Publications in Peer-reviewed Journals since 2001

 
 
The microwave spectra and molecular structures of (Z)-1-chloro-3,3,3-trifluoropropene and its gas-phase heterodimer with the argon atom," J. Mol. Spectrosc. 394, 111779 (2023) doi:10.1016/j.jms.2023.111779
 
 
 
 
 
 
The microwave spectra and molecular structures of (E)-1,3,3,3-tetrafluoropropene and its complex with the argon atom," J. Mol. Spectrosc., 374, 111379, (2020). doi: 10.1016/j.jms.2020.111379
 

 
 
 
 
Exploring the Forces Contributing to Noncovalent Bonding by Microwave Spectroscopy and Structural Characterization of Gas-Phase Heterodimers of Protic Acids with Haloethylenes," J. Phys. Chem. A, 123, 10846 (2019). doi: 10.1021/acs.jpca.9b07960, (Open Access, Invited Feature Article)
 
 
The Microwave Spectrum and Molecular Structure of 3,3-Difluoro-1,2-Epoxypropane and Its Complex with the Argon Atom," J. Mol. Spectrosc., 350, 18 (2018). doi:10.1016/j.jms.2018.05.003

, , , and , "Microwave Spectrum and Molecular Structure of the Chiral Tagging Candidate, 3,3,3-Trifluoro-1,2-Epoxypropane and Its Complex with the Argon Atom," J. Phys. Chem. A, 122, 4670 (2018).  doi: 10.1021/acs.jpca.8b02550

Helen O. Leung, Mark D. Marshall, and Nazir D. Khan, "The Microwave Spectrum and Molecular Structure of (Z)-1-Chloro-2-Fluoroethylene Acetylene: Demonstrating the Importance of the Balance between Steric and Electrostatic Interactions in Heterodimer Formation," J. Phys. Chem. A, 121, 5651 (2017).  doi: 10.1021/acs.jpca.7b05101

Christopher T. Dewberry, Jessica L. Mueller, Rebecca B. Mackenzie, Brooke A. Timp, Mark D. Marshall, Helen O. Leung, and Kenneth R. Leopold, "The Effect of ortho-Fluorination on Intermolecular Interactions of Pyridine: Microwave Spectrum and Structure of the CO2 – 2,6-Difluoropyridine Weakly Bound Complex," J. Mol. Struct., 1146,  373 (2017).   doi: 10.1016/j.molstruc.2017.06.015

Helen O. Leung, Mark D. Marshall, and Miles A. Wronkovich, "The microwave spectrum and molecular structure of Ar-2,3,3,3-tetrafluoropropene," Journal of Molecular Spectroscopy337, 80 (2017).  doi: 10.1016/j.jms.2017.04.012

Nathan A. Seifert, Daneil P. Zaleski, Robert Fehnel, Mausumi Goswami, Brooks H. Pate, Kevin K. Lehmann, Helen O. Leung, Mark D. Marshall, and John F. Stanton, "The gas-phase structure of the asymmetric, trans-dinitrogen tetroxide (N2O4), formed by dimerization of nitrogen dioxide (NO2), from rotational spectroscopy and ab initio quantum chemistry," Journal of Chemical Physics, 146, 134305 (2017).  doi: 10.1063/1.4979182

Helen O. Leung and Mark D. Marshall, "Effect of chlorine substitution in modulating the relative importance of two intermolecular interactions: the microwave spectrum and molecular structure of (E)-1- chloro-2-fluoroethylene-HCl," Journal of Physical Chemistry A, 120, 7955 (2016). doi: 10.1021/acs.jpca.6b07739

Helen O. Leung, Mark D. Marshall, and Alex J. Lee, "The microwave spectrum and molecular structure of (E)-1-chloro-2-fluoroethylene-HF: Revealing the balance among electrostatics, sterics, and resonance in intermolecular interactions," Journal of Physical Chemistry A, 120, 7935 (2016). doi: 10.1021/acs.jpca.6b07252

Gary E. Douberly, Paul L. Raston, Tao Liang, and Mark D. Marshall, "Infrared rovibrational spectroscopy of OH–C2H2 in 4He nanodroplets: Parity splitting due to partially quenched electronic angular momentum," Journal of Chemical Physics, 142, 134306 (2015). doi: 10.1063/1.4916394

Helen O. Leung, Mark D. Marshall, Joseph P. Messinger, Gregory S. Knowlton, Kathryn M. Sundheim, and Jasmina Cheung-Lau, "The microwave spectra and molecular structures of 2-chloro-1,1-difluoroethylene and its complex with the argon atom," Journal of Molecular Spectroscopy305, 25 (2014). doi: 10.1016/j.jms.2014.09.011

Helen O. Leung and Mark D. Marshall, "The effect of acid identity on the geometry of intermolecular complexes: The microwave spectrum and molecular structure of vinyl chloride-HF," Journal of Physical Chemistry A, 118, 9783 (2014), doi: 10.1021/jp508278d.

