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Vibronic interaction in CO3- photo-detachment: Jahn-Teller effects beyond structural distortion and general formalisms for vibronic Hamiltonians in trigonal symmetries

Journal Article · · Physical Chemistry Chemical Physics
DOI:https://doi.org/10.1039/c9cp01352k· OSTI ID:1571281
 [1];  [2];  [3];  [4];  [5];  [1]
  1. Carleton University
  2. University of Florida
  3. Queen's University (Ontario)
  4. Pennsylvania State University
  5. BATTELLE (PACIFIC NW LAB)
+ Show Author Affiliations
Recently, the negative ion photoelectron spectrum of CO?? 3 was reported and the second lowest energy band is assigned to the close-lying 3E00 and 3E0 states that undergo Jahn-Teller distortions (Chem. Sci. 2016, 7, 1142). This assignment is based on the Born-Oppenheimer approximation and the assumption of a static Jahn-Teller eect that distorts the CO3 structure from D3h to C2v symmetry. In this work, we employ a 4 states 6 modes vibronic coupling model to investigate the triplet band and uncover the dynamic and non-adiabatic nature of the Jahn-Teller and pseudo- Jahn-Teller interactions in the triplet states. The apparent four peaks progression in the band is studied in depth, and is found to consist of more than four transitions. By comparing the simulated spectra using the full model and the reduced-dimension 2 states 2 modes models, we characterize those transitions. The origin of the complexities of the spectrum is traced to the C-O nonbonding character of the orbitals that lose electron in the photo-detachment process. Methodology-wise, we derive and present the formalisms for arbitrary order expansions of all bimodal trigonal Jahn-Teller and pseudo-Jahn-Teller Hamiltonians in vibrational coordinates.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1571281
Report Number(s):
PNNL-SA-140258
Journal Information:
Physical Chemistry Chemical Physics, Journal Name: Physical Chemistry Chemical Physics Journal Issue: 17 Vol. 21
Country of Publication:
United States
Language:
English

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