Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state
Huang, DL; Liu, HT; Ning, CG; Dau, PD; Wang, LS
2017
发表期刊CHEMICAL PHYSICS
ISSN0301-0104
卷号482页码:374-383
文章类型期刊论文
摘要We report both non-resonant and resonant high-resolution photoelectron imaging of cryogenically cooled deprotonated uracil anions, N1[U-H](-), via vibrational levels of a dipole-bound excited state. Photodetachment spectroscopy of N1[U-H](-) was reported previously (Liu et al., 2014), in which forty-six vibrational autodetachment resonances due to the excited dipole-bound state were observed. By tuning the detachment laser to the vibrational levels of the dipole-bound state, we obtained high resolution resonant photoelectron spectra, which are highly non-Franck-Condon. The resonant photoelectron spectra reveal many Franck-Condon inactive vibrational modes, significantly expanding the capability of photoelectron spectroscopy. A total of twenty one fundamental vibrational frequencies for the N1[U-H](.) radical are obtained, including all eight low-frequency out-of-plane modes, which are forbidden in non-resonant photoelectron spectroscopy. Furthermore, the breakdown of the Delta v = -1 propensity rule is observed for autodetachment from many vibrational levels of the dipole-bound state, due to anharmonic effects. In particular, we have observed intramolecular electron rescattering in a number of resonant photoelectron spectra, leading to excitations of low-frequency vibrational modes. Further theoretical study may be warranted, in light of the extensive experimental data and new observations, to provide further insight into the autodetachment dynamics and vibronic coupling in dipole-bound states, as well as electron molecule interactions. (C) 2016 Elsevier B.V. All rights reserved.
关键词Dipole-bound State Deprotonated Uracil Photoelectron Imaging Resonant Photoelectron Spectroscopy Autodetachment
DOI10.1016/j.chemphys.2016.06.003
收录类别SCI
语种英语
WOS记录号WOS:000394634700044
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27435
专题中科院上海应用物理研究所2011-2018年
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Huang, DL,Liu, HT,Ning, CG,et al. Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state[J]. CHEMICAL PHYSICS,2017,482:374-383.
APA Huang, DL,Liu, HT,Ning, CG,Dau, PD,&Wang, LS.(2017).Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state.CHEMICAL PHYSICS,482,374-383.
MLA Huang, DL,et al."Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state".CHEMICAL PHYSICS 482(2017):374-383.
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