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Paul Seakins

Professor of Reaction Kinetics
Member of the Atmospheric and Planetary Chemistry group

Contact details

Room: G25
Tel: +44 (0)113 3436568
Email: P.W.Seakins@leeds.ac.uk

Keywords

Reaction kinetics
Mechanisms of reactions
Atmospheric chemistry
Field studies


Photograph of Paul Seakins

Research interests

Laboratory Studies of Reactions Relevant for Combustion, Atmospheric and Fundamental Chemistry
An understanding of the kinetics of elementary reactions involving small radical species is vital for developing chemical models of complex phenomena such as combustion or atmospheric chemistry. Many important reactions have multiple product channels and a focus of our work has been to quantify branching ratios between products as well as the overall rate coefficients.

A recent high light published in Science (Ref 1) has been in identifying the role of chemical activation in controlling the branching ratio of the atmospherically important OH + C2H2/O2 reaction to yield glyoxal or formic acid. This work exemplifies our approach; we look for reactions which are fundamentally interesting, but also of relevance. Other studies include the atmospheric oxidation of amines important in Carbon Capture and Storage (Ref 2), and studies of reactions involved in dimethyl ether (DME) combustion, relevant for the development of new generations of cleaner vehicle engines. Our work is supported by grants from NERC and EPSRC and we are particularly excited by a new application to apply our knowledge and techniques to reactions important for planetary atmospheres. Much of the work is performed collaboratively with Profs Heard, Plane and Pilling, and where possible, the experimental measurements are supported by theoretical calculations (e.g. Ref 1).

HIRAC: A Highly Instrumented Reactor for Atmospheric Chemistry
HIRAC is a 2200 litre atmospheric chamber equipped with state-of-the-art instruments that allow the detection of stable products (e.g. GC, FTIR), but uniquely for such a chamber also OH and HO2 radicals, key intermediates in atmospheric chemistry. Chambers such as HIRAC help to bridge the gap between laboratory measurements of individual elementary reactions (as mentioned above) and the complexity of the real atmosphere. In the chamber we can control the conditions (e.g. temperature, pressure, light intensity, composition) simplifying the chemistry.

A current area of interest is the chemistry in environments dominated by biogenic emissions (e.g. isoprene), but where anthropogenic pollutants such as NO are low. Field campaigns (including those by Prof Heard) have observed higher than expected OH levels and we need to understand these observations, as OH controls the methane lifetime in turn effecting global warming. We have studied the yield of OH and HO2 from the ozonolysis of isoprene (Ref 3) and are currently looking at OH yields from RO2 + HO2 reactions and have other projects on isoprene chemistry. HIRAC provides useful information to develop the Leeds Master Mechanism, a comprehensive model of the troposphere. The controlled conditions of HIRAC make it an excellent resource to evaluate and calibrate field instrumentation.

We are also interested in urban environments and a new PhD student is building on our field measurements of NOx emissions from a nearby tunnel (Ref 4) to look at ozone forming potentials and OH lifetimes of real exhaust emissions.

Useful links

HIRAC group   
   
   

Publications

Shannon RJ, Robertson SH, Blitz MA, Seakins PW Bimolecular reactions of activated species: An analysis of problematic HC(O)C(O) chemistry Chemical Physics Letters 661 58-64, 2016
DOI:10.1016/j.cplett.2016.08.055
View abstract

Stone D, Whalley LK, Ingham T, Edwards PM, Cryer DR, Brumby CA, Seakins PW, Heard DE Measurement of OH reactivity by laser flash photolysis coupled with laser-induced fluorescence spectroscopy Atmospheric Measurement Techniques 9 2827-2844, 2016
DOI:10.5194/amt-9-2827-2016
View abstract

Reed C, Brumby CA, Crilley LR, Kramer LJ, Bloss WJ, Seakins PW, Lee JD, Carpenter LJ HONO measurement by differential photolysis Atmospheric Measurement Techniques 9 2483-2495, 2016
DOI:10.5194/amt-9-2483-2016
View abstract

