The Ennis group is interested in the application of laboratory infrared spectroscopy (including cryogenic thin-film FTIR, matrix isolation, synchrotron far-IR and THz, and aerosol scattering techniques), to characterise crystalline solids.
These investigations are often performed in the context of solid-state astrochemistry, molecular crystals, and supramolecular gas sorption studies where information on UV photochemistry, crystal morphology, and intermolecular interactions within the bulk material to be gathered.
These infrared techniques are coupled with periodic DFT frequency calculations for characterisation of many physicochemical properties of the crystal-phase.
For more detailed information about the Ennis Group research projects and laboratory capabilities please visit our UO Blog: Courtney Ennis University of Otago blog
Professional background
2018 – present, Senior Lecturer, University of Otago 2015 – 2018, ARC DECRA Research Fellow, La Trobe University, Australia 2014 – 2015, Postdoctoral Fellow, Australian Synchrotron/La Trobe University, Australia 2012 – 2013, Postdoctoral Fellow, University College London, United Kingdom 2009 – 2011, Postdoctoral Fellow, University of Hawai'i at Manoa, USA 2005 – 2009, PhD (Physical Chemistry), University of Western Australia, Australia
Publications
Chen, W.-H., Armstrong, E., Dillingham, P. W., Moratti, S. C., Ennis, C., & McGraw, C. M. (2023). Dual-lifetime referencing (t-DLR) optical fiber fluorescent pH sensor for microenvironments. Sensors, 23, 8865. doi: 10.3390/s23218865
Journal - Research Article
McIntyre, S. M., Ennis, C., & Garden, A. L. (2023). A computational investigation into the hydrogenation of NO on water ice surfaces to rationalize the NO:HNO:NOH disparity in space. ACS Earth & Space Chemistry. Advance online publication. doi: 10.1021/acsearthspacechem.2c00391
Journal - Research Article
Francis, T. A., Maynard-Casely, H. E., Cable, M. L., Hodyss, R., & Ennis, C. (2023). Simulation of cocrystal formation in planetary atmospheres: The C6H6:C2H2 cocrystal produced by gas deposition. Journal of Physical Chemistry A. Advance online publication. doi: 10.1021/acs.jpca.2c08791
Journal - Research Article
Boer, S. A., Conte, L., Tarzia, A., Huxley, M. T., Gardiner, M. G., Appadoo, D. R. T., Ennis, C., … White, N. G. (2022). Water sorption controls extreme single-crystal-to-single-crystal molecular reorganization in hydrogen bonded organic frameworks. Chemistry: A European Journal, 28, e202201929. doi: 10.1002/chem.202201929
Journal - Research Article
Ennis, C., Appadoo, D. R. T., Boer, S. A., & White, N. G. (2022). Vibrational mode analysis of hydrogen-bonded organic frameworks (HOFs): Synchrotron infrared studies. Physical Chemistry Chemical Physics, 24, 10784-10797. doi: 10.1039/d2cp00796g
Journal - Research Article
Angeloski, A., Price, J. R., Ennis, C., Smith, K., McDonagh, A. M., Dowd, A., … Bhadbhade, M. (2022). Thermosalience revealed on the atomic scale: Rapid synchrotron techniques uncover molecular motion preceding crystal jumping. Crystal Growth & Design, 22, 1951-1959. doi: 10.1021/acs.cgd.1c01495
Journal - Research Article
Faville, S. C., Harris-Handscomb, K., Harker, O., Mattison, S., Tamorite, H., Bristowe, J., Daly, D., Ege, R., He, H., Jones, J., McCorkindale, A., Mei, K., Monson, A., Moree, L., Perkovic, F., Rickerby, G., Robinson, J., Rudkin, F., Whibley, L., Worthington, R., Ennis, C., de la Harpe, S., Brind, T., Hopkins, A., Winefield, K., … Vernall, A. J. (2022). Open synthesis network research in an undergraduate laboratory: Development of benzoxazole amide derivatives against leishmania parasite. Journal of Chemical Education, 99, 1682-1690. doi: 10.1021/acs.jchemed.1c01213
Journal - Research Article
