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Unraveling the electronic relaxation dynamics in photoexcited 2,4-difluoroaniline via femtosecond time-resolved photoelectron imaging

文献类型：期刊论文

作者Ling, Fengzi1,2; Li, Shuai1,2; Wei, Jie1,2; Liu, Kai1,2; Wang, Yanmei1,2; Zhang, Bing1,2
刊名JOURNAL OF CHEMICAL PHYSICS
出版日期2018-04-14
卷号148期号:14
ISSN号0021-9606
DOI10.1063/1.5024255
文献子类Article
英文摘要Time-resolved photoelectron imaging is employed to investigate the relaxation dynamics of the lowest two excited electronic states S-1(pi pi*) and S-2(pi 3s/pi sigma*) in 2,4-difluoroaniline (24DFA). As the S-1(pi pi*) state is populated directly following 289 nm excitation, the population undergoes ultrafast intramolecular vibrational redistribution on a 540 fs time scale, followed by efficient intersystem crossing from S-1(pi pi*) to the triplet state within 379 ps, and the subsequent slower deactivation process of the triplet state. For excitation to the S-2(pi 3s/pi sigma*) state at 238 nm, the population probably bifurcates into two decay channels. The dominant channel with 84 fs involves ultrafast internal conversion to the S-1(pi pi*) state, from which it relaxes to the electronic ground state on a 116 ps time scale. The other appears to involve motion along the S-2(pi 3s/pi sigma*) potential energy surface. Our data also determine experimentally the electronic energies of S-2(pi 3s/pi sigma*), S-3(pi pi*), and several Rydberg states in 24DFA. Published by AIP Publishing.
WOS关键词ULTRAFAST DYNAMICS ; EXCITED-STATE ; ANILINE ; SPECTROSCOPY ; UV ; FLUOROANILINE ; SPECTRA ; ENERGY ; BASES
WOS研究方向Chemistry ; Physics
语种英语
WOS记录号WOS:000430128600024
出版者AMER INST PHYSICS
资助机构National Natural Science Foundation of China(21327804 ; National Natural Science Foundation of China(21327804 ; 21773299 ; 21773299 ; 21573279 ; 21573279 ; 91121006 ; 91121006 ; 11774385 ; 11774385 ; 21503270 ; 21503270 ; 11674355 ; 11674355 ; 21303255 ; 21303255 ; 11574351) ; 11574351) ; National Natural Science Foundation of China(21327804 ; National Natural Science Foundation of China(21327804 ; 21773299 ; 21773299 ; 21573279 ; 21573279 ; 91121006 ; 91121006 ; 11774385 ; 11774385 ; 21503270 ; 21503270 ; 11674355 ; 11674355 ; 21303255 ; 21303255 ; 11574351) ; 11574351) ; National Natural Science Foundation of China(21327804 ; National Natural Science Foundation of China(21327804 ; 21773299 ; 21773299 ; 21573279 ; 21573279 ; 91121006 ; 91121006 ; 11774385 ; 11774385 ; 21503270 ; 21503270 ; 11674355 ; 11674355 ; 21303255 ; 21303255 ; 11574351) ; 11574351) ; National Natural Science Foundation of China(21327804 ; National Natural Science Foundation of China(21327804 ; 21773299 ; 21773299 ; 21573279 ; 21573279 ; 91121006 ; 91121006 ; 11774385 ; 11774385 ; 21503270 ; 21503270 ; 11674355 ; 11674355 ; 21303255 ; 21303255 ; 11574351) ; 11574351)
源URL[http://ir.wipm.ac.cn/handle/112942/12962]  
专题中国科学院武汉物理与数学研究所
通讯作者Zhang, Bing
作者单位1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Ling, Fengzi,Li, Shuai,Wei, Jie,et al. Unraveling the electronic relaxation dynamics in photoexcited 2,4-difluoroaniline via femtosecond time-resolved photoelectron imaging[J]. JOURNAL OF CHEMICAL PHYSICS,2018,148(14).
APA Ling, Fengzi,Li, Shuai,Wei, Jie,Liu, Kai,Wang, Yanmei,&Zhang, Bing.(2018).Unraveling the electronic relaxation dynamics in photoexcited 2,4-difluoroaniline via femtosecond time-resolved photoelectron imaging.JOURNAL OF CHEMICAL PHYSICS,148(14).
MLA Ling, Fengzi,et al."Unraveling the electronic relaxation dynamics in photoexcited 2,4-difluoroaniline via femtosecond time-resolved photoelectron imaging".JOURNAL OF CHEMICAL PHYSICS 148.14(2018).

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来源：武汉物理与数学研究所

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