Ultrafast nonradiative dynamics in electronically excited hexafluorobenzene by femtosecond time-resolved mass spectrometry
文献类型：期刊论文
| 作者 | Studzinski, Harald1; Zhang, Song1,2; Wang, Yanmei1,2; Temps, Friedrich1 |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
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| 出版日期 | 2008-04-28 |
| 卷号 | 128期号:16 |
| 英文摘要 | The fast nonradiative decay dynamics of the lowest two excited pi pi(*) electronic states (S(2) and S(3)) of hexafluorobenzene have been investigated by using femtosecond time-resolved time-of-flight mass spectrometry. The molecules were excited at wavelengths between 265 nm >=lambda(pump)>= 217 nm and probed by four- and three-photon ionization at lambda(probe)=775 nm. The observed temporal profiles exhibit two exponential decay times (tau(1)=0.54-0.1 ps and tau(2)=493-4.67 ps, depending on the excitation wavelength) and a superimposed coherent oscillation with vibrational frequency nu(osc)=97 cm(-1) and damping time tau(D) that is two to three times longer than the respective tau(1). The first decay component (tau(1)) is assigned to rapid radiationless transfer from the excited optically bright pi pi(*) electronic state (S(2) or S(3), respectively) through a conical intersection (CI) to the lower-lying optically dark pi sigma(*) state (S(1)) of the molecule; the second component (tau(2)) is attributed to the subsequent slower relaxation from the S(1) state back to the electronic ground state (S(0)). tau(2) dramatically decreases with increasing vibronic excitation energy up to the CI connecting the pi sigma(*) with the S(0) state. The coherent oscillation is identified as nuclear motion along the out-of-plane vibration nu(16a) (notation as for benzene), which has e(2u) symmetry and acts as coupling mode between the pi pi(*) and pi sigma(*) states. (c) 2008 American Institute of Physics. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Atomic, Molecular & Chemical |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | PHOTOFRAGMENT TRANSLATIONAL SPECTROSCOPY ; REPULSIVE (1)PI-SIGMA-ASTERISK STATES ; RADIATIONLESS DECAY ; PHOTOELECTRON-SPECTROSCOPY ; CONICAL INTERSECTIONS ; ORGANIC-MOLECULES ; ATOM ELIMINATION ; SINGLET-STATES ; BENZENE DIMER ; PYRROLE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000255456300035 |
| 公开日期 | 2015-10-13 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8088]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Univ Kiel, Inst Phys Chem, D-24098 Kiel, Germany 2.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 | Studzinski, Harald,Zhang, Song,Wang, Yanmei,et al. Ultrafast nonradiative dynamics in electronically excited hexafluorobenzene by femtosecond time-resolved mass spectrometry[J]. JOURNAL OF CHEMICAL PHYSICS,2008,128(16). |
| APA | Studzinski, Harald,Zhang, Song,Wang, Yanmei,&Temps, Friedrich.(2008).Ultrafast nonradiative dynamics in electronically excited hexafluorobenzene by femtosecond time-resolved mass spectrometry.JOURNAL OF CHEMICAL PHYSICS,128(16). |
| MLA | Studzinski, Harald,et al."Ultrafast nonradiative dynamics in electronically excited hexafluorobenzene by femtosecond time-resolved mass spectrometry".JOURNAL OF CHEMICAL PHYSICS 128.16(2008). |
入库方式： OAI收割
来源：武汉物理与数学研究所
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