Ultrafast excited-state dynamics associated with the photoisomerization of trans-4-diethylaminoazobenzene in solution
文献类型：期刊论文
| 作者 | Wang, Yaping; Zhang, Song; Sun, Simei; Liu, Kai; Zhang, Bing |
| 刊名 | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
 |
| 出版日期 | 2015-08-15 |
| 卷号 | 309页码:1-7 |
| 英文摘要 | The ultrafast dynamics of S-2-excited trans-4-diethylaminoazobenzene (trans-4-DEAAB) is investigated in solution by femtosecond transient absorption spectroscopy combined with quantum chemical calculations. Following excitation, the internal conversion from the S-2 state to the Si state occurs directly with time constant of similar to 0.10 ps. The cis isomer is observed by the partial recovery of ground-state bleach in 450-480 nm and the permanent positive absorption in 480-550 nm. The time constant of <1 ps is assigned to the lifetime of the Si state which decays by isomerization to the cis-isomer hot So state and internal conversion to the trans-isomer hot So state. The photoisomerization is deduced by inversion mechanism because of the independence between the viscosity and the Si-state lifetime. The vibrational cooling of the hot So state of cis-4-DEAAB occurs with similar to 15 ps in acetone but is shortened to 6 ps in alcohols solvents. This shortening is due to the H-bond which forms easily in protic solvent and accelerates the flow of vibrational energy between solute and solvent. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | TRANSIENT ABSORPTION-SPECTROSCOPY ; N-PI-ASTERISK ; SOLVENT POLARITY ; AZOBENZENE ; PEPTIDE ; DNA ; PHOTOREGULATION ; PHOTOCHEMISTRY ; FLUORESCENCE ; RELAXATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000356739100001 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/4851]  |
| 专题 | 武汉物理与数学研究所_原子分子光物理研究部 |
| 作者单位 | Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yaping,Zhang, Song,Sun, Simei,et al. Ultrafast excited-state dynamics associated with the photoisomerization of trans-4-diethylaminoazobenzene in solution[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2015,309:1-7. |
| APA | Wang, Yaping,Zhang, Song,Sun, Simei,Liu, Kai,&Zhang, Bing.(2015).Ultrafast excited-state dynamics associated with the photoisomerization of trans-4-diethylaminoazobenzene in solution.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,309,1-7. |
| MLA | Wang, Yaping,et al."Ultrafast excited-state dynamics associated with the photoisomerization of trans-4-diethylaminoazobenzene in solution".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 309(2015):1-7. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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