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Probing the vibrational spectroscopy of the deprotonated thymine radical by photodetachment and state-selective autodetachment photoelectron spectroscopy via dipole-bound states
Huang, DL; Liu, HT; Ning, CG; Zhu, GZ; Wang, LS
2015
Source PublicationCHEMICAL SCIENCE
Volume6Issue:5Pages:3129—3138
Subtype期刊文献
AbstractDeprotonated thymine can exist in two different forms, depending on which of its two N sites is deprotonated: N1[T-H](-) or N3[T-H](-). Here we report a photodetachment study of the N1[T-H](-) isomer cooled in a cryogenic ion trap and the observation of an excited dipole-bound state. Eighteen vibrational levels of the dipole-bound state are observed, and its vibrational ground state is found to be 238 +/- 5 cm(-1) below the detachment threshold of N1[T-H](-). The electron affinity of the deprotonated thymine radical (N1[T-H](center dot)) is measured accurately to be 26 322 +/- 5 cm(-1) (3.2635 +/- 0.0006 eV). By tuning the detachment laser to the sixteen vibrational levels of the dipole-bound state that are above the detachment threshold, highly non-Franck-Condon resonant-enhanced photoelectron spectra are obtained due to state- and mode-selective vibrational autodetachment. Much richer vibrational information is obtained for the deprotonated thymine radical from the photodetachment and resonant-enhanced photoelectron spectroscopy. Eleven fundamental vibrational frequencies in the low-frequency regime are obtained for the N1[T-H](center dot) radical, including the two lowest-frequency internal rotational modes of the methyl group at 70(-8) cm(-1) and 92(-5) cm(-1).
KeywordDissociative Electron-attachment Low-energy Electrons Acetaldehyde Enolate Anion Dna-strand Breaks Negative-ions Supported State Critical Binding Cross-sections Water Clusters Base Thymine
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24546
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Huang, DL,Liu, HT,Ning, CG,et al. Probing the vibrational spectroscopy of the deprotonated thymine radical by photodetachment and state-selective autodetachment photoelectron spectroscopy via dipole-bound states[J]. CHEMICAL SCIENCE,2015,6(5):3129—3138.
APA Huang, DL,Liu, HT,Ning, CG,Zhu, GZ,&Wang, LS.(2015).Probing the vibrational spectroscopy of the deprotonated thymine radical by photodetachment and state-selective autodetachment photoelectron spectroscopy via dipole-bound states.CHEMICAL SCIENCE,6(5),3129—3138.
MLA Huang, DL,et al."Probing the vibrational spectroscopy of the deprotonated thymine radical by photodetachment and state-selective autodetachment photoelectron spectroscopy via dipole-bound states".CHEMICAL SCIENCE 6.5(2015):3129—3138.
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