1. MICROWAVE OBSERVATION OF THE O2-CONTAINING COMPLEX, O2-HCl
Frank E. Marshall, Nicole Moon, Thomas D. Persinger, Richard Dawes, and G. S. Grubbs II
72nd International Symposium on Molecular Spectroscopy
June 20-24, 2016, Urbana-Champaign, IL, USA; TE04

2. O2 Complexes Are Rare
Making up 21% of our atmosphere, experimental O2 complex studies are quite rare- Stew Novick’s Bibliography1: Ar-O2, DCl-O25, SO2-O2, N2O-O2, and O2-O2
Unfinished work of O2-OCS by Brian Howard2 and
H2O-O2 by Endo and coworkers3
HF-O2 by Leopold and coworkers6 and Fawzy and coworkers7
71ST ISMS WA10: CO-O2, Bob McKellar and coworkers
71st ISMS FE09: H2/HD/D2-O2, Paul Raston and Hayley Bunn4
71st ISMS WG14: CO-O2, Grubbs and coworkers
Stew Novick.
Brian Howard, Private Communication.
Y. Kasai, E. Dupuy, R. Saito, K. Hashimoto, A. Sabu, S. Kondo, Y. Sumiyoshi, and Y. Endo, Atmos. Chem. Phys., 11 (2011),
H. Bunn, T. Bennett, A. Karayilan, and P. Raston, Astrophy. J., 799 (2015) 65.
Robert Beaudet, but can only find a link to DOE Summary…
S. Wu, G. Sedo, E. M. Grumstrup, K. R. Leopold, J. Chem. Phys., 127 (2007)
W. M. Fawzy, C. M. Lovejoy, D. J. Nesbitt, and J. T. Hougen, J. Chem. Phys., 117 (2002) 693.

3. Pertinent Previous Work

4. Experiment
CP-FTMW: 2% HCl/10% O2 in Ar, 1.5 atm backing pressure, 5 Hz gas pulse, 5 FIDs/gas pulse, 1 million FIDs, ~20 hrs averaging, 6-12 GHz
Used 0.85 atm, 2% HCl in Ar 2 million FIDs for comparison
FTMW: Same Gas Mix, Measured possible transitions with Helmholtz coils on and off

5. CP-FTMW Results

6. CP-FTMW Results

7. CP-FTMW Results

8. FTMW Results

9. Interpreting Data Real Problem
Experiments: continue to do measurements without the Earth’s magnetic field on FTMW
First fits of any O2-complex to be achieved in SPFIT/SPCAT

10. Interpreting Data Real Problem, start with O2-HF
Fits with O2-HF have stagnated making O2-HCl assignments a challenge
Bringing in Brian Drouin for help with quantum number assignment and interpretation

11. O2-HCl vs.O2-HF 310 cm-1 wells with 120 cm-1 barrier
Semirigid Effective Hamiltonian fit O2-HF
S. Wu, G. Sedo, E. M. Grumstrup, and K. R. Leopold. J. Chem. Phys. 127 (2007)

12. Additional Goodies
Second known measurement of a 38Ar-containing species in natural abundance in microwave!1
Manuscript to be submitted very soon to Chem. Phys. Lett. with Kisiel, Pate, and others.
1. B. L. Cousins, S. C. O’Brien, J. M. Lisy, J. Phys. Chem. 88 (1984) 5142.

13. Additional Goodies

14. Acknowledgements GSGII: Missouri S&T Startup; UM Research Board Grant
Dawes: NSF  CHE