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Effect of beta-Ring Rotation on the Structures and Vibrational Spectra of beta-Carotene: Density Functional Theory Analysis
Liu, WL; Wang, ZG; Zheng, ZR; Li, AH; Su, WH; Zheng, ZR (reprint author), Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China
2008
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY A
ISSN1089-5639
Volume112Issue:42Pages:10580
AbstractThe effect of beta-ring rotation on the structures and vibrational spectroscopic characteristics of beta-carotene, including infrared (IR) intensities and Raman activities. is analyzed using density functional theory. Two stable isomers having Ci symmetry are obtained. The reversion of bond lengths is ascribed to the hyperconjugation effect. The natural bond orbital (NBO) charge analysis suggests that the NBO charges of C5 can be used to estimate the degree of pi-electron de localization. These structural variations are used to analyze and assign the vibrational spectra. It is concluded that (a) the similar rotational angle dependencies of v1 and v2 frequencies Justify the contribution of C = C stretch vibrations to the v2 mode and explain the same conjugation length dependencies of v1 and v2 frequencies in polyenes, (b) the v1 mode can be assigned to the C = C stretching, in the central part of polyene chain, whereas beta-rings play an important role in v2 and IR1 bands, especially for the all-trans isomer, and (c) the transition dipole moment of the calculated IR1 absorption band is relevant to the conjugation degree and the crossing angle between the eigenvectors of the polyene chain and the C5 = C6 stretching vibration. This theoretical analysis, together with our previous Raman spectral experiments, suggests that the C6-C7 bond is easier to be twisted than other parts of beta-carotene molecule and so provides an insight into the structures of carotenoids and the properties of binding sites III carotenoproteins.
Subject AreaPhysics
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000260100800019
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/7703
Collection中科院上海应用物理研究所2004-2010年
Corresponding AuthorZheng, ZR (reprint author), Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China
Recommended Citation
GB/T 7714
Liu, WL,Wang, ZG,Zheng, ZR,et al. Effect of beta-Ring Rotation on the Structures and Vibrational Spectra of beta-Carotene: Density Functional Theory Analysis[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2008,112(42):10580.
APA Liu, WL,Wang, ZG,Zheng, ZR,Li, AH,Su, WH,&Zheng, ZR .(2008).Effect of beta-Ring Rotation on the Structures and Vibrational Spectra of beta-Carotene: Density Functional Theory Analysis.JOURNAL OF PHYSICAL CHEMISTRY A,112(42),10580.
MLA Liu, WL,et al."Effect of beta-Ring Rotation on the Structures and Vibrational Spectra of beta-Carotene: Density Functional Theory Analysis".JOURNAL OF PHYSICAL CHEMISTRY A 112.42(2008):10580.
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