Velocity map imaging of OH radical products from IR activated (CH3)2COO Criegee intermediates

Li, Hongwei; Kidwell, Nathanael M.; Wang, Xiaohong; Bowman, Joel M.; Lester, Marsha I.

doi:10.1063/1.4962361

Title: Velocity map imaging of OH radical products from IR activated (CH₃)₂COO Criegee intermediates

Abstract

The unimolecular dissociation dynamics of the dimethyl-substituted Criegee intermediate (CH₃)₂COO is examined experimentally using velocity map imaging to ascertain the translational and internal energy distributions of the OH and H₂CC(CH₃)O radical products. The energy profile of key features along the reaction coordinate is also evaluated theoretically. Unimolecular decay of (CH₃)₂COO is initiated by vibrational activation in the CH stretch overtone region and the resultant OH X²Π_3/2 (v = 0) products are state-selectively ionized and imaged. Analysis reveals an isotropic spatial distribution, indicative of a 3 ps lower limit for the timescale of dissociation, and a broad and unstructured total kinetic energy release distribution. The energy released to products is partitioned principally as internal excitation of the H₂CC(CH₃)O fragments with modest translational excitation of the fragments and a small degree of OH rotational excitation. The total kinetic energy release distribution observed for (CH₃)₂COO is compared with that predicted for statistical partitioning over product quantum states, and contrasted with recent experimental and quasi-classical trajectory results for syn-CH₃CHOO [N. M. Kidwell et al., Nat. Chem. 8, 509 (2016)].

Authors:

^[1];

^[1]; Wang, Xiaohong ^[2];

^[2]; Lester, Marsha I. ^[1]

Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Chemistry
Emory Univ., Atlanta, GA (United States). Dept. of Chemistry

Publication Date:: Mon Sep 12 00:00:00 EDT 2016

Research Org.:: Univ. of Pennsylvania, Philadelphia, PA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1467883

Alternate Identifier(s):: OSTI ID: 1323993

Grant/Contract Number:: FG02-87ER13792; FG02-97ER14782

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Chemical Physics

Additional Journal Information:: Journal Volume: 145; Journal Issue: 10; Journal ID: ISSN 0021-9606

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Li, Hongwei, Kidwell, Nathanael M., Wang, Xiaohong, Bowman, Joel M., and Lester, Marsha I. Velocity map imaging of OH radical products from IR activated (CH3)2COO Criegee intermediates.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4962361.

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                    Li, Hongwei, Kidwell, Nathanael M., Wang, Xiaohong, Bowman, Joel M., & Lester, Marsha I. Velocity map imaging of OH radical products from IR activated (CH3)2COO Criegee intermediates.  United States.  https://doi.org/10.1063/1.4962361

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                    Li, Hongwei, Kidwell, Nathanael M., Wang, Xiaohong, Bowman, Joel M., and Lester, Marsha I. Mon .  
"Velocity map imaging of OH radical products from IR activated (CH3)2COO Criegee intermediates".  United States.  https://doi.org/10.1063/1.4962361.  https://www.osti.gov/servlets/purl/1467883.

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@article{osti_1467883,

  title        = {Velocity map imaging of OH radical products from IR activated (CH3)2COO Criegee intermediates},

  author       = {Li, Hongwei and Kidwell, Nathanael M. and Wang, Xiaohong and Bowman, Joel M. and Lester, Marsha I.},

  abstractNote = {The unimolecular dissociation dynamics of the dimethyl-substituted Criegee intermediate (CH3)2COO is examined experimentally using velocity map imaging to ascertain the translational and internal energy distributions of the OH and H2CC(CH3)O radical products. The energy profile of key features along the reaction coordinate is also evaluated theoretically. Unimolecular decay of (CH3)2COO is initiated by vibrational activation in the CH stretch overtone region and the resultant OH X2Π3/2 (v = 0) products are state-selectively ionized and imaged. Analysis reveals an isotropic spatial distribution, indicative of a 3 ps lower limit for the timescale of dissociation, and a broad and unstructured total kinetic energy release distribution. The energy released to products is partitioned principally as internal excitation of the H2CC(CH3)O fragments with modest translational excitation of the fragments and a small degree of OH rotational excitation. The total kinetic energy release distribution observed for (CH3)2COO is compared with that predicted for statistical partitioning over product quantum states, and contrasted with recent experimental and quasi-classical trajectory results for syn-CH3CHOO [N. M. Kidwell et al., Nat. Chem. 8, 509 (2016)].},

  doi          = {10.1063/1.4962361},

  journal      = {Journal of Chemical Physics},

  number       = 10,

  volume       = 145,

  place        = {United States},

  year         = {Mon Sep 12 00:00:00 EDT 2016},

  month        = {Mon Sep 12 00:00:00 EDT 2016}

}

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Works referenced in this record:

