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题名: Excited state dynamics of beta-carotene studied by means of transient absorption spectroscopy and multivariate curve resolution alternating least-squares analysis
作者: Vdovic, Silvije1, 2, 3;  Wang, Yingying1, 2;  Li, Boxuan1, 2;  Qiu, Meng1, 2;  Wang, Xuefei1, 2;  Guo, Qianjin1, 2;  Xia, Andong1, 2
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2013
DOI: 10.1039/c3cp53323a
卷: 15, 期:46, 页:20026-20036
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Determination of the excited-state dynamics of carotenoids has attracted considerable interest, engendering a number of controversial hypotheses because of the strongly overlapping spectral peaks and complicated dynamics of transient species. In the present work, aiming for better understanding the complexity of excited-state processes in carotenoids, excited-state dynamics of all-trans-beta-carotene in ethanol was investigated by femtosecond pump-probe spectroscopy. Following the excitation of the strongly allowed S-2 state of the beta-carotene, transient absorption spectra were recorded in the visible spectral range. For comparison, the time-resolved transient absorption spectra are analyzed in a conventional way, fitting kinetic traces with a multi-exponential function at chosen wavelengths from obtained spectra, and then again by means of the soft-modeling multivariate curve resolution alternating least-squares analysis (MCR-ALS) method for modeling pure profiles and the generalized two-dimensional (2D) correlation spectroscopy data analysis for providing additional information on the dynamics of spectral features. MCR-ALS analysis shows that both the dynamics of the S* state, identified using the 2D correlation spectra, and the S-1 state develop on a different timescale than the relaxation of the vibrationally hot S-1v' state. Hot S-1v' and S* states are shown to have different species associated difference spectra. Results of our analysis indicate that the S* state observed in this work is not the hot S-1v' state but instead a separate singlet state.
关键词[WOS]: INTERNAL-CONVERSION ;  ELECTRONIC EXCITATIONS ;  ENERGY-TRANSFER ;  TARGET ANALYSIS ;  POLYENES ;  SYSTEMS ;  SPECTRA ;  PHOTOSYNTHESIS ;  NEUROSPORENE ;  DEACTIVATION
语种: 英语
WOS记录号: WOS:000326747200010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137966
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, BNLMS, Beijing 100190, Peoples R China
3.Inst Phys, Zagreb 10000, Croatia

Recommended Citation:
Vdovic, Silvije,Wang, Yingying,Li, Boxuan,et al. Excited state dynamics of beta-carotene studied by means of transient absorption spectroscopy and multivariate curve resolution alternating least-squares analysis[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2013,15(46):20026-20036.
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