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Charles Markus

Photo of Charles Markus

Address:

4800 Oak Grove Drive

Pasadena, CA 91109

Curriculum Vitae:

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Member of:

Laboratory Studies And Atmospheric Observations

Biography

Dr. Charles Markus is a NASA Postdoctoral Fellow in the Earth Science Laboratory Studies and Atmospheric Observations group. His background is in developing high-resolution instrumentation for investigating the structure and reactivity of highly reactive molecules such as radical and molecular ions. This has included cavity-enhanced spectroscopy, cryogenic action spectroscopy, and frequency modulation spectroscopy. In the photochemistry and kinetics group, he is investigating reactions between free radicals which play important roles in our atmosphere and that of other planetary bodies.

Education

  • BS in Chemistry and Mathematics at the University of Wisconsin-Madison
  • PhD in Chemistry at the University of Illinois at Urbana-Champaign under Prof. Benjamin McCall

Professional Experience

  • 2020-2022: The California Institute of Technology, Division of Chemistry and Chemical Engineering, A. O. Beckman Postdoctoral Fellow
  • 2020: Universität zu Köln, Astrophysik I. Physik, Postdoctoral Researcher
  • 2013: JPL USRP Intern

Research Interests

Radical Kinetics, High-resolution infrared spectroscopy, astrochemistry

Selected Awards

  • 2023: NASA Postdoctoral Fellowship
  • 2020: A.O. Beckman Postdoctoral Fellowship
  • 2016: NASA Earth and Space Science Fellowship

