People

Anthony J. Hynes

Anthony J. Hynes

Professor, Department of Atmospheric Sciences

RSMAS/MAC
University of Miami
4600 Rickenbacker Causeway
Miami, FL 33149

SLAB 298

Tel: (305) 421-4173
ahynes@rsmas.miami.edu

Google Scholar Profile

Our research interests center on the development of laser diagnostics for the study of the kinetics and spectroscopy of fundamental processes in atmospheric, plasma and combustion chemistry. Our work in atmospheric chemical kinetics uses laser photolysis coupled with techniques such as laser induced fluorescence (LIF) to detect reactive free radicals. The hyroxyl (OH) radical drives tropospheric chemistry and we use laser induced fluorescence to study its reactions under realistic atmospheric conditions. We can directly observe the formation of weakly bound complexes of OH2 with carbon disulfide and dimethylsulfide. These complexes play a critical role in the atmospheric sulfur cycle. We are also attempting to develop detection schemes for species which cannot be detected by LIF, for example HO2, a reactive intermediate that is important in both atmospheric and combustion chemistry. We have recently developed detection schemes based on Photofragment-LIF for HO2 and Resonance Enhanced Multiphoton Ionization (REMPI) Spectroscopy for O1D.
  • P. Campuzano-Jost, C.D. Clark, H. Maring, D. S. Covert, S. Howell V. Kapustin A. Clarke E. S. Saltzman, A. J. Hynes, Near Real Time Measurement of Sea-Salt Aerosol during the SEAS Campaign: Comparison of Emission based Sodium Detection with an Aerosol atility Technique, Journal of Atmospheric and Oceanic Technology, (to appear in special issue on SEAS campaign).
  • D. Bauer, L. D'Ottone, P. Campuzano-Jost and A. J. Hynes, Gas Phase Elemental Mercury: A Comparison of LIF Detection Techniques and Study of the Kinetics of Reaction with the Hydroxyl Radical, The Journal of Photochemistry and Photobiology, 157, 247-256, 2003.
  • D. Bauer, P. Campuzano-Jost and A. J. Hynes, Rapid, Ultra-sensitive Detection of Gas Phase Elemental Mercury Under Atmospheric Conditions Using Sequential Two-Photon Laser Induced Fluorescence, Journal of Environmental Monitoring, 4, 339 - 343, 2002.
  • Y. Matsumi, F. J. Comes, G. Hancock, A. Hofzumahaus, A. J. Hynes, M. Kawasaki and A. R. Ravishankara, Quantum yields for production of O(1D) in the ultraviolet photolysis of ozone : Recommendation based on evaluation of laboratory data, Journal of Geophysical Research, 107(D3), 10.1029/2001JD000510, 2002.
  • L. D'Ottone, P. Campuzano-Jost, D. Bauer and A. J. Hynes, A Pulsed Laser Photolysis-Pulsed Laser Induced Fluorescence Study of the Kinetics of the Gas-Phase Reaction of OH with NO2, Journal of Physical Chemistry, 105, 10538-10543, 2001.
  • M. B. Williams, P. Campuzano-Jost, D. Bauer and A. J. Hynes, Kinetic and Mechanistic Studies of the OH-Initiated Oxidation of Dimethylsulfide at Low Temperature - A Reevaluation of the Rate Coefficient and Branching Ratio, Chemical Physics Letters, 344, 61-67, 2001.
  • C. D. Clark, P. Campuzano-Jost, D. S. Covert, R. S. Richter, H. Maring, A. J. Hynes, and E. S. Saltzman, Real-Time Measurement of Sodium in Single Aerosol Particles by Flame Emission: Laboratory Characterization, Journal of Aerosol Science, 32, 765-778, 2001.
  • Bauer, D., L. D'Ottone, and A.J. Hynes, O(1D) Quantum Yields from O3 Photolysis in the Near UV Region between 305 and 375 nm, Physical Chemistry Chemical Physics, 2, 1421-1424, 2000.
  • Richter, R. C., V. I. Khamaganov, and A. J. Hynes, Correlated Photofragment Product Distributions in the Photodissociation of NO2 at 212.8 nm. Chemical Physics Letters, 319, 341-348, 2000.
  • Campuzano-Jost, P., Williams, M. B., D'Ottone, L. and Hynes, A. J. Kinetics of the OH-initiated Oxidation of Isoprene, Geophysics Research Letters, 27, 693-696, 2000
