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
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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 |
推荐引用方式 GB/T 7714 | 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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