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题名: Ultrafast excited-state dynamics of 2,4-dimethylpyrrole
作者: Yang, Dongyuan1, 2;  Chen, Zhichao1;  He, Zhigang1;  Wang, Hengding1, 2;  Min, Yanjun1, 2;  Yuan, Kaijun1;  Dai, Dongxu1, 3;  Wu, Guorong1, 3;  Yang, Xueming1, 3
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2017-11-21
DOI: 10.1039/c7cp06292c
卷: 19, 期:43, 页:29146-29152
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The ultrafast excited-state dynamics of 2,4-dimethylpyrrole following excitation at wavelengths in the range of 255.8-199.7 nm are studied using the time-resolved photoelectron imaging method. It is found that excitation at longer wavelengths (255.8, 250.0, 246.0 and 242.0 nm) results in population of the S-1((1)pi sigma*) state, which decays out of the photoionization window in less than 30 fs. At 237.7 nm, the second 1 ps* state is excited, which decays in about 130 fs. At shorter pump wavelengths (231.8, 224.8, 217.5 and 199.7 nm), the assignments are less clear-cut. We tentatively assign the initially photoexcited states to the (1)pi 3p Rydberg states, which decay in about 60 fs, with internal conversion to the S1(1 ps*) state as one of the decay channels. The lifetimes of these (1)pi 3p Rydberg states vary little with the pump wavelengths in this wavelength range.
关键词[WOS]: REPULSIVE (1)PI-SIGMA-ASTERISK STATES ;  ATOM ELIMINATION ;  PYRROLE ;  PHOTODISSOCIATION ;  DISSOCIATION ;  MOLECULES ;  PHOTOCHEMISTRY ;  SPECTROSCOPY ;  BIOMOLECULES ;  SYMMETRY
语种: 英语
WOS记录号: WOS:000414773100014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149791
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China

Recommended Citation:
Yang, Dongyuan,Chen, Zhichao,He, Zhigang,et al. Ultrafast excited-state dynamics of 2,4-dimethylpyrrole[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2017,19(43):29146-29152.
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