Projects per year
Personal profile
Research interests
The research in my group uses several different types of lasers (including nanosecond and femtosecond pulsed lasers, and mid infra-red cw lasers) to study chemical reactivity, atmospheric chemistry, methods of trace gas detection, optical properties of aerosol particles, and molecular spectroscopy and photochemistry. We use ultrafast transient absorption spectroscopy to study chemical reaction dynamics in liquids, velocity map imaging to explore quantum-state resolved reactive scattering in the gas phase, and cavity enhanced spectroscopy methods for a variety of applications in atmospheric chemistry and aerosol science. In addition, we use computational methods such as ab initio electronic structure theory and molecular dynamics to aid the interpretation of experimental measurements. I was the lead investigator on the ERC Advanced Grant CAPRI (Chemical and Photochemical Dynamics of Reactions in Solution, 2012-2017) and my group is part of the EPSRC-funded Bristol - Oxford Programme Grant Chemical Applications of Velocity and Spatial Imaging. We also collaborate with Bristol colleagues Prof Mike Ashfold, Prof Jonathan Reid, Prof Dudley Shallcross, Prof Fred Manby and Dr David Glowacki on various of the above research projects.
Further details of my group's research activities can be found at the homepage of the Laser Chemistry, Spectroscopy and Dynamics Group and a full list of my publications is available here.
Our recent studies of reaction dynamics on ultrafast timescales in liquid solutions were published in Science in 2011. The cover picture shows reaction of CN radicals with cyclohexane in solution in dichloromethane. Theoretical insights from this work were published in 2011 in Nature Chemistry and also featured on the cover. A paper on F-atom reactions in solution appeared in Science in 2015.
Professor Orr-Ewing is a supervisor in the EPSRC Centre for Doctoral Training in Chemical Synthesis
Structured keywords and research groupings
- Cabot Institute Environmental Change Research
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Projects
Mapping Pathways in Photocatalytic Cycles using Ultrafast Spectroscopy
1/03/18 → 28/02/21
Project: Research
Kinetic Studies of Reactive Intermediates from the Oxidation of Atmospheric Alkenes
1/04/17 → 30/09/20
Project: Research
Research Output
Direct Observation of Ylide and Enol Intermediates Formed in Competition with Wolff Rearrangement of Photo-Excited Ethyl Diazoacetoacetate
Phelps, R. & Orr-Ewing, A. J., 8 Apr 2020, In : Journal of the American Chemical Society. 142, p. 7836-7844 9 p., 17.Research output: Contribution to journal › Article (Academic Journal)
Effects of ring-strain on the ultrafast photochemistry of cyclic ketones
Kao, M-H., Venkatraman, R. K., Ashfold, M. N. R. & Orr-Ewing, A. J., 13 Jan 2020, In : Chemical Science. 11, p. 1991-2000 10 p.Research output: Contribution to journal › Article (Academic Journal)
Open Access
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Global and regional model simulations of atmospheric ammonia
Khan, M. A. H., Lowe, D., Derwent, R. G., Foulds, A., Chhantyal-Pun, R., McFiggans, G., Orr-Ewing, A. J., Percival, C. J. & Shallcross, D. E., 1 Apr 2020, In : Atmospheric Research. 234, 12 p., 104702.Research output: Contribution to journal › Article (Academic Journal)
Datasets
Ultrafast Dynamics of 8tBAT base pairs
Taylor, V. C. A. (Creator), Grubb, M. (Creator), Murdock, D. (Creator), Orr-Ewing, A. J. (Creator), Oliver, T. (Creator), Coulter, P. (Creator), Marroux, H. (Creator), Ashfold, M. N. R. (Creator), Duchi, M. (Creator), Ingle, R. (Creator), Koyama, D. (Creator), Roettger, K. (Creator) & Roberts, G. (Creator), University of Bristol, 10 Jan 2017
DOI: 10.5523/bris.xyjoxo6lkca412cqoqyipk5i5, http://data.bris.ac.uk/data/dataset/xyjoxo6lkca412cqoqyipk5i5
Dataset
Ultrafast Chemical Dynamics: BrCN photolysis in PFCs
Grubb, M. (Creator), Orr-Ewing, A. J. (Creator), Marroux, H. (Creator), Coulter, P. (Creator) & Ashfold, M. N. R. (Creator), University of Bristol, 12 Jul 2016
DOI: 10.5523/bris.2xxv3rqrmql41m55jnp7n6v89, http://data.bris.ac.uk/data/dataset/2xxv3rqrmql41m55jnp7n6v89
Dataset
Inelastic scattering of NO with methane
Orr-Ewing, A. J. (Creator), Cascarini, F. J. J. (Creator), Robertson, P. (Creator), Wang, X. (Creator) & Ashfold, M. N. R. (Data Manager), University of Bristol, 7 Jul 2019
DOI: 10.5523/bris.2ggbg99gidvbn2ddlzfxk2fcit, http://data.bris.ac.uk/data/dataset/2ggbg99gidvbn2ddlzfxk2fcit
Dataset
Prizes
Fellow of the Royal Society
Orr-Ewing, Andrew J (Recipient), 5 May 2017
Prize: Election to learned society
Activities
GRC Conference on Vibrational Spectroscopy
Andrew J Orr-Ewing (Chair)
2018
Activity: Participating in or organising an event types › Participation in conference
Royal Society (External organisation)
Andrew J Orr-Ewing (Member)
2016 → 2018
Activity: Membership types › Membership or peer review panel or committee
Heather Lewandowski
Andrew J Orr-Ewing (Host)
10 Oct 2015 → 7 Nov 2015
Activity: Hosting a visitor types › Hosting an academic visitor
Thesis
Improving Our Understanding of the Optical Properties of Atmospheric Aerosols
Author: Willoughby, R., 23 Jan 2019Supervisor: Reid, J. (Supervisor) & Orr-Ewing, A. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy (PhD)
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