Maynard-Casely, H. E., Yevstigneyev, N. S., Duyker, S. G., & Ennis, C. (2022). The crystal structure, thermal expansion and far-IR spectrum of propanal (CH3CH2CHO) determined using powder X-ray diffraction, neutron scattering, periodic DFT and synchrotron techniques. Physical Chemistry Chemical Physics, 24, 122-128. doi: 10.1039/d1cp04477j
Journal - Research Article
Ennis, C., Tay, A. C. Y., Falconer, J. L., Lee, S. J., & Meledandri, C. J. (2021). Nanoscale Cu(II) MOFs formed via microemulsion: Vibrational mode characterization performed using a combined FTIR, synchrotron Far-IR, and periodic DFT approach. Journal of Physical Chemistry C, 125, 20426-20438. doi: 10.1021/acs.jpcc.1c06227
Journal - Research Article
Smith, J. N., Ennis, C., & Lucas, N. T. (2021). Rigid, biconical hydrogen-bonded dimers that strongly encapsulate cationic guests in solution and the solid state. Chemical Science, 12, 11858-11863. doi: 10.1039/d1sc01802g
Journal - Research Article
Ennis, C., Cable, M. L., Hodyss, R., & Maynard-Casely, H. E. (2020). Mixed hydrocarbon and cyanide ice compositions for Titan's atmospheric aerosols: A ternary-phase co-crystal predicted by density functional theory. ACS Earth & Space Chemistry, 4, 1195-1200. doi: 10.1021/acsearthspacechem.0c00130
Journal - Research Article
Graf, W. F., Pearson, J. R., Appadoo, D. R. T., Robertson, E. G., & Ennis, C. (2020). Synchrotron far-infrared spectra for the characterisation of molecular crystals of forensic interest: Amphetamine, methamphetamine, MDA, MDMA and substituted methcathinones. Vibrational Spectroscopy, 110, 103115. doi: 10.1016/j.vibspec.2020.103115
Journal - Research Article
Graf, W. F., Pearson, J. R., Appadoo, D. R. T., Robertson, E. G., & Ennis, C. (2020). The prediction of far-infrared spectra for molecular crystals of forensic interest: Phenylethylamine, ephedrine & pseudoephedrine. Forensic Chemistry, 17, 100204. doi: 10.1016/j.forc.2019.100204
Journal - Research Article
Lippitt, E. M. L., Ennis, C., Moratti, S. C., & Hanton, L. R. (2020). Subtle influences of a flexible tecton on an R22(8) carboxyl dimer synthon: From molecular threading to 2D→3D interpenetration. Crystal Growth & Design, 20, 7805-7821. doi: 10.1021/acs.cgd.0c01104
Journal - Research Article
Brand, H. E. A., Gu, Q., Kimpton, J. A., Auchettl, R., & Ennis, C. (2020). Crystal structure of propionitrile (CH3CH2CN) determined using synchrotron powder X-ray diffraction. Journal of Synchrotron Radiation, 27, 212-216. doi: 10.1107/S1600577519015911
Journal - Research Other
Auchettl, R., Ruzi, M., Appadoo, D. R. T., Robertson, E. G., & Ennis, C. (2018). Binary-phase acetonitrile and water aerosols: Infrared studies and theoretical simulation at titan atmosphere conditions. ACS Earth & Space Chemistry, 2(8), 811-820. doi: 10.1021/acsearthspacechem.8b00059
Journal - Research Article
Ennis, C., Auchettl, R., Appadoo, D. R. T., & Robertson, E. G. (2018). The prediction of far-infrared spectra for planetary nitrile ices using periodic density functional theory with comparison to thin film experiments. Physical Chemistry Chemical Physics, 20(36), 23593-23605. doi: 10.1039/c8cp04219e
Journal - Research Article
Ruzi, M., Auchettl, R., Ennis, C., Appadoo, D. R. T., & Robertson, E. G. (2018). Terahertz and mid-infrared spectra of cold formic acid aerosol particles. ACS Earth & Space Chemistry, 2, 1011-1021. doi: 10.1021/acsearthspacechem.8b00085
Journal - Research Article
Ennis, C., Auchettl, R., Appadoo, D. R. T., & Robertson, E. G. (2017). Density functional theory for prediction of far-infrared vibrational frequencies: Molecular crystals of astrophysical interest. Monthly Notices of the Royal Astronomical Society, 471(4), 4265-4274. doi: 10.1093/MNRAS/STX1736
Journal - Research Article
Ennis, C., Auchettl, R., Ruzi, M., & Robertson, E. G. (2017). Infrared characterisation of acetonitrile and propionitrile aerosols under Titan's atmospheric conditions. Physical Chemistry Chemical Physics, 19(4), 2915-2925. doi: 10.1039/c6cp08110j
