中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Ultrafast internal conversion and vibrational relaxation in sing let excited-state all-trans-beta-carotene as revealed by femtosecond time-resolved stimulated Raman spectroscopy

文献类型:期刊论文

作者Xiao-Hui, Zhao1,2,3; Fei, Ma1,3; Yi-Shi, Wu1,3; Xi-Cheng, Ai3; Jian-Ping, Zhang1,3
刊名ACTA PHYSICA SINICA
出版日期2008
卷号57期号:1页码:298-306
关键词Femtosecond Time-resolved Raman Spectroscopy All-trans-beta-carotene Excited-state Internal Conversion Vibrational Relaxation
ISSN号1000-3290
英文摘要A femtosecond time-resolved stimulated Raman scattering (FSRS) apparatus was built, and was used to study the ultrafast internal conversion and vibrational relaxation processes between the singlet excited states of all-trans-beta- carotene in solution. The FSRS apparatus, constructed on the basis of a three-pulse pump-probe scheme, achieved a time resolution of 150 fs, a spectral resolution of 23.7 cm(-1), and a detection spectral window of 300-4000 cm(-1). The FSRS results are interpreted in terms of a serial internal-conversion scheme between the low-lying singlet excited states, i.e. S-2 --> S-X --> S-1 --> S-0. Spectral dynamics analysis and kinetics analysis proved that the intra-molecular vibrational relaxation in the S-1 state proceeds on a time scale of 0.3-0.6 ps, while the 'hot' S-1 state decays with a time constant similar to the lifetime of this state (similar to 11 ps). Furthermore, the time scale of intra-molecular vibrational relaxation and vibrational cooling processes in the S-0 state are shown to be similar to 0.3 and similar to 15 ps, respectively. These results are useful for a deeper insight into the light-harvesting function of carotenoids in photosynthetic organisms.
语种英语
WOS记录号WOS:000252344800049
出版者CHINESE PHYSICAL SOC
源URL[http://ir.iccas.ac.cn/handle/121111/63273]  
专题中国科学院化学研究所
通讯作者Jian-Ping, Zhang
作者单位1.Chinese Acad Sci, Inst Chem, BNLMS, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China
2.Hebei Univ, Coll Phys Sci & Technol, Baoding 071002, Peoples R China
3.Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China
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Xiao-Hui, Zhao,Fei, Ma,Yi-Shi, Wu,et al. Ultrafast internal conversion and vibrational relaxation in sing let excited-state all-trans-beta-carotene as revealed by femtosecond time-resolved stimulated Raman spectroscopy[J]. ACTA PHYSICA SINICA,2008,57(1):298-306.
APA Xiao-Hui, Zhao,Fei, Ma,Yi-Shi, Wu,Xi-Cheng, Ai,&Jian-Ping, Zhang.(2008).Ultrafast internal conversion and vibrational relaxation in sing let excited-state all-trans-beta-carotene as revealed by femtosecond time-resolved stimulated Raman spectroscopy.ACTA PHYSICA SINICA,57(1),298-306.
MLA Xiao-Hui, Zhao,et al."Ultrafast internal conversion and vibrational relaxation in sing let excited-state all-trans-beta-carotene as revealed by femtosecond time-resolved stimulated Raman spectroscopy".ACTA PHYSICA SINICA 57.1(2008):298-306.

入库方式: OAI收割

来源:化学研究所

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