Ultrafast Ground-State Intramolecular Proton Transfer in Diethylaminohydroxyflavone Resolved with Pump-Dump-Probe Spectroscopy
文献类型：期刊论文
| 作者 | Kuang, Zhuoran1,2; Guo, Qanjin1; Wang, Xian1,2; Song, Hongwei1,2; Maroncelli, Mark3; Xia, Andong1,2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY LETTERS
 |
| 出版日期 | 2018-08-02 |
| 卷号 | 9期号:15页码:4174-4181 |
| ISSN号 | 1948-7185 |
| DOI | 10.1021/acs.jpclett.8b01826 |
| 英文摘要 | 4'-N,N-Diethylamino-3-hydroxyflavone (DEAHF), due to excited-state intramolecular proton transfer (ESIPT) reaction, exhibits two solvent-dependent emission bands. Because of the slow formation and fast decay of the ground-state tautomer, its population does not accumulate enough for its detection during the normal photocycle. As a result, the details of the ground-state intramolecular proton-transfer (GSIPT) reaction have remained unknown. The present work uses femtosecond pump dump probe spectroscopy to prepare the short-lived ground-state tautomer and track this GSIPT process in solution. By simultaneously measuring femtosecond pump probe and pump dump probe spectra, ultrafast kinetics of the ESIPT and GSIPT reactions are obtained. The GSIPT reaction is shown to be a solvent-dependent irreversible two-state process in two solvents, with estimated time constants of 1.7 ps in toluene and 10 ps in the more polar tetrahydrofuran. These results are of great value in both fully describing the photocycle of this four-level proton transfer molecule and for providing a deeper understanding of dynamical solvent effects on tautomerization. |
| 语种 | 英语 |
| WOS记录号 | WOS:000440956500006 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41931]  |
| 专题 | 化学研究所_光化学实验室 |
| 通讯作者 | Maroncelli, Mark; Xia, Andong |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Key Lab Photochem, BNLMS, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Penn State Univ, Dept Chem, University Pk, PA 16802 USA |
| 推荐引用方式 GB/T 7714 | Kuang, Zhuoran,Guo, Qanjin,Wang, Xian,et al. Ultrafast Ground-State Intramolecular Proton Transfer in Diethylaminohydroxyflavone Resolved with Pump-Dump-Probe Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2018,9(15):4174-4181. |
| APA | Kuang, Zhuoran,Guo, Qanjin,Wang, Xian,Song, Hongwei,Maroncelli, Mark,&Xia, Andong.(2018).Ultrafast Ground-State Intramolecular Proton Transfer in Diethylaminohydroxyflavone Resolved with Pump-Dump-Probe Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,9(15),4174-4181. |
| MLA | Kuang, Zhuoran,et al."Ultrafast Ground-State Intramolecular Proton Transfer in Diethylaminohydroxyflavone Resolved with Pump-Dump-Probe Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 9.15(2018):4174-4181. |
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来源：化学研究所
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