The reactions of ozone with alkenes: An important source of HO _x in the boundary layer
journal, December 1996

Paulson, Suzanne E.; Orlando, John J.
Geophysical Research Letters, Vol. 23, Issue 25
DOI: 10.1029/96GL03477

The reaction of Criegee intermediates with NO, RO2, and SO2, and their fate in the atmosphere
journal, January 2012

Vereecken, L.; Harder, H.; Novelli, A.
Physical Chemistry Chemical Physics, Vol. 14, Issue 42
DOI: 10.1039/c2cp42300f

Barrier to Methyl Internal Rotation of 1-Methylvinoxy Radical in the X̃( ² A‘ ‘) and B̃( ² A‘ ‘) States: Experiment and Theory ^†
journal, November 2000

Williams, Sarah; Harding, Lawrence B.; Stanton, John F.
The Journal of Physical Chemistry A, Vol. 104, Issue 45
DOI: 10.1021/jp001009q

UV Spectroscopic Characterization of Dimethyl- and Ethyl-Substituted Carbonyl Oxides
journal, March 2014

Liu, Fang; Beames, Joseph M.; Green, Amy M.
The Journal of Physical Chemistry A, Vol. 118, Issue 12
DOI: 10.1021/jp412726z

Communication: Ultraviolet photodissociation dynamics of the simplest Criegee intermediate CH ₂ OO
journal, October 2013

Lehman, Julia H.; Li, Hongwei; Beames, Joseph M.
The Journal of Chemical Physics, Vol. 139, Issue 14
DOI: 10.1063/1.4824655

UV Photodissociation Dynamics of the CH ₃ CHOO Criegee Intermediate: Action Spectroscopy and Velocity Map Imaging of O-Atom Products
journal, July 2015

Li, Hongwei; Fang, Yi; Kidwell, Nathanael M.
The Journal of Physical Chemistry A, Vol. 119, Issue 30
DOI: 10.1021/acs.jpca.5b05352

Unimolecular dissociation dynamics of vibrationally activated CH3CHOO Criegee intermediates to OH radical products
journal, April 2016

Kidwell, Nathanael M.; Li, Hongwei; Wang, Xiaohong
Nature Chemistry, Vol. 8, Issue 5
DOI: 10.1038/nchem.2488

2,3-Dimethyl-2-butene (TME) Ozonolysis: Pressure Dependence of Stabilized Criegee Intermediates and Evidence of Stabilized Vinyl Hydroperoxides
journal, January 2011

Drozd, Greg T.; Kroll, Jesse; Donahue, Neil M.
The Journal of Physical Chemistry A, Vol. 115, Issue 2
DOI: 10.1021/jp108773d

Production of OH radicals from the reactions of C4–C6 internal alkenes and styrenes with ozone in the gas phase
journal, January 2002

Orzechowska, Grazyna E.; Paulson, Suzanne E.
Atmospheric Environment, Vol. 36, Issue 3
DOI: 10.1016/S1352-2310(01)00445-9

The dynamics of formation of HCl products from the reaction of Cl atoms with methanol, ethanol, and dimethyl ether
journal, September 2002

Rudić, Svemir; Murray, Craig; Ascenzi, Daniela
The Journal of Chemical Physics, Vol. 117, Issue 12
DOI: 10.1063/1.1502646

Stabilization of the Simplest Criegee Intermediate from the Reaction between Ozone and Ethylene: A High-Level Quantum Chemical and Kinetic Analysis of Ozonolysis
journal, May 2015

Nguyen, Thanh Lam; Lee, Hyunwoo; Matthews, Devin A.
The Journal of Physical Chemistry A, Vol. 119, Issue 22
DOI: 10.1021/acs.jpca.5b02088

Perspective: Spectroscopy and kinetics of small gaseous Criegee intermediates
journal, July 2015

Lee, Yuan-Pern
The Journal of Chemical Physics, Vol. 143, Issue 2
DOI: 10.1063/1.4923165

Adventures in ozoneland: down the rabbit-hole
journal, January 2011

Donahue, Neil M.; Drozd, Greg T.; Epstein, Scott A.
Physical Chemistry Chemical Physics, Vol. 13, Issue 23
DOI: 10.1039/c0cp02564j

