Triplet excitation transfer between carotenoids in the LH2 complex from photosynthetic bacterium Rhodopseudomonas palustris
文献类型：期刊论文
| 作者 | Feng, J; Wang, Q; Wu, YS; Ai, XC; Zhang, XJ; Huang, YG; Zhang, XK; Zhang, JP |
| 刊名 | PHOTOSYNTHESIS RESEARCH
 |
| 出版日期 | 2004 |
| 卷号 | 82期号:1页码:83-94 |
| 关键词 | Bacteriochlorophyll Carotenoid Light-harvesting Antenna Complex Time-resolved Spectroscopy Triplet Excitation Transfer |
| ISSN号 | 0166-8595 |
| 英文摘要 | We have studied, by means of sub-microsecond time-resolved absorption spectroscopy, the triplet-excited state dynamics of carotenoids (Cars) in the intermediate-light adapted LH2 complex (ML - LH2) from Rhodopseudomonas palustris containing Cars with different numbers of conjugated double bonds. Following pulsed photo-excitation at 590 nm at room temperature, rapid spectral equilibration was observed either as a red shift of the isosbestic wavelength on a time scale of 0.6 - 1.0 mus, or as a fast decay in the shorter-wavelength side of the T-n <-- T-1 absorption of Cars with a time constant of 0.5 - 0.8 μs. Two major spectral components assignable to Cars with 11 and 12 conjugated double bonds were identified. The equilibration was not observed in the ML - LH2 at 77 K, or in the LH2 complex from Rhodobacter sphaeroides G1C containing a single type of Car. The unique spectral equilibration was ascribed to temperature-dependent triplet excitation transfer among different Car compositions. The results suggest that Cars of 11 and 12 conjugated bonds, both in close proximity of BChls, may coexist in an α,β-subunit of the ML - LH2 complex. |
| 语种 | 英语 |
| WOS记录号 | WOS:000223741100007 |
| 出版者 | KLUWER ACADEMIC PUBL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/82285]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, JP |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Biophys, Natl Lab Biomacromol, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, J,Wang, Q,Wu, YS,et al. Triplet excitation transfer between carotenoids in the LH2 complex from photosynthetic bacterium Rhodopseudomonas palustris[J]. PHOTOSYNTHESIS RESEARCH,2004,82(1):83-94. |
| APA | Feng, J.,Wang, Q.,Wu, YS.,Ai, XC.,Zhang, XJ.,...&Zhang, JP.(2004).Triplet excitation transfer between carotenoids in the LH2 complex from photosynthetic bacterium Rhodopseudomonas palustris.PHOTOSYNTHESIS RESEARCH,82(1),83-94. |
| MLA | Feng, J,et al."Triplet excitation transfer between carotenoids in the LH2 complex from photosynthetic bacterium Rhodopseudomonas palustris".PHOTOSYNTHESIS RESEARCH 82.1(2004):83-94. |
入库方式： OAI收割
来源：化学研究所
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