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Title: Vibrational state-selective autodetachment photoelectron spectroscopy from dipole-bound states of cold 2-hydroxyphenoxide: o − HO(C{sub 6}H{sub 4})O{sup −}

Abstract

We report a photodetachment and high-resolution photoelectron imaging study of cold 2-hydroxyphenoxide anion, o − HO(C{sub 6}H{sub 4})O{sup −}, cooled in a cryogenic ion trap. Photodetachment spectroscopy revealed a dipole-bound state (DBS) of the anion, 25 ± 5 cm{sup −1}, below the detachment threshold of 18784 ± 5 cm{sup −1} (2.3289 ± 0.0006 eV ), i.e., the electron affinity of the 2-hydroxyphenoxy radical o − HO(C{sub 6}H{sub 4})O{sup ⋅}. Twenty-two vibrational levels of the DBS are observed as resonances in the photodetachment spectrum. By tuning the detachment laser to these DBS vibrational levels, we obtain 22 high-resolution resonant photoelectron spectra, which are highly non-Franck-Condon due to mode-selective autodetachment and the Δv = − 1 propensity rule. Numerous Franck-Condon inactive vibrational modes are observed in the resonant photoelectron spectra, significantly expanding the vibrational information that is available in traditional high-resolution photoelectron spectroscopy. A total of 15 fundamental vibrational frequencies are obtained for the o − HO(C{sub 6}H{sub 4})O{sup ⋅}  radical from both the photodetachment spectrum and the resonant photoelectron spectra, including six symmetry-forbidden out-of-plane modes as a result of resonant enhancement.

Authors:
;  [1];  [1];  [2];  [3]
  1. Department of Chemistry, Brown University, Providence, Rhode Island 02912 (United States)
  2. (China)
  3. Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084 (China)
Publication Date:
OSTI Identifier:
22410268
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 142; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AFFINITY; ANIONS; DIPOLES; PHOTOELECTRON SPECTROSCOPY; RADICALS; RESOLUTION; RESONANCE; SPECTRA; VIBRATIONAL STATES

Citation Formats

Huang, Dao-Ling, Wang, Lai-Sheng, E-mail: Lai-Sheng-Wang@brown.edu, Liu, Hong-Tao, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, and Ning, Chuan-Gang. Vibrational state-selective autodetachment photoelectron spectroscopy from dipole-bound states of cold 2-hydroxyphenoxide: o − HO(C{sub 6}H{sub 4})O{sup −}. United States: N. p., 2015. Web. doi:10.1063/1.4916122.
Huang, Dao-Ling, Wang, Lai-Sheng, E-mail: Lai-Sheng-Wang@brown.edu, Liu, Hong-Tao, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, & Ning, Chuan-Gang. Vibrational state-selective autodetachment photoelectron spectroscopy from dipole-bound states of cold 2-hydroxyphenoxide: o − HO(C{sub 6}H{sub 4})O{sup −}. United States. doi:10.1063/1.4916122.
Huang, Dao-Ling, Wang, Lai-Sheng, E-mail: Lai-Sheng-Wang@brown.edu, Liu, Hong-Tao, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, and Ning, Chuan-Gang. Sat . "Vibrational state-selective autodetachment photoelectron spectroscopy from dipole-bound states of cold 2-hydroxyphenoxide: o − HO(C{sub 6}H{sub 4})O{sup −}". United States. doi:10.1063/1.4916122.
@article{osti_22410268,
title = {Vibrational state-selective autodetachment photoelectron spectroscopy from dipole-bound states of cold 2-hydroxyphenoxide: o − HO(C{sub 6}H{sub 4})O{sup −}},
author = {Huang, Dao-Ling and Wang, Lai-Sheng, E-mail: Lai-Sheng-Wang@brown.edu and Liu, Hong-Tao and Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800 and Ning, Chuan-Gang},
abstractNote = {We report a photodetachment and high-resolution photoelectron imaging study of cold 2-hydroxyphenoxide anion, o − HO(C{sub 6}H{sub 4})O{sup −}, cooled in a cryogenic ion trap. Photodetachment spectroscopy revealed a dipole-bound state (DBS) of the anion, 25 ± 5 cm{sup −1}, below the detachment threshold of 18784 ± 5 cm{sup −1} (2.3289 ± 0.0006 eV ), i.e., the electron affinity of the 2-hydroxyphenoxy radical o − HO(C{sub 6}H{sub 4})O{sup ⋅}. Twenty-two vibrational levels of the DBS are observed as resonances in the photodetachment spectrum. By tuning the detachment laser to these DBS vibrational levels, we obtain 22 high-resolution resonant photoelectron spectra, which are highly non-Franck-Condon due to mode-selective autodetachment and the Δv = − 1 propensity rule. Numerous Franck-Condon inactive vibrational modes are observed in the resonant photoelectron spectra, significantly expanding the vibrational information that is available in traditional high-resolution photoelectron spectroscopy. A total of 15 fundamental vibrational frequencies are obtained for the o − HO(C{sub 6}H{sub 4})O{sup ⋅}  radical from both the photodetachment spectrum and the resonant photoelectron spectra, including six symmetry-forbidden out-of-plane modes as a result of resonant enhancement.},
doi = {10.1063/1.4916122},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 12,
volume = 142,
place = {United States},
year = {2015},
month = {3}
}