Photodetachment and resonant photoelectron spectroscopy of cryogenically-cooled phenoxide anions via dipole-bound excited states
Qian, Chen-hui
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https://hdl.handle.net/2142/100531
Description
Title
Photodetachment and resonant photoelectron spectroscopy of cryogenically-cooled phenoxide anions via dipole-bound excited states
Author(s)
Qian, Chen-hui
Contributor(s)
Wang, Lai-Sheng
Zhu, Guo-Zhu
Issue Date
2018-06-22
Keyword(s)
Ions
Abstract
The phenoxide anion (C6H5O – ), with a large dipole moment of 4.0 D for its neutral core, can support an excited dipole-bound state (DBS) 97 cm−1below the electron detachment threhold [Liu et al. Angew. Chem. Int. Ed. 52, 8976- 8979 (2013)]. The vibrational mode-specific autodetachments from the vibrational levels of the DBS were first discovered in this system by high-resolution resonant photoelectron (PE) imaging. Here, we report a photodetachment spectrum of the phenoxide anion up to 2000 cm−1 above the detachment threshold. Several new vibrational peaks are observed due to autodetachment from combinational levels of the DBS. The corresponding resonant PE spectra show a clear peak due to the lowest-frequency bending mode, suggesting the possibility of a slight nonplanar structure for the phenoxy radical.
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