Mechanism of Ozonolysis
journal, November 1975

Criegee, Rudolf
Angewandte Chemie International Edition in English, Vol. 14, Issue 11
DOI: 10.1002/anie.197507451

The physical chemistry of Criegee intermediates in the gas phase
journal, July 2015

Osborn, David L.; Taatjes, Craig A.
International Reviews in Physical Chemistry, Vol. 34, Issue 3
DOI: 10.1080/0144235X.2015.1055676

Communication: Spectroscopic characterization of an alkyl substituted Criegee intermediate syn -CH ₃ CHOO through pure rotational transitions
journal, January 2014

Nakajima, Masakazu; Endo, Yasuki
The Journal of Chemical Physics, Vol. 140, Issue 1
DOI: 10.1063/1.4861494

Mechanism of HO _x Formation in the Gas-Phase Ozone-Alkene Reaction. 2. Prompt versus Thermal Dissociation of Carbonyl Oxides to Form OH
journal, May 2001

Kroll, Jesse H.; Sahay, Shailesh R.; Anderson, James G.
The Journal of Physical Chemistry A, Vol. 105, Issue 18
DOI: 10.1021/jp004136v

UV + V UV double-resonance studies of autoionizing Rydberg states of the hydroxyl radical
journal, May 2016

Green, Amy M.; Liu, Fang; Lester, Marsha I.
The Journal of Chemical Physics, Vol. 144, Issue 18
DOI: 10.1063/1.4948640

Two-dimensional charged particle image inversion using a polar basis function expansion
journal, November 2004

Garcia, Gustavo A.; Nahon, Laurent; Powis, Ivan
Review of Scientific Instruments, Vol. 75, Issue 11
DOI: 10.1063/1.1807578

Kinetics of a Criegee intermediate that would survive high humidity and may oxidize atmospheric SO ₂
journal, August 2015

Huang, Hao-Li; Chao, Wen; Lin, Jim Jr-Min
Proceedings of the National Academy of Sciences, Vol. 112, Issue 35
DOI: 10.1073/pnas.1513149112

NO angular distributions in the photodissociation of (NO)2 at 213 nm: Deviations from axial recoil
journal, August 2002

Demyanenko, A. V.; Potter, A. B.; Dribinski, V.
The Journal of Chemical Physics, Vol. 117, Issue 6
DOI: 10.1063/1.1490599

Oxidation of hydrazones with iodine in the presence of base
journal, January 1970

Pross, A.; Sternhell, S.
Australian Journal of Chemistry, Vol. 23, Issue 5
DOI: 10.1071/CH9700989

Unimolecular Decomposition Rate of the Criegee Intermediate (CH ₃ ) ₂ COO Measured Directly with UV Absorption Spectroscopy
journal, February 2016

Smith, Mica C.; Chao, Wen; Takahashi, Kaito
The Journal of Physical Chemistry A, Vol. 120, Issue 27
DOI: 10.1021/acs.jpca.5b12124

Pressure-Dependent Criegee Intermediate Stabilization from Alkene Ozonolysis
journal, April 2016

Hakala, Jani P.; Donahue, Neil M.
The Journal of Physical Chemistry A, Vol. 120, Issue 14
DOI: 10.1021/acs.jpca.6b01538

Communication: A new spectroscopic window on hydroxyl radicals using UV + VUV resonant ionization
journal, June 2011

Beames, Joseph M.; Liu, Fang; Lester, Marsha I.
The Journal of Chemical Physics, Vol. 134, Issue 24
DOI: 10.1063/1.3608061

Theoretical studies of atmospheric reaction mechanisms in the troposphere
journal, January 2012

Vereecken, Luc; Francisco, Joseph S.
Chemical Society Reviews, Vol. 41, Issue 19
DOI: 10.1039/c2cs35070j

Infrared-driven unimolecular reaction of CH3CHOO Criegee intermediates to OH radical products
journal, September 2014

Liu, F.; Beames, J. M.; Petit, A. S.
Science, Vol. 345, Issue 6204
DOI: 10.1126/science.1257158

Direct observation of unimolecular decay of CH ₃ CH ₂ CHOO Criegee intermediates to OH radical products
journal, July 2016

Fang, Yi; Liu, Fang; Klippenstein, Stephen J.
The Journal of Chemical Physics, Vol. 145, Issue 4
DOI: 10.1063/1.4958992

