Dr. Trevor Carey
Born in Cork, Trevor graduated with a Chemistry degree in University College Cork in 2004. He carried out his PhD under the supervision of Prof. John Wenger at The Centre for Research into Atmospheric Chemistry in UCC. Trevor's research focused on the Atmospheric Simulation Chamber Studies of the Ozonolysis of Green Leaf Volatiles. Trevor completed his PhD studies in 2010. Trevor was appointed Technical Officer for the Chemistry Department in 2011. He is responsible for undergraduate Physical Chemistry practicals and many aspects of continuous assessment associated with Physical Chemistry modules.
Trevor is very active in Outreach activities for the School. He is coordinator of the highly successful Spectroscopy in a Suitcase and is heavily involved in the running of the Salters Festival of Chemistry, Magic Shows and Open Days. Trevor is administrator of the Chemistry Website, Chemistry Facebook, Chemistry Twitter and the popular Chemistry App for iOS and Android. He is also Webmaster for Centre for Research into Atmospheric Chemistry (CRAC) research group in UCC.
Trevor is on numerous internal committees, such as: Outreach, Public Relations and Admissions Committee (OPRA), Teaching and Examinations Committee (TAE), Technical, Administration and Support Committee (TASC) and deputy representative on the Departmental Committee.
- 2011 - Present, Senior Technical Officer in Chemistry, University College Cork.
- 2009 - 2011, Research Assistant / Senior Demonstrator, University College Cork.
- 2004 - 2009, PhD Chemistry, University College Cork.
- 2000 - 2004, BSc. Chemistry, University College Cork.
- 1995 - 2000, North Monastery CBS, Cork.
Supervisor: Prof. John Wenger
Green leaf volatiles (GLVs) are a family of oxygenated hydrocarbons produced from the biochemical conversion of linoleic and linolenic acid within plants. The compounds (Z)-3-hexenyl acetate, (Z)-3-hexenol and (Z)-3-hexenal form an important subset of GLVs that are emitted into the atmosphere in large quantities. In order to understand their impact on the atmosphere, information on their atmospheric degradation processes is required.
A series of laboratory studies has been performed on the gas-phase ozonolysis of (Z)-3-hexenyl acetate, (Z)-3-hexenol, (Z)-3-hexenal and the structurally related compound, (Z)-3-hexene. Rate coefficients for the reactions were measured at 295 ± 2 K and atmospheric pressure. The kinetic data allows conclusions to be made on the effect of various functional groups on the reactivity of the GLVs towards ozone. Yields for the primary carbonyl, propanal, and the OH radical were also measured and the contribution of each Criegee intermediate towards the overall OH radical yield was determined. The molecular composition of secondary organic aerosol (SOA) produced from the ozonolysis of the GLVs was investigated by off-line analysis of filter samples. Many low molecular weight products were identified using two dimensional gas chromatography time-of-flight mass spectrometry, while liquid chromatography mass spectrometry proved effective in characterization of short and longer chain oligomers.
The extent of oligomer formation showed a large dependence on the functional group within the GLV molecule; although dimer formation was observed for all of the compounds, higher order oligomers were only produced to a significant extent in the SOA from (Z)-3-hexenol. This is attributed to the high reactivity of its first generation oxidation product, 3-hydroxypropanal, which can hydrate and readily undergo further reactions in the particle phase. The yields of SOA produced from the ozonolysis of (Z)-3-hexenyl acetate and (Z)-3-hexenol were determined under a variety of reaction conditions. The results indicate that the SOA yield increases for higher starting concentrations of GLV, lower relative humidity and in the presence of seed aerosol. SOA formation yields from (Z)-3-hexenol are higher than those from (Z)-3-hexenyl acetate. The results suggest that GLVs are a potentially important global source of SOA.
