Ph.D.: Yale University, 1974 Postdoctoral Fellow: University of Colorado and JILA, 1975-76 Awards:John Simon Guggenheim Fellow 1999-2000Fellow of the Alfred P. Sloan Foundation 1979-1981Wolfgang Prize, 1975NIH Predoctoral Fellowship 1968-1972USPHS Trainee 1965-1967

Aerosols & Clouds Physical Renewable Energy Physical Organic Physical Organic Chemistry

Since 1999 Ellison has become interested in the chemistry and spectroscopy of organic aerosols. To understand the fundamental steps in the "atmospheric processing" of organic aerosols, he studies the oxidation of organic radicals and hydrocarbon films in a high-vacuum surface chamber. Non-linear laser spectroscopy (SHG and SFG) is being used to monitor the dynamics of surface-bound organic. The mechanism of oxidation of organic aerosols is studied in a flow tube reactor and an aerosol mass spectrometer.

G. Barney Ellison, John M. Herbert, Anne B. McCoy, John F. Stanton and Peter G. Szalay "Unimolecular Rearrangement of trans-FONO to FNO2. A Possible Model System for Atmospheric Nitrate Formation", J. Phys. Chem. A , 108, 7639-7642 (2004).

Xu Zhang, Veronica M. Bierbaum, G. Barney Ellison, and Shuji Kato, "Gas-phase reactions of organic radicals and diradicals with ions", J. Chem. Phys., 120(8), 3531-3534 (2004)

Xu Zhang, Shuji Kato, Veronica M. Bierbaum, Mark R. Nimlos, and G. Barney Ellison, "Use of a Flowing Afterglow SIFT Apparatus To Study the Reactions of Ions with Organic Radicals", J. Phys. Chem. A, 108, 9733-9741 (2004).

Stephen J. Blanksby, Veronica M. Bierbaum, G. Barney Ellison, and Shuji Kato, "Fragmentations of Deprotonated Alkyl Hydroperoxides (ROO-) Upon Collisional Activation: A Combined Experimental and Computational Study", Australian J. Chemistry,

X. Zhang, A. V. Friderichsen, J. T. McKinnon, T. G. Lindeman, D. E. David, D. C. Dayton, S. Nandi, G. B. Ellison, and M. R. Nimlos, "An Intense, Thermal Source of Organic Radicals for Matrix-Isolation Spectroscopy," Review of Sci. Instruments, 74(6), 3077-3086 (2003 ).

Stephen J. Blanksby and G. Barney Ellison, "Bond Dissociation Energies of Organic Molecules," Acct. Chem. Res., 36(4), 255-266 (2003 ).

T. M. Ramond, S. J. Blanksby, S. Kato, V. M. Bierbaum, G. E. Davico, R. L. Schwartz, W. C. Lineberger and G. B. Ellison, "The Heat of Formation of the Hydroperoxyl Radical HOO via Negative Ions", J. Phys. Chem. A, 106, 9641-9647 (2002).

S. J. Blanksby, S. Kato, V. M. Bierbaum, G. B. Ellison, "Ion Induced Fragmentation of Alkylhydroperoxides," J. Am. Chem. Soc. 2002, 124, 3196-3197 (2002).

M. R. Nimlos, G. E. Davico, C. M. Geise, P. G. Wenthold, W. C. Lineberger, S. J. Blanksby, C. M. Hadad, G. A. Petersson, G. B. Ellison, "Photoelectron spectroscopy of HCCN- and HCNC- reveals the quasilinear triplet carbenes, HCCN and HCNC," J. Chem. Phys., 117, 4323-4339 (2002).

S. Nandi, S. R. Blanksby, X. Zhang, M. R. Nimlos, D. R. Dayton and G. B. Ellison, "Polarized Infrared Absorption Spectra of Matrix-Isolated Methylperoxyl Radicals, CH3OO2-", J. Phys. Chem. A, 106, 7547-7556 (2002).

Jon C. Rienstra-Kiracofe, G. S. Tschumper, Henry F. Schaefer III, Sreela Nandi and G. Barney Ellison, "Atomic and Molecular Electron Affinities: Photoelectron Experiments and Theoretical Computations," Chem. Revs., 102, 231-282 (2002).

S. Nandi, P. A. Arnold, B. K. Carpenter, M. R. Nimlos, D. C. Dayton and G. B. Ellison, "Polarized Infrared Absorption Spectrum of Matrix-Isolated Allyl Radicals", J. Phys. Chem. A, 105, 7514-7524 (2001).

D. Syomin, J. Kim, B. E. Koel and G. B. Ellison, "Identification of Adsorbed Phenyl (C5H5) Groups on Metal Surfaces: Electron-induced Dissociation of Benzene on Au(111)", J. Phys. Chem. B, 105, 8387-8394 (2001).

S. J. Blanksby, T. M. Ramond, G. E. Davico, M. R. Nimlos, S. Kato, V. M. Bierbaum, W. C. Lineberger, G. B. Ellison and M. Okumura, "Negative Ion Photoelectron Spectroscopy, Gas Phase Acidity, and Thermochemistry of the Peroxyl Radicals CH3OO and CH3CH2OO", J. Am. Chem. Soc.,123, 9585-9596 (2001).

A. V. Friderichsen, J. G. Radziszewski, M. R. Nimlos, P. R. Winter, D. C. Dayton, D. E. David and G. B. Ellison, "The Infrared Spectrum of the Matrix-Isolated Phenyl Radical", J. Am. Chem. Soc., 123, 1977-1988 (2001).

A. V. Friderichsen, E-J. Shin, R. J. Evans, M. R. Nimlos, D. C. Dayton, and G. B. Ellison, Fuel, 80, 1747-1755 (2001).

C. M. Dobson, G. B. Ellison, A. F. Tuck and V. Vaida, "Atmospheric aerosols as prebiotic chemical reactors", Proc. Natl. Acad. Sci. USA, 97, 11864-11868 (2000).

Veronica Vaida, Adrian F. Tuck, and G. Barney Ellison, "Optical and Chemical Properties of Atmospheric organic aerosols", Phys. Chem. Earth (C) 25, 195-198 (2000). -

Jonathan C. Rienstra-Kiracofe, G. Barney Ellison, Brian C. Hoffman, and Henry F. Schaefer III, "The Electron Affinities of C3O and C4O," J. Phys. Chem. A 104, 2273-2280 (2000).

Carl R. Kemnitz, G. Barney Ellison, William L. Karney, and Weston Thatcher Borden, "CASSCF and CASPT2 Ab Initio Electronic Structure Calculations Find Singlet Methylnitrene Is an Energy Minimum", J. Am. Chem. Soc. 122, 1098-1101 (2000).

Gregory J. Frost, G. Barney Ellison, and Veronica Vaida, "Organic peroxyl radical photolysis in the near-infrared: Effects on tropospheric chemistry," J. Phys. Chem. A, 103, 10169-10178 (1999).