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Excited state dynamics of beta-carotene studied by means of transient absorption spectroscopy and multivariate curve resolution alternating least-squares analysis
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
2013
DOI10.1039/c3cp53323a
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
关键词[WOS]INTERNAL-CONVERSION ; ELECTRONIC EXCITATIONS ; ENERGY-TRANSFER ; TARGET ANALYSIS ; POLYENES ; SYSTEMS ; SPECTRA ; PHOTOSYNTHESIS ; NEUROSPORENE ; DEACTIVATION
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.
语种英语
WOS记录号WOS:000326747200010
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被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/137966
专题中国科学院大连化学物理研究所
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
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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.
APA Vdovic, Silvije.,Wang, Yingying.,Li, Boxuan.,Qiu, Meng.,Wang, Xuefei.,...&Xia, Andong.(2013).Excited state dynamics of beta-carotene studied by means of transient absorption spectroscopy and multivariate curve resolution alternating least-squares analysis.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,15(46),20026-20036.
MLA Vdovic, Silvije,et al."Excited state dynamics of beta-carotene studied by means of transient absorption spectroscopy and multivariate curve resolution alternating least-squares analysis".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 15.46(2013):20026-20036.
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