Communication: Real time observation of unimolecular decay of Criegee intermediates to OH radical products
journal, February 2016

Fang, Yi; Liu, Fang; Barber, Victoria P.
The Journal of Chemical Physics, Vol. 144, Issue 6
DOI: 10.1063/1.4941768

Photodissociation Dynamics
book, January 2009

Schinke, Reinhard
Cambridge University Press
DOI: 10.1017/CBO9780511586453

The gas-phase ozonolysis of unsaturated volatile organic compounds in the troposphere
journal, January 2008

Johnson, David; Marston, George
Chemical Society Reviews, Vol. 37, Issue 4
DOI: 10.1039/b704260b

MRCISD Studies of the Dissociation of Vinylhydroperoxide, CH ₂ CHOOH: There Is a Saddle Point
journal, May 2012

Kurtén, Theo; Donahue, Neil M.
The Journal of Physical Chemistry A, Vol. 116, Issue 25
DOI: 10.1021/jp302511a

Direct production of OH radicals upon CH overtone activation of (CH ₃ ) ₂ COO Criegee intermediates
journal, December 2014

Liu, Fang; Beames, Joseph M.; Lester, Marsha I.
The Journal of Chemical Physics, Vol. 141, Issue 23
DOI: 10.1063/1.4903961

1+1′ resonant multiphoton ionisation of OH radicals via the A ² Σ ⁺ state: insights from direct comparison with A-X laser-induced fluorescence detection
journal, September 2013

Beames, Joseph M.; Liu, Fang; Lester, Marsha I.
Molecular Physics, Vol. 112, Issue 7
DOI: 10.1080/00268976.2013.822592

Velocity map imaging of O-atom products from UV photodissociation of the CH2OO Criegee intermediate
journal, June 2015

Li, Hongwei; Fang, Yi; Beames, Joseph M.
The Journal of Chemical Physics, Vol. 142, Issue 21
DOI: 10.1063/1.4921990

Works referencing / citing this record:

Deep tunneling in the unimolecular decay of CH ₃ CHOO Criegee intermediates to OH radical products
journal, December 2016

Fang, Yi; Liu, Fang; Barber, Victoria P.
The Journal of Chemical Physics, Vol. 145, Issue 23
DOI: 10.1063/1.4972015

Tunneling effects in the unimolecular decay of (CH ₃ ) ₂ COO Criegee intermediates to OH radical products
journal, April 2017

Fang, Yi; Barber, Victoria P.; Klippenstein, Stephen J.
The Journal of Chemical Physics, Vol. 146, Issue 13
DOI: 10.1063/1.4979297

Photodissociation Dynamics of Carbon Dioxide Cation via the Vibrationally Mediated Ã ² Π _u,1/2 State: A Time-Sliced Velocity-Mapped Ion Imaging Study
journal, April 2017

Mao, Rui; He, Chao; Chen, Min
Chinese Journal of Chemical Physics, Vol. 30, Issue 2
DOI: 10.1063/1674-0068/30/cjcp1611208

Selective deuteration illuminates the importance of tunneling in the unimolecular decay of Criegee intermediates to hydroxyl radical products
journal, November 2017

Green, Amy M.; Barber, Victoria P.; Fang, Yi
Proceedings of the National Academy of Sciences, Vol. 114, Issue 47
DOI: 10.1073/pnas.1715014114

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Title: Velocity map imaging of OH radical products from IR activated (CH3)2COO Criegee intermediates

Abstract

Citation Formats

The reactions of ozone with alkenes: An important source of HO x in the boundary layer journal, December 1996

The reaction of Criegee intermediates with NO, RO2, and SO2, and their fate in the atmosphere journal, January 2012

Barrier to Methyl Internal Rotation of 1-Methylvinoxy Radical in the X̃( 2 A‘ ‘) and B̃( 2 A‘ ‘) States: Experiment and Theory † journal, November 2000

UV Spectroscopic Characterization of Dimethyl- and Ethyl-Substituted Carbonyl Oxides journal, March 2014

Communication: Ultraviolet photodissociation dynamics of the simplest Criegee intermediate CH 2 OO journal, October 2013

UV Photodissociation Dynamics of the CH 3 CHOO Criegee Intermediate: Action Spectroscopy and Velocity Map Imaging of O-Atom Products journal, July 2015

Unimolecular dissociation dynamics of vibrationally activated CH3CHOO Criegee intermediates to OH radical products journal, April 2016

