Gaseous dibenzo-7-phosphanorbornadiene P-sulfide anions APS− (A=C14H10 or anthracene) were generated via electrospray ionization, and characterized by magnetic-bottle photoelectron spectroscopy, velocity-map imaging (VMI) photoelectron spectroscopy, and quantum chemical calculations. The electron affinity (EA) and spin-orbit (SO) splitting of the APS• radical are determined from the photoelectron spectra and Franck-Condon factor simulations to be EA=(2.62±0.05) eV and SO splitting=(43±7) meV. VMI photoelectron images show strong and sharp peaks near the detachment threshold with an identical electron kinetic energy (eKE) of 17.9 meV at three different detachment wavelengths, which are therefore assigned to autodetachment from dipole-bound anion states. The B3LYP/6-31++G(d,p) calculations indicate APS• has a dipole moment of 3.31 Debye, large enough to support a dipole-bound electron.
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August 2018
Research Article|
August 01 2018
Magnetic-Bottle and velocity-map imaging photoelectron spectroscopy of APS− (A=C14H10 or anthracene): Electron structure, spin-orbit coupling of APS•, and dipole-bound state of APS−†
Qin-qin Yuan;
Qin-qin Yuan
‡
a
Physical Sciences Division, Pacific Northwest National Laboratory
, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
b
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
c
University of Chinese Academy of Sciences
, Beijing 100049, China
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Zheng Yang;
Zheng Yang
a
Physical Sciences Division, Pacific Northwest National Laboratory
, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
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Ren-zhong Li;
Ren-zhong Li
‡
a
Physical Sciences Division, Pacific Northwest National Laboratory
, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
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Wesley J. Transue;
Wesley J. Transue
d
Department of Chemistry, Massachusetts Institute of Technology
, Cambridge, MA 02139, USA
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Zhi-peng Li;
Zhi-peng Li
‡
a
Physical Sciences Division, Pacific Northwest National Laboratory
, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
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Ling Jiang;
Ling Jiang
b
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
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Niranjan Govind;
Niranjan Govind
e
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
, P. O. Box 999, MS K8-91, Richland WA 99352, USA
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Christopher C. Cummins;
Christopher C. Cummins
*
d
Department of Chemistry, Massachusetts Institute of Technology
, Cambridge, MA 02139, USA
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Xue-Bin Wang
Xue-Bin Wang
*
a
Physical Sciences Division, Pacific Northwest National Laboratory
, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
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Chin. J. Chem. Phys. 31, 463–470 (2018)
Article history
Received:
May 24 2018
Accepted:
June 07 2018
Citation
Qin-qin Yuan, Zheng Yang, Ren-zhong Li, Wesley J. Transue, Zhi-peng Li, Ling Jiang, Niranjan Govind, Christopher C. Cummins, Xue-Bin Wang; Magnetic-Bottle and velocity-map imaging photoelectron spectroscopy of APS− (A=C14H10 or anthracene): Electron structure, spin-orbit coupling of APS•, and dipole-bound state of APS−. Chin. J. Chem. Phys. 1 August 2018; 31 (4): 463–470. https://doi.org/10.1063/1674-0068/31/cjcp1805114
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