- McGillen, M. R.; Archibald, A. T.; Carey, T. J.; Leather, K. E.; Shallcross, D. E.; Wenger, J. C.; Percival, C. J. Structure-activity relationship (SAR) for the prediction of gas-phase ozonolysis rate coefficients: an extension towards heteroatomic unsaturated species. Physical Chemistry Chemical Physics,2011, 13 (7), 2842-2849. DOI
- O'Dwyer, M. A.; Carey, T. J.; Healy, R. M.; Wenger, J. C.; Picquet-Varrault, B.; Doussin, J-F. The gas-phase ozonolysis of 1-penten-3-ol, (Z)-2-penten-1-ol and 1-penten-3-one: kinetics, products and secondary organic aerosol formation. Zeitschrift Fur Physikalische Chemie, 2010, 224 (7-8), 1059-1080. DOI
- Hamilton, J. F.; Lewis, A. C.; Carey, T. J.; Wenger, J. C.; Borrás, E.; Muñoz, A. Reactive oxidation products promote secondary organic aerosol formation from green leaf volatiles. Atmospheric Chemistry and Physics, 2009, 9 (11), 3815-3823. DOI
- Hamilton, J. F; Lewis, A. C.; Carey, T. J.; Wenger, J. C. Characterization of polar compounds and oligomers in secondary organic aerosol using chromatography coupled to mass spectrometry. Analytical Chemistry, 2008, 80 (2), 474-480. DOI
- McGillen, M. R.; Carey, T. J.; Archibald, A. T.; Wenger, J. C.; Shallcross, D. E.; Percival, C. J. Structure-activity relationship (SAR) for the gas-phase ozonolysis of aliphatic alkenes and dialkenes. Physical Chemistry Chemical Physics, 2008, 10 (13), 1757-1768. DOI
- Coordinator of the Royal Society of Chemistry outreach activity, Spectroscopy in a Suitcase.
- Administrator of the following UCC Chemistry online outlets:
- Chemistry Website
- Chemistry Facebook
- Chemistry Twitter
- Chemistry App for iOS and Android
- Chemistry Youtube
- Technical Representative for Teaching and Examinations Committee.
- Technical Representative for Technical, Administration and Support (TASC) Committee.
- Technical Representative for semesterisation of practicals in 2nd/3rd year.
- Deputy Representative for Departmental Committee.
- Joint chair of OPRA (Outreach, PR and Admissions) Committee.
- School of Chemistry administrator for Departmental Module DMIS.
- Fully qualified Occupational First Aider.
- Member of the Royal Society of Chemistry (MRSC).
- RSciTech of the Royal Society of Chemistry (Registered Technician).
- CChem (Chartered Chemist) of the Royal Society of Chemistry.
- Webmaster for Centre for Research into Atmospheric Chemistry (CRAC) research group.
- Coordinator of Chemistry Magic Show Video (November 2015).
- Undergraduate Physical Chemistry Practicals for 2nd Years (CM2003, CM2004, CM2007).
- Undergraduate Physical Chemistry Practicals for 3rd Years (CM3016, CM3017).
- Online Assessment (Moodle) for Physical Chemistry modules (CM2003, CM2004, CM4025).
- Coordinator of 3rd Year Physical Chemistry Small Group Tutorials (CM3016, CM3017).
- Coordinator of Environmental Chemistry section for EV2001.
- Chemistry Educational Support Worker for UCC’s Disability Support Service.
T. Carey, A. Kenna, S. Zhou, J. Wenger, M. McGillen, C. Percival. Effect of Functional Group on the Reactivity of Ozone with a Series of Oxygenated Hexene Derivatives. 21st International Symposium on Gas Kinetics, Leuven, Belgium, July 2010.
T. Carey, J. Wenger, J. Hamilton, A. Lewis, E. Borrais i Garcia, A. Munoz. Secondary Organic Aerosol Formation from Green Leaf Volatiles. INTROP Meeting, Portoroz 2009.
T. Carey, S. Zhou, J. Wenger, M.R. McGillen, C.J. Percival. Absolute Rate Coefficients and OH Radical Yields for the Reaction of Ozone with a Series of Oxygenated Hexene Derivatives. International Symposium on Gas Kinetics, Manchester, July 2008.
T. Carey, J. Wenger, J.F. Hamilton, A.C. Lewis. Chemical characterisation of SOA formed from the ozonolysis of (3Z)-hexenyl acetate. International Conference on Biogenic Volatile Organic Compounds: Sources and Fates in a Changing World, Montpellier, France, September 2007.
T. Carey, J. Wenger, J.F. Hamilton, A.C. Lewis. Chemical characterisation of SOA formed from the ozonolysis of (3Z)-hexenyl acetate. Surface Emissions and Prediction of Atmospheric Composition Changes, Ile d’Oléron, France, September 2007.
T. Carey, M. O’Connor, J. Wenger. Simulation Chamber Studies of the Reaction of Ozone with C6 Biogenic Oxygenated VOCs. European Geosciences Union – General Assembly, Vienna, April 2006.