The different pressure effects on Raman spectra are analyzed taking into account the different structures of lycopene and β-carotene molecules. It is concluded that: (a) the vibronic coupling between the S1 and S0 states of β-carotene is stronger than that of lycopene, (b) the diabatic frequency increment of the ν1 mode is more susceptible to pressure than that of the ν2 mode for lycopene, and (c) β-rings rotation can relieve the pressure effect on the C=C bond length in β-carotene. This work provides some insights for elucidating the structural and environmental effects on Raman spectra of carotenoids. http://www.mdpi.com/1420-3049/16/3/1973/pressurestructureRamanlycopeneβ-carotene
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Da-Peng Xu Ai-Hua Li Wei Zhang Zhi-Ren Zheng Wei-Long Liu Ming-Ming Huo
spellingShingle	Da-Peng Xu Ai-Hua Li Wei Zhang Zhi-Ren Zheng Wei-Long Liu Ming-Ming Huo Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure Molecules pressure structure Raman lycopene β-carotene
author_facet	Da-Peng Xu Ai-Hua Li Wei Zhang Zhi-Ren Zheng Wei-Long Liu Ming-Ming Huo
author_sort	Da-Peng Xu
title	Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure
title_short	Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure
title_full	Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure
title_fullStr	Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure
title_full_unstemmed	Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure
title_sort	effect of end groups on the raman spectra of lycopene and β-carotene under high pressure
publisher	MDPI AG
series	Molecules
issn	1420-3049
publishDate	2011-02-01
description	The Raman spectra of all-trans-lycopene in n-hexane were measured under high pressure, and the results compared with those of β-carotene. The different pressure effects on Raman spectra are analyzed taking into account the different structures of lycopene and β-carotene molecules. It is concluded that: (a) the vibronic coupling between the S1 and S0 states of β-carotene is stronger than that of lycopene, (b) the diabatic frequency increment of the ν1 mode is more susceptible to pressure than that of the ν2 mode for lycopene, and (c) β-rings rotation can relieve the pressure effect on the C=C bond length in β-carotene. This work provides some insights for elucidating the structural and environmental effects on Raman spectra of carotenoids.
topic	pressure structure Raman lycopene β-carotene
url	http://www.mdpi.com/1420-3049/16/3/1973/
work_keys_str_mv	AT dapengxu effectofendgroupsontheramanspectraoflycopeneandbcaroteneunderhighpressure AT aihuali effectofendgroupsontheramanspectraoflycopeneandbcaroteneunderhighpressure AT weizhang effectofendgroupsontheramanspectraoflycopeneandbcaroteneunderhighpressure AT zhirenzheng effectofendgroupsontheramanspectraoflycopeneandbcaroteneunderhighpressure AT weilongliu effectofendgroupsontheramanspectraoflycopeneandbcaroteneunderhighpressure AT mingminghuo effectofendgroupsontheramanspectraoflycopeneandbcaroteneunderhighpressure
_version_	1725202492908634112

Effect of End Groups on the Raman Spectra of Lycopene and β-Carotene under High Pressure

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