  • A. J. Hynes and P. H. Wine; Kinetics and Mechanism of the High Temperature Oxidation of Gaseous Sulfur Compounds; in "Combustion Chemistry, ume 2. W. C. Gardiner ed.; Springer-Verlag, New York, pp. 501-546, 2000.
  • Hynes, A. J., R. C. Richter, A. R. Rosendahl, and C. D. Clark, S2 (a1) Production in the Photolysis of Reduced Sulfides: Production Chemistry, Spectroscopy and Interference Potential in the LIF Detection of OH, Chemical Physics Letters, 295, 25-33, 1998.
  • Richter, R. C., A. R. Rosendahl, A. J., Hynes, and E. P. F. Lee, S2 (a1D) production in the reaction of S1D atoms with COS; Spectroscopy and Dynamics, Journal of Chemical Physics, 109, 8876-8886, 1998.
  • Silvente, E., R. C. Richter, and A. J. Hynes, Kinetics of the Vibrational Deactivation of OH X2 (v = 3,2,1) with Hydrides and Reduced Sulfides, Journal of the Chemical Society, Faraday Transactions, 93, 2821-2830, 1997.
  • Silvente, E., Richter, R. C., Zheng, M., Saltzman, E. S. and Hynes, A. J., Relative Quantum Yields for O1D Production in the Photolysis of Ozone between 301 and 336 nm: Evidence for the Participation of a Spin-Forbidden Channel, Chemical Physics Letters, 264, 309-315, 1997.
  • Hynes, A. J., Richter, R. C, and Nien, C. J., Laser Photofragmention-Laser Induced Fluorescence Detection of the Hydroperoxyl Radical: Photofragment Energy Distributions, Detection Sensitivity and Kinetics, Chemical Physics Letters, 258, 633-638, 1996.
  • Richter, R. C. and Hynes, A. J., Direct Detection of Oxygen 1D2 Atoms by Mass-Resolved, Resonance Enhanced Multiphoton Ionization Spectroscopy, Following Ozone Photolysis at ~276 nm, Journal of Physical Chemistry, 100, 8061-8063, 1996.
  • Hynes, A. J. and Wine, P. H., The Atmospheric Chemistry of Dimethylsulfoxide (DMSO). Kinetics and Mechanism of the OH + DMSO Reaction, Journal of Atmospheric Chemistry, 24, 23-37, 1996.
  • A. J. Hynes; Reaction Mechanisms in Atmospheric Chemistry: Detailed Kinetic and Mechanistic Studies of Hydroxyl Radical Reactions Under Atmospheric Conditions; in Advances in Spectroscopy, ume 24: Spectroscopy in Environmental Science, R. J. H. Clark and R. E. Hester eds., John Wiley and Sons Ltd., 309-348, 1995.
  • Hynes, A. J., Stoker, R. B., Pounds, A. J., McKay, T., Bradshaw, J. D., Nicovich, J. M. and Wine, P. H., A Mechanistic Study of the Reaction of OH with Dimethylsulfide-d6. Direct Observation of Adduct Formation and the Kinetics of the Adduct Reaction with O2, Journal of Physical Chemistry, 99, 16967-16975, 1995.
  • Hynes, A. J., Stickel, R. E., Pounds, A. J., Zhao, Z., McKay, T., Bradshaw, J. D., and Wine, P. H., Mechanistic Studies of the OH-Initiated Oxidation of Dimethylsulfide, Proceedings of the International Symposium on Dimethylsulphide. Oceans, Atmosphere and Climate, G. Restelli and G. Angeletti eds., Kluwer Academic Publishers, 1993.
  • Stickel, R. E., Chin, M., Daykin, E. P., Hynes, A. J., Wine, P. H., and Wallington, T. J.,  Mechanistic Studies of the OH-Initiated Oxidation of CS2 in the Presence of O2., Journal of Physical Chemistry, 97, 13653-13661, 1993.
  • Hynes, A.J., Kenyon, E.A., Pounds, A.J. and Wine, P.H., Temperature Dependent Absorption Cross Sections for Acetone and N-Butanone. Implications for Atmospheric Lifetimes, Spectrochimica Acta, 48a, 1235-1242, 1992.
  • P. H. Wine, A. J. Hynes and J. M. Nicovich, Use of Deuterium Substitution as a Tool for Investigating Mechanisms of Gas Phase Free Radical Reactions, Isotope Effects in Gas Phase Chemical Reaction and Photodissociation Processes, American Chemical Society Symposium Series No. 502, J.A. Kaye, ed., Chapter 7, 94-110, 1992.
  • P. H. Wine, J. M. Nicovich, A. J. Hynes, R. E. Stickel, R. P. Thorn, M. Chin, J. A. Cronkhite, C. J. Shackelford, Z. Zhao, E. P. Daykin, C. A. van Dijk, S. Wang and J. V. Steidl, Laser Flash Photolysis Studies of Atmospheric Free Radical Chemistry Using Optical Diagnostic Techniques, SPIE. 1715, Optical Methods in Atmospheric Chemistry, 1992.