Helen O. Leung, Mark D. Marshall, Jessica L. Mueller, and Brent K. Amberger, "The molecular structure of and interconversion tunneling in the argon-cis-1,2-difluoroethylene complex," Journal of Chemical Physics, 139, 134303 (2013).

Helen O. Leung, Mark D. Marshall, and Fan Feng, "Microwave spectrum and molecular structure of vinyl chloride-acetylene, a side-binding complex," Journal of Physical Chemistry A, 117, 13419 (2013).

Mark D. Marshall, Helen O. Leung, and Catherine E. Calvert, "Molecular Structure of the Argon-(Z)-1-Chloro-2-fluoroethylene Complex from Chirped-pulse and Narrow-band Fourier Transform Microwave Spectroscopy," Journal of Molecular Spectroscopy, 280, 97 (2012).

Helen O. Leung, Mark D. Marshall, Aaron T. Bozzi, Paul M. Cohen, and Mable Lam, "Microwave Spectrum and Molecular Structure of the 1-Chloro-1-fluoroethylene-Hydrogen Fluoride Complex," Journal of Molecular Spectroscopy, 267, 43 (2011).

Mark D. Marshall, Helen O. Leung, Benjamin Q. Scheetz, Jonathan E. Thaler, and John S. Muenter, "A Chirped Pulse Fourier Transform Microwave Study of the Refrigerant Alternative 2,3,3,3-Tetrafluoropropene," Journal of Molecular Spectroscopy, 266, 37 (2011).

Helen O. Leung, Mark D. Marshall, and David D. Grimes, "Rotational Spectroscopy and Molecular Structure of the 1-Chloro-1-fluoroethylene-Acetylene Complex," Journal of Chemical Physics, 134, 034303 (2011).

Helen O. Leung and Mark D. Marshall, "Rotational Spectra of 34S- and 33S-containing Isotopologues of Laser Ablation Generated Tin Monosulfide," Journal of Molecular Spectroscopy 265, 52 (2011).

H. O. Leung, M. D. Marshall, M. R. Ray, and J. T. Kang, "Rotational  Spectroscopy and Molecular Structure of the 1,1,2-Trifluoroethylene-Hydrogen Chloride Compex," Journal of Physical Chemistry A 114, 10975 (2010).

Helen O. Leung, Mark D. Marshall, and Brent K. Amberger, "Fourier Transform Microwave Spectroscopy and Molecular Structure of the trans-1,2-Difluoroethylene-Hydrogen Fluoride Complex," J. Chem. Phys., 131, 204302 (2009).

Helen O. Leung, Mark D. Marshall, Tasha L. Drake, Tadeusz Pudlik, Nazir Savji, and Daniel W. McCune, "Fourier Transform Microwave Spectroscopy and Molecular Structure of the 1,1-Difluoroethylene-Hydrogen Fluoride Complex," J. Chem. Phys., 131, 204301 (2009).

Helen O. Leung, Mark D. Marshall, Andrew L. Vasta, and Norman C. Craig "Microwave Spectra of Eight Isotopic Modifications of 1-chloro-1-fluoroethylene," J. Mol. Spectrosc., 253, 116 (2009).

Carolyn S. Brauer, Galen Sedo, Erin Dahlke, Shenghai Wu, Erik M. Grumstrup, Kenneth R. Leopold, Mark D. Marshall, Helen O. Leung, and Donald G. Truhlar, "Effects of 18O Isotopic Substitution on the Rotational Spectra and Potential Splitting in the OH-H2O Complex: Improved Measurements for 16OH-16OH2 and 18OH-18OH2, New Measurements for the Mixed Isotopic Forms, and Ab Initio Calculations of the 2A' -  2A" Energy Separation," J. Chem. Phys.,  129, 104304 (2008).

Helen O. Leung, Mark D. Marshall, Winn T. Cashion, and Vincent L. Chen, "Rotational Spectroscopy and Molecular Structure of the 1,1,2-Trifluoroethylene-Acetylene Complex," J. Chem. Phys., 128, 064315 (2008).