Journal - Research Article
Ruzi, M., Ennis, C., & Robertson, E. G. (2017). Spectral curve fitting of dielectric constants. AIP Advances, 7(1), 015042. doi: 10.1063/1.4975398
Journal - Research Article
Bennett, C. J., Ennis, C. P., & Kaiser, R. I. (2014). Experimental studies on the formation of D2O and D2O2 by implantation of energetic D+ions into oxygen ices. Astrophysical Journal, 782(2), 63. doi: 10.1088/0004-637X/782/2/63
Journal - Research Article
Bennett, C. J., Ennis, C. P., & Kaiser, R. I. (2014). Implantation of energetic D+ions into carbon dioxide ices and implications for our solar system: Formation of D2O and D2CO3. Astrophysical Journal, 794(1), 57. doi: 10.1088/0004-637X/794/1/57
Journal - Research Article
Kimber, H. J., Ennis, C. P., & Price, S. D. (2014). Single and double addition of oxygen atoms to propyne on surfaces at low temperatures. Faraday Discussions, 168, (pp. 167-184). doi: 10.1039/c3fd00130j
Conference Contribution - Published proceedings: Full paper
Plathe, R., Appadoo, D., & Ennis, C. (2014). New laser applications on the THz/FarIR beamline at the Australian synchrotron. Proceedings of the 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). IEEE. doi: 10.1109/IRMMW-THz.2014.6956415
Conference Contribution - Published proceedings: Full paper
Kim, Y. S., Ennis, C., & Kim, S. J. (2013). Simulating the 3.4-micron feature of Titan's haze. Bulletin of the Korean Chemical Society, 34(3), 759-762. doi: 10.5012/bkcs.2013.34.3.759
Journal - Research Article
Ennis, C., & Kaiser, R. I. (2012). On the formation of ozone in solar system oxygen ices exposed to heavy ions. Astrophysical Journal, 745(2), 103. doi: 10.1088/0004-637X/745/2/103
Journal - Research Article
Ennis, C. P., Bennett, C. J., & Kaiser, R. I. (2011). On the formation of ozone in oxygen-rich solar system ices via ionizing radiation. Physical Chemistry Chemical Physics, 13(20), 9469-9482. doi: 10.1039/c1cp20434c
Journal - Research Article
Ennis, C., Bennett, C. J., Jones, B. M., & Kaiser, R. I. (2011). Formation of D2-water and D2-carbonic acid in oxygen-rich solar system ices via D+2 irradiation. Astrophysical Journal, 733(2), 79. doi: 10.1088/0004-637X/733/2/79
Journal - Research Article
Ennis, C., Yuan, H., Sibener, S. J., & Kaiser, R. I. (2011). On the chemical processing of hydrocarbon surfaces by fast oxygen ions. Physical Chemistry Chemical Physics, 13(39), 17870-17884. doi: 10.1039/c1cp21800j
Journal - Research Article
Ennis, C. P., & Kaiser, R. I. (2010). Mechanistical studies on the electron-induced degradation of polymers: Polyethylene, polytetrafluoroethylene, and polystyrene. Physical Chemistry Chemical Physics, 12(45), 14884-14901. doi: 10.1039/c0cp00493f
Journal - Research Article
Ennis, C. P., & Kaiser, R. I. (2010). Mechanistical studies on the electron-induced degradation of polymethylmethacrylate and Kapton. Physical Chemistry Chemical Physics, 12(45), 14902-14915. doi: 10.1039/c0cp01130d
Journal - Research Article
Kaiser, R. I., Maksyutenko, P., Ennis, C., Zhang, F., Gu, X., Krishtal, S. P., … Ahmed, M. (2010). Untangling the chemical evolution of Titan's atmosphere and surface: From homogeneous to heterogeneous chemistry. Faraday Discussions, 147, (pp. 429-478). doi: 10.1039/c003599h
Conference Contribution - Published proceedings: Full paper
Ennis, C., Lane, J. R., Kjaergaard, H. G., & McKinley, A. J. (2009). Identification of the water amidogen radical complex [Communication]. Journal of the American Chemical Society, 131(4), 1358-1359. doi: 10.1021/ja808109m
Journal - Research Other
Quickenden, T. I., Ennis, C. P., & Creamer, J. I. (2004). The forensic use of luminol chemiluminescence to detect traces of blood inside motor vehicles. Luminescence, 19(5), 271-277. doi: 10.1002/bio.780
Journal - Research Article