Selected Publications

  1. Cavity-enhanced dual-comb spectroscopy in the molecular fingerprint region using free-running quantum cascade lasers, C. R. Markus, J. Hayden, D. I. Herman, P. A. Kocheril, D. C. Ober, T. Bashiri, M. Mangold, M. Okumura, submitted, (2023).
  2. Bimolecular Reaction of Methyl-Ethyl Substituted Criegee Intermediate with SO2, M. Zou, T. Liu, M. F. Vansco, C. A. Sojdak, C. R. Markus, R. Almeida, K. Au, L. Sheps, D. L. Osborn, F. A. F. WIniberg, C. J. Percival, C. A. Taatjes, S. J. Klippenstein, M. I Lester, R. L. Caravan, submitted, (2023).
  3. OH Roaming and Beyond in the Unimolecular Decay of the Methyl-Ethyl-Substituted Criegee Intermediate: Observations and Predictions, T. Liu, S. N. Elliott, M. Zou, M. F. Vansco, C. A. Sojdak, C. R. Markus, R. Almeida, K. Au, L. Sheps, D. L. Osborn, F. A. F. WIniberg, C. J. Percival, C. A. Taatjes, R. L. Caravan, S. J. Klippenstein, M. I Lester, J. Amer. Chem. Soc., (2023), 145, 19405–19420. DOI: 10.1021/jacs.3c07126
  4. Mid-Infrared Cross-Comb Spectroscopy, M. Liu, R. M. Gray, L. Costa, C. R. Markus,A. Roy, A. Marandi, Nature Comm., (2023), 14, 1044. DOI: 10.1038/s41467-023-36811-7
  5. Cavity-Enhanced Vernier Spectroscopy with a Chip-Scale Mid-Infrared Frequency Comb, L. A. Sterczewski, T.-L. Chen, D. C. Ober, C. R. Markus, C. L. Canedy, I. Vurgaftman, C. Frez, J. R. Meyer, M. Okumura, M. Bagheri, ACS Photonics, (2022). DOI: 10.1021/acsphotonics.1c01849
  6. Reaction of methane and UV-activated perchlorate: Relevance to heterogeneous loss of methane in the atmosphere of Mars, X. Zhang, D. Berkinsky, C. R. Markus, S. R. Chitturi, F. J. Grieman, M. Okumura, Y. Luo, Y. L. Yung, S. P. Sander, Icarus, (2022), 376, 114832. DOI: 10.1016/j.icarus.2021.114832
  7. Mid-Infrared Cross-Comb Spectroscopy, M. Liu, R. M. Gray, A. Roy, C. R. Markus, A. Marandi, arXiv:2107.08333 [pysics.optics], (2021). abs/2107.08333
  8. The fundamental rotational transition of NO+, O. Asvany, C. R. Markus, A. R. Kobayashi, S. Schlemmer, C. Lauzin, Journal of Molecular Spectroscopy, (2021), 378, 111447. DOI: 10.1016/j.jms.2021.111447
  9. Pure Rotational Spectrum of CCl+, O. Asvany, C. R. Markus, K. Nagamori, J. Furuta, K. Kobayashi, S. Schlemmer, S. Thorwirth, The Astrophysical Journal, (2021), 910, 15. DOI: 10.3847/1538-4357/abe536
  10. High-resolution infrared action spectroscopy of the fundamental vibrational band of CN+, J. L. Doménech, O. Asvany, C. R. Markus, S. Schlemmer, S. Thorwirth, Journal of Molecular Spectroscopy, (2020), 374, 111375. DOI: 10.1016/j.jms.2020.111375
  11. Vibrational excitation hindering an ion-molecule reaction: The c-C3H2+-H2 collision complex, C. R. Markus, O. Asvany, T. Salomon, P. C. Schmid, S. Brünken, F. Lipparini, J. Gauss, S. Schlemmer, Physical Review Letters, (2020), 124, 233401. DOI: 10.1103/PhysRevLett.124.233401
  12. High-resolution rovibrational spectroscopy of c-C3H+2 : The ν7 C-H antisymmetric stretching band, O. Asvany, C. R. Markus, T. Salomon, P. C. Schmid, S. Banhatti, S. BrÅNunken, F. Lipparini, J. Gauss, S. Schlemmer, Journal of Molecular Structure, (2020), 1214, 128023. DOI: 10.1016/j.molstruc.2020.128023
  13. High-resolution double resonance action spectroscopy in ion traps: vibrational and rotational fingerprints of CH2NH+2 , C. R. Markus, S. Thorwirth, O. Asvany, and S. Schlemmer, Physical Chemistry Chemical Physics, (2019), 21, 26406–26412. DOI:10.1039/C9CP05487A
  14. Photochemistry of Ozone–Water Ices, P. V. Johnson, C. R. Markus and R. Hodyss, ACS Earth and Space Chemistry (2019). DOI:10.1021/acsearthspacechem.9b00189
  15. Highly accurate experimentally determined energy levels of H+3 , C. R. Markus and B. J. McCall, Journal of Chemical Physics (2019), 150, 214303. DOI:10.1063/1.5099454
  16. Sub-Doppler rovibrational spectroscopy of the ν1 fundamental band of D2H+, C. R. Markus, P. A. Kocheril, and B. J. McCall, Journal of Molecular Spectroscopy (2019), 355, 8–13. DOI: 10.1016/j.jms.2018.11.005
  17. Extended sub-Doppler resolution spectroscopy of the ν3 band of methane, P. A. Kocheril, C. R. Markus, A. M. Esposito, A. W. Schrader, T. S. Dieter, and B. J. McCall, Journal of Quantitative Spectroscopy and Radiative Transfer (2018), 215, 9–12. DOI: 10.1016/j.jqsrt.2018.04.033
  18. Improving cavity-enhanced spectroscopy of molecular ions in the mid-infrared with up-conversion detection and Brewster-plate spoilers, C. R. Markus, A. J. Perry, J. N. Hodges, and B. J. McCall, Optics Express (2017), 25, 3709–3721. DOI: 10.1364/OE.25.003709
  19. Well-Defined Cobalt(I) Dihydrogen Catalyst: Experimental Evidence for CO(I)/CO(III) Redox Process in Olefin Hydrogenation, K. Tokmic, C. R. Markus, L. Zhu, and A.R. Fout, Journal of the American Chemical Society (2016), 138, 11907–11913.DOI:10.1021/jacs.6b07066
  20. HIGH PRECISION SPECTROSCOPY OF OH+, C. R. Markus, J. N. Hodges, A.J. Perry, G. S. Kocheril, H. S. P. Müller, and B. J. McCall, The Astrophysical Journal (2016), 817, 138–142. DOI: 10.3847/0004-637X/817/2/138
  21. High-precision R-branch transition frequencies in the ν2 fundamental band of H+3 , A.J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril, and B. J. McCall, The Journal of Molecular Spectroscopy (2015), 317, 71–73. DOI: 10.1016/j.jms.2015.09.004
  22. Communication: High precision sub-Doppler infrared spectroscopy of the HeH+ ion, A. J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril, and B. J. McCall, Journal of Chemical Physics (2014), 141, 101101-1–101101-5. DOI: 10.1063/1.4895505

Projects

Kinetics and Photochemistry Laboratory