Stone D, Blitz M, Ingham T, Onel L, Medeiros DJ, Seakins PW An instrument to measure fast gas phase radical kinetics at high temperatures and pressures Review of Scientific Instruments 87 -, 2016
DOI:10.1063/1.4950906
View abstract

Winiberg FAF, Dillon TJ, Orr SC, Groß CBM, Bejan I, Brumby CA, Evans MJ, Smith SC, Heard DE, Seakins PW Direct measurements of OH and other product yields from the HO2+ CH3C(O)O2reaction Atmospheric Chemistry and Physics 16 4023-4042, 2016
DOI:10.5194/acp-16-4023-2016
View abstract

Howes NUM, Lockhart JPA, Blitz MA, Carr SA, Baeza-Romero MT, Heard DE, Shannon RJ, Seakins PW, Varga T Observation of a new channel, the production of CH3, in the abstraction reaction of OH radicals with acetaldehyde Physical Chemistry Chemical Physics 18 26423-26433, 2016
DOI:10.1039/c6cp03970g
View abstract

Farrugia LN, Bejan I, Smith SC, Medeiros DJ, Seakins PW Revised structure activity parameters derived from new rate coefficient determinations for the reactions of chlorine atoms with a series of seven ketones at 290 K and 1 atm Chemical Physics Letters 640 87-93, 2015
DOI:10.1016/j.cplett.2015.09.055
View abstract

Onel L, Blitz MA, Breen J, Rickard AR, Seakins PW Branching ratios for the reactions of OH with ethanol amines used in carbon capture and the potential impact on carcinogen formation in the emission plume from a carbon capture plant Physical Chemistry Chemical Physics 17 25342-25353, 2015
DOI:10.1039/c5cp04083c
View abstract

Blitz MA, Green NJB, Shannon RJ, Pilling MJ, Seakins PW, Western CM, Robertson SH Reanalysis of rate data for the reaction CH<inf>3</inf> + CH<inf>3</inf>→ C<inf>2</inf>H<inf>6</inf> using revised cross sections and a linearized second-order master equation Journal of Physical Chemistry A 119 7668-7682, 2015
DOI:10.1021/acs.jpca.5b01002
View abstract

Shannon RJ, Tomlin AS, Robertson SH, Blitz MA, Pilling MJ, Seakins PW Global uncertainty propagation and sensitivity analysis in the CH<inf>3</inf>OCH<inf>2</inf> + O<inf>2</inf> system: Combining experiment and theory to constrain key rate coefficients in DME combustion Journal of Physical Chemistry A 119 7430-7438, 2015
DOI:10.1021/acs.jpca.5b00620
View abstract

Bejan I, Duncianu M, Olariu R, Barnes I, Seakins PW, Wiesen P Kinetic Study of the Gas-Phase Reactions of Chlorine Atoms with 2-Chlorophenol, 2-Nitrophenol, and Four Methyl-2-nitrophenol Isomers Journal of Physical Chemistry A 119 4735-4745, 2015
DOI:10.1021/acs.jpca.5b02392
View abstract

Lewis TR, Blitz MA, Heard DE, Seakins PW Direct evidence for a substantive reaction between the Criegee intermediate, CH2OO, and the water vapour dimer Physical Chemistry Chemical Physics 17 4859-4863, 2015
DOI:10.1039/c4cp04750h
View abstract

Winiberg FAF, Smith SC, Bejan I, Brumby CA, Ingham T, Malkin TL, Orr SC, Heard DE, Seakins PW Pressure-dependent calibration of the OH and HO2channels of a FAGE HOxinstrument using the Highly Instrumented Reactor for Atmospheric Chemistry (HIRAC) Atmospheric Measurement Techniques 8 523-540, 2015
DOI:10.5194/amt-8-523-2015
View abstract

Onel L, Dryden M, Blitz MA, Seakins PW Atmospheric Oxidation of Piperazine by OH has a Low Potential to Form Carcinogenic Compounds Environmental Science and Technology Letters 1 367-371, 2014
DOI:10.1021/ez5002159
View abstract