Helen O. Leung and Mark D. Marshall, "Rotational Spectroscopy and Molecular Structure of 1,1,2-Trifluoroethylene and the 1,1,2-Trifluoroethylene-Hydrogen Fluoride Complex," J. Chem. Phys., 126, 114310 (2007).

Erika L. Derro, Craig Murray, Marsha I. Lester, and Mark D. Marshall, "Photodissociation Dynamics of Methyl Nitrate at 193 nm: Energy Disposal in Methoxy and Nitrogen Dioxide Products," Phys. Chem. Chem. Phys., 9, 262 (2007).

Helen O. Leung and Mark D. Marshall, "Rotational Spectroscopy and Molecular Structure of the 1,1-Difluoroethylene-acetylene Complex," J. Chem. Phys., 125, 154301 (2006).

David E. Hansen, Dengda Tang, Jon A. Sanborn, and Mark D. Marshall, "(Strept)Avidin–Biotin: Two Interrelated Experiments for the Introductory Chemistry Laboratory," J. Chem. Educ., 83, 777 (2006).

Mark D. Marshall and Marsha I. Lester, "Spectroscopic Implications of Partially Quenched Orbital Angular Momentum in the OH-Water complex," J. Phys. Chem. B, 109, 8400 (2005).

Carolyn S. Brauer, Galen Sedo, Erik M. Grumstrup, Kenneth R. Leopold, Mark D. Marshall and Helen O. Leung, "Effects of Partially Quenched Orbital Angular Momentum on the Microwave Spectrum and Magnetic Hyperfine Splitting in the OH-Water complex," Chem. Phys. Lett., 401, 420 (2005).

Mark D. Marshall, James B. Davey, Margaret E. Greenslade, and Marsha I. Lester, "Evidence for Partial Quenching of Orbital Angular Momentum upon Complex Formation in the Infrared Spectrum of OH-Acetylene," J. Chem. Phys., 121, 5845 (2004).

Mark D. Marshall and Marsha I. Lester, "Spectroscopic Implications of the Coupling of Unquenched Angular Momentum to Rotation in OH-Containing Complexes," J. Chem. Phys. 121, 3019 (2004).

James B. Davey, Margaret E. Greenslade, Mark D. Marshall, Marsha I. Lester, and Martyn D. Wheeler, "Infrared Spectrum and Stability of a p-type Hydrogen Bonded Complex between the OH and C2H2 Reactants," J. Chem. Phys. 121, 3009 (2004).

Mark D. Marshall, Bethany V. Pond, and Marsha I. Lester, "Intermolecular Vibrations of the Hydrogen Bonded OH–CO Reactant Complex," J. Chem. Phys. 118, 1196 (2003).

Maria Tsiouris, Ilana B. Pollack, Helen O. Leung, Mark D. Marshall, and Marsha I. Lester, "OD–N2: Infrared Spectroscopy, Potential Anisotropy, and Predissociation Dynamics from IR–UV Double Resonance Studies,"J. Chem. Phys. 116, 913 (2002).

Marsha I. Lester, Bethany V. Pond, Mark D. Marshall, David T. Anderson, Lawrence B. Harding, and Albert F. Wagner, "Mapping the OH + CO --> HOCO Reaction Pathway through Infrared Spectroscopy of the OH–CO Reactant Complex," Faraday Discuss. 118, 373 (2001).

Mark D. Marshall, Bethany V. Pond, Shawn M. Hopman, and Marsha I. Lester, "Intermolecular Bending Levels in an Open-shell Diatom-diatom Complex: Infrared Spectroscopy and Model Calculations of the OH–N2 Complex," J. Chem. Phys. 114, 7001 (2001).

Books Published

Helen O. Leung and Mark D. Marshall, Problems and Solutions to accompany Donald A. McQuarrie's Quantum Chemistry Second Edition (University Science Books, Sausalito, California, 2008).

Mark D. Marshall and Helen O. Leung, Instructors' Manual to accompany Chang's Physical Chemistry for the Biosciences (University Science Books, Sausalito, California, 2005).

Mark D. Marshall and Helen O. Leung, Problems and Solutions to accompany Chang's Physical Chemistry for the Biosciences (University Science Books, Sausalito, California, 2005).

Helen O. Leung and Mark D. Marshall, Problems and Solutions to accompany Chang's Physical Chemistry for the Chemical and Biological Sciences (University Science Books, Sausalito, California, 2000).