2,3-Dimethyl-2-butene (TME) Ozonolysis: Pressure Dependence of Stabilized Criegee Intermediates and Evidence of Stabilized Vinyl Hydroperoxides journal, January 2011

Production of OH radicals from the reactions of C4–C6 internal alkenes and styrenes with ozone in the gas phase journal, January 2002

The dynamics of formation of HCl products from the reaction of Cl atoms with methanol, ethanol, and dimethyl ether journal, September 2002

Stabilization of the Simplest Criegee Intermediate from the Reaction between Ozone and Ethylene: A High-Level Quantum Chemical and Kinetic Analysis of Ozonolysis journal, May 2015

Perspective: Spectroscopy and kinetics of small gaseous Criegee intermediates journal, July 2015

Adventures in ozoneland: down the rabbit-hole journal, January 2011

Mechanism of Ozonolysis journal, November 1975

The physical chemistry of Criegee intermediates in the gas phase journal, July 2015

Communication: Spectroscopic characterization of an alkyl substituted Criegee intermediate syn -CH 3 CHOO through pure rotational transitions journal, January 2014

Mechanism of HO x Formation in the Gas-Phase Ozone-Alkene Reaction. 2. Prompt versus Thermal Dissociation of Carbonyl Oxides to Form OH journal, May 2001

UV + V UV double-resonance studies of autoionizing Rydberg states of the hydroxyl radical journal, May 2016

Two-dimensional charged particle image inversion using a polar basis function expansion journal, November 2004

Kinetics of a Criegee intermediate that would survive high humidity and may oxidize atmospheric SO 2 journal, August 2015

NO angular distributions in the photodissociation of (NO)2 at 213 nm: Deviations from axial recoil journal, August 2002

Oxidation of hydrazones with iodine in the presence of base journal, January 1970

Unimolecular Decomposition Rate of the Criegee Intermediate (CH 3 ) 2 COO Measured Directly with UV Absorption Spectroscopy journal, February 2016

Pressure-Dependent Criegee Intermediate Stabilization from Alkene Ozonolysis journal, April 2016

Communication: A new spectroscopic window on hydroxyl radicals using UV + VUV resonant ionization journal, June 2011

Theoretical studies of atmospheric reaction mechanisms in the troposphere journal, January 2012

Infrared-driven unimolecular reaction of CH3CHOO Criegee intermediates to OH radical products journal, September 2014

Direct observation of unimolecular decay of CH 3 CH 2 CHOO Criegee intermediates to OH radical products journal, July 2016

Communication: Real time observation of unimolecular decay of Criegee intermediates to OH radical products journal, February 2016

Photodissociation Dynamics book, January 2009

The gas-phase ozonolysis of unsaturated volatile organic compounds in the troposphere journal, January 2008

MRCISD Studies of the Dissociation of Vinylhydroperoxide, CH 2 CHOOH: There Is a Saddle Point journal, May 2012

Direct production of OH radicals upon CH overtone activation of (CH 3 ) 2 COO Criegee intermediates journal, December 2014

1+1′ resonant multiphoton ionisation of OH radicals via the A 2 Σ + state: insights from direct comparison with A-X laser-induced fluorescence detection journal, September 2013

Velocity map imaging of O-atom products from UV photodissociation of the CH2OO Criegee intermediate journal, June 2015

Deep tunneling in the unimolecular decay of CH 3 CHOO Criegee intermediates to OH radical products journal, December 2016

Tunneling effects in the unimolecular decay of (CH 3 ) 2 COO Criegee intermediates to OH radical products journal, April 2017

Photodissociation Dynamics of Carbon Dioxide Cation via the Vibrationally Mediated Ã 2 Π u,1/2 State: A Time-Sliced Velocity-Mapped Ion Imaging Study journal, April 2017

Selective deuteration illuminates the importance of tunneling in the unimolecular decay of Criegee intermediates to hydroxyl radical products journal, November 2017

Title: Velocity map imaging of OH radical products from IR activated (CH₃)₂COO Criegee intermediates

The reactions of ozone with alkenes: An important source of HO _x in the boundary layer
journal, December 1996

The reaction of Criegee intermediates with NO, RO2, and SO2, and their fate in the atmosphere
journal, January 2012

Barrier to Methyl Internal Rotation of 1-Methylvinoxy Radical in the X̃( ² A‘ ‘) and B̃( ² A‘ ‘) States: Experiment and Theory ^†
journal, November 2000

UV Spectroscopic Characterization of Dimethyl- and Ethyl-Substituted Carbonyl Oxides
journal, March 2014