  • Hynes, A.J., Laser-Induced Fluorescence of Silicon and Silicon Monoxide in a Glow Discharge, Characterization of Plasma-Enhanced CVD Processes, Materials Research Society Symposium Proceedings, 165, D.E. Ibbotson, D.W. Hess and G. Lucovsky eds., 45-59, Materials Research Society, Pittsburgh, PA, 1991.
  • Hynes, A.J., Laser-Induced Fluorescence of Silicon Monoxide in a Glow Discharge and an Atmospheric Pressure Flame, Chemical Physics Letters, 181, 237-244, 1991.
  • Hynes, A.J. and Wine, P.H., Kinetics and Mechanism of the Reaction of Hydroxyl Radicals with Acetonitrile Under Atmospheric Conditions, Journal of Physical Chemistry, 95, 1232-1240, 1991.
  • Hynes, A.J. and Wine, P.H., The OH-Initiated Oxidation of Biogenic Sulfur Compounds: Kinetics and Mechanisms Under Atmospheric Conditions," Biogenic Sulfur in the Environment, American Chemical Society Symposium Series No. 393, E.S. Saltzman and W.J. Cooper eds., Chapter 25, 424 - 436, 1989.
  • Hynes, A.J. and Wine, P.H., Time-Resolved Resonance Raman Study of the Spectroscopy and Kinetics of the Cl2- Radical Anion in Aqueous Solution, Journal of Chemical Physics, 89(6), 3565 - 3572, 1988.
  • Hynes, A.J., Wine, P.H. and Nicovich, J.M., Kinetics and Mechanism of the Reaction of OH With CS2 Under Atmospheric Conditions, Journal of Physical Chemistry, 92(13), 3846 - 3852, 1988.
  • Stickel, R.E., Hynes, A.J., Bradshaw, J.D., Chamedies, W.L. and Davis, D.D., Absorption Cross Sections and Kinetic Considerations of the IO Radical as Determined by Laser Flash Photolysis/Laser Absorption Spectroscopy, Journal of Physical Chemistry, 92(7), 1862 - 1864, 1988.
  • Hynes, A.J. and Wine, P.H., Direct Kinetic and Mechanistic Study of the OH + Dimethylsulfide Reaction Under Atmospheric Conditions, The Chemistry of Acid Rain: Sources and Atmospheric Processes, American Chemical Society Symposium Series No. 349, R.W. Johnson and G.E. Gordon eds., Chapter II, 133 - 141, 1987.
  • Hynes, A.J. and Wine, P.H., Kinetics of the OH + CH3SH Reaction Under Atmospheric Conditions, Journal of Physical Chemistry, 91(13), 3672 - 3676, 1987.
  • Hynes, A.J., Wine, P.H. and Nicovich, J.M., Laser Applications to Atmospheric Chemical Kinetics, Proceedings of the International Conference on Lasers '86, R.W. McMillan ed., STS Press, McLean, VA, 669 - 675, 1987.
  • Hynes, A.J., Wine, P.H. and Ravishankara, A.R., Kinetics of the OH + CO Reaction Under Atmospheric Conditions, Journal of Geophysical Research, 91(D11), 11815 - 11820, 1986.
  • Hynes, A.J., Wine, P.H. and Semmes, D.H., Kinetics and Mechanism of OH Reactions With Organic Sulphides, Journal of Physical Chemistry, 90(17), 4148 - 4156, 1986.
  • Wine, P.H., Nicovich, J.M., Hynes, A.J. and Wells, J.R., CH3SH Photolysis at 248 nm. Hydrogen Atom Yield and Rate Constant for the H + CH3SH Reaction, Journal of Physical Chemistry, 90(17), 4033 - 4037, 1986.
  • Hynes, A.J., Schofield, K. and Steinberg, M., Chemistry and Thermodynamics of Sodium in Oxygen-Rich Flames, Journal of Chemical Physics, 80(6) 2585 – 2597, 1984.
  • Hynes, A.J. and Brophy, J.H., Perturbation-Enhanced Quenching of Laser-Excited CS A1(v=0) by Atomic Oxygen, Chemical Physics Letters, 75(1), 52 – 56, 1980.
  • Hynes, A.J. and Brophy, J.H., Laser-Induced Fluorescence Studies of CS d3(v=4), Laser Advances and Applications, 153-156, John Wiley and Sons, 1980. Presented at the 4th National Quantum Electronics Conference, Edinburgh, U.K., 1979.
  • Hynes, A.J. and Brophy, J.H., Laser-Induced Fluorescence Study of Radiative Lifetimes and Quenching Rates in CS A1(v=0), Chemical Physics Letters, 63(1), 93 - 96, 1979.
  • Hynes, A.J. and Brophy, J.H., Laser-Induced Fluorescence Studies of CS A1(v=0), Journal of Photochemistry, 9, no. 2/3, 145 - 147, 1978.
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