Radical cation generation from singlet and triplet excited states of all-trans-lycopene in chloroform
文献类型：期刊论文
| 作者 | Han, RM; Wu, YS; Feng, J; Ai, XC; Zhang, JP; Skibsted, LH |
| 刊名 | PHOTOCHEMISTRY AND PHOTOBIOLOGY
 |
| 出版日期 | 2004-09-01 |
| 卷号 | 80期号:2页码:326-333 |
| ISSN号 | 0031-8655 |
| 英文摘要 | On direct photoexcitation, subpicosecond time-resolved absorption spectroscopy revealed that the 1B(u)-type singlet excited state of all-trans-lycopene in chloroform was about seven times more efficient than all-trans-beta-carotene in generating the radical cation. The time constant of radical cation generation from the 1B(u)-type state was found to be similar to0.14 ps, a value that was comparable for the two carotenoids. On anthracene-sensitized triplet excitation, radical cation generation was found to be much less efficient for lycopene than for beta-carotene. A slow rising phase (20-30 mus) in the bleaching of ground-state absorption was common for both lycopene and beta-carotene in chloroform and was ascribed to an efficient secondary reaction with a solvent radical leading to the formation of carotenoid radical cations. The reverse ordering in the tendency of the excited states of different multiplicities for the two carotenoids to generate radical cations is discussed in relation to the two carotenoids as scavengers of free radicals. |
| 语种 | 英语 |
| WOS记录号 | WOS:000225158400027 |
| 出版者 | AMER SOC PHOTOBIOLOGY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/81651]  |
| 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, State Key Lab Struct Chem Unstable & Stable Speci, Inst Chem, Beijing 100080, Peoples R China 2.Royal Vet & Agr Univ, Dept Dairy & Food Sci, Frederiksberg C, Denmark |
| 推荐引用方式 GB/T 7714 | Han, RM,Wu, YS,Feng, J,et al. Radical cation generation from singlet and triplet excited states of all-trans-lycopene in chloroform[J]. PHOTOCHEMISTRY AND PHOTOBIOLOGY,2004,80(2):326-333. |
| APA | Han, RM,Wu, YS,Feng, J,Ai, XC,Zhang, JP,&Skibsted, LH.(2004).Radical cation generation from singlet and triplet excited states of all-trans-lycopene in chloroform.PHOTOCHEMISTRY AND PHOTOBIOLOGY,80(2),326-333. |
| MLA | Han, RM,et al."Radical cation generation from singlet and triplet excited states of all-trans-lycopene in chloroform".PHOTOCHEMISTRY AND PHOTOBIOLOGY 80.2(2004):326-333. |
入库方式： OAI收割
来源：化学研究所
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