Communication: Ultraviolet photodissociation dynamics of the simplest Criegee intermediate CH ₂ OO
journal, October 2013

UV Photodissociation Dynamics of the CH ₃ CHOO Criegee Intermediate: Action Spectroscopy and Velocity Map Imaging of O-Atom Products
journal, July 2015

Unimolecular dissociation dynamics of vibrationally activated CH3CHOO Criegee intermediates to OH radical products
journal, April 2016

2,3-Dimethyl-2-butene (TME) Ozonolysis: Pressure Dependence of Stabilized Criegee Intermediates and Evidence of Stabilized Vinyl Hydroperoxides
journal, January 2011

Production of OH radicals from the reactions of C4–C6 internal alkenes and styrenes with ozone in the gas phase
journal, January 2002

The dynamics of formation of HCl products from the reaction of Cl atoms with methanol, ethanol, and dimethyl ether
journal, September 2002

Stabilization of the Simplest Criegee Intermediate from the Reaction between Ozone and Ethylene: A High-Level Quantum Chemical and Kinetic Analysis of Ozonolysis
journal, May 2015

Perspective: Spectroscopy and kinetics of small gaseous Criegee intermediates
journal, July 2015

Adventures in ozoneland: down the rabbit-hole
journal, January 2011

Mechanism of Ozonolysis
journal, November 1975

The physical chemistry of Criegee intermediates in the gas phase
journal, July 2015

Communication: Spectroscopic characterization of an alkyl substituted Criegee intermediate syn -CH ₃ CHOO through pure rotational transitions
journal, January 2014

Mechanism of HO _x Formation in the Gas-Phase Ozone-Alkene Reaction. 2. Prompt versus Thermal Dissociation of Carbonyl Oxides to Form OH
journal, May 2001

UV + V UV double-resonance studies of autoionizing Rydberg states of the hydroxyl radical
journal, May 2016

Two-dimensional charged particle image inversion using a polar basis function expansion
journal, November 2004

Kinetics of a Criegee intermediate that would survive high humidity and may oxidize atmospheric SO ₂
journal, August 2015

NO angular distributions in the photodissociation of (NO)2 at 213 nm: Deviations from axial recoil
journal, August 2002

Oxidation of hydrazones with iodine in the presence of base
journal, January 1970

Unimolecular Decomposition Rate of the Criegee Intermediate (CH ₃ ) ₂ COO Measured Directly with UV Absorption Spectroscopy
journal, February 2016

Pressure-Dependent Criegee Intermediate Stabilization from Alkene Ozonolysis
journal, April 2016

Communication: A new spectroscopic window on hydroxyl radicals using UV + VUV resonant ionization
journal, June 2011

Theoretical studies of atmospheric reaction mechanisms in the troposphere
journal, January 2012

Infrared-driven unimolecular reaction of CH3CHOO Criegee intermediates to OH radical products
journal, September 2014

Direct observation of unimolecular decay of CH ₃ CH ₂ CHOO Criegee intermediates to OH radical products
journal, July 2016

Communication: Real time observation of unimolecular decay of Criegee intermediates to OH radical products
journal, February 2016

Photodissociation Dynamics
book, January 2009

The gas-phase ozonolysis of unsaturated volatile organic compounds in the troposphere
journal, January 2008

MRCISD Studies of the Dissociation of Vinylhydroperoxide, CH ₂ CHOOH: There Is a Saddle Point
journal, May 2012

Direct production of OH radicals upon CH overtone activation of (CH ₃ ) ₂ COO Criegee intermediates
journal, December 2014

1+1′ resonant multiphoton ionisation of OH radicals via the A ² Σ ⁺ state: insights from direct comparison with A-X laser-induced fluorescence detection
journal, September 2013

Velocity map imaging of O-atom products from UV photodissociation of the CH2OO Criegee intermediate
journal, June 2015

Deep tunneling in the unimolecular decay of CH ₃ CHOO Criegee intermediates to OH radical products
journal, December 2016

Tunneling effects in the unimolecular decay of (CH ₃ ) ₂ COO Criegee intermediates to OH radical products
journal, April 2017

Photodissociation Dynamics of Carbon Dioxide Cation via the Vibrationally Mediated Ã ² Π _u,1/2 State: A Time-Sliced Velocity-Mapped Ion Imaging Study
journal, April 2017

Selective deuteration illuminates the importance of tunneling in the unimolecular decay of Criegee intermediates to hydroxyl radical products
journal, November 2017