Eskola AJ, Carr SA, Shannon RJ, Wang B, Blitz MA, Pilling MJ, Seakins PW, Robertson SH Analysis of the kinetics and yields of OH radical production from the CH3OCH2 + O2 reaction in the temperature range 195-650 K: an experimental and computational study. J Phys Chem A 118 6773-6788, 2014
DOI:10.1021/jp505422e
View abstract

Sharma RC, Blitz M, Wada R, Seakins PW HCl yield and chemical kinetics study of the reaction of Cl atoms with CH3I at the 298 K temperature using the infra-red tunable diode laser absorption spectroscopy Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy 128 176-182, 2014
DOI:10.1016/j.saa.2014.02.065
View abstract

Shannon RJ, Cossou C, Loison JC, Caubet P, Balucani N, Seakins PW, Wakelam V, Hickson KM The fast C(3P) + CH3OH reaction as an efficient loss process for gas-phase interstellar methanol RSC Advances 4 26342-26353, 2014
DOI:10.1039/c4ra03036b
View abstract

Whalley LK, Blitz MA, Desservettaz M, Seakins PW, Heard DE Reporting the sensitivity of laser-induced fluorescence instruments used for HO2 detection to an interference from RO2 radicals and introducing a novel approach that enables HO2 and certain RO2 types to be selectively measured Atmospheric Measurement Techniques 6 3425-3440, 2013
DOI:10.5194/amt-6-3425-2013
View abstract

Stone D, Blitz M, Daubney L, Ingham T, Seakins P CH2OO Criegee biradical yields following photolysis of CH2I2 in O2. Phys Chem Chem Phys 15 19119-19124, 2013
DOI:10.1039/c3cp52466c
View abstract

Carr SA, Still TJ, Blitz MA, Eskola AJ, Pilling MJ, Seakins PW, Shannon RJ, Wang B, Robertson SH Experimental and theoretical study of the kinetics and mechanism of the reaction of OH radicals with dimethyl ether. J Phys Chem A 117 11142-11154, 2013
DOI:10.1021/jp4070278
View abstract

Onel L, Thonger L, Blitz MA, Seakins PW, Bunkan AJ, Solimannejad M, Nielsen CJ Gas-phase reactions of OH with methyl amines in the presence or absence of molecular oxygen. An experimental and theoretical study. J Phys Chem A 117 10736-10745, 2013
DOI:10.1021/jp406522z
View abstract

Lockhart J, Blitz MA, Heard DE, Seakins PW, Shannon RJ Mechanism of the reaction of OH with alkynes in the presence of oxygen. J Phys Chem A 117 5407-5418, 2013
DOI:10.1021/jp404233b
View abstract

Salter RJ, Blitz MA, Heard DE, Pilling MJ, Seakins PW Pressure and temperature dependent photolysis of glyoxal in the 355-414 nm region: evidence for dissociation from multiple states. Phys Chem Chem Phys 15 6516-6526, 2013
DOI:10.1039/c3cp43596b
View abstract

Salter RJ, Blitz MA, Heard DE, Kovács T, Pilling MJ, Rickard AR, Seakins PW Quantum yields for the photolysis of glyoxal below 350 nm and parameterisations for its photolysis rate in the troposphere. Phys Chem Chem Phys 15 4984-4994, 2013
DOI:10.1039/c3cp43597k
View abstract

Simmons WA, Seakins PW Estimations of primary nitrogen dioxide exhaust emissions from chemiluminescence NOx measurements in a UK road tunnel. Sci Total Environ 438 248-259, 2012
DOI:10.1016/j.scitotenv.2012.08.050
View abstract

Blitz MA, Seakins PW Laboratory studies of photochemistry and gas phase radical reaction kinetics relevant to planetary atmospheres. Chem Soc Rev 41 6318-6347, 2012
DOI:10.1039/c2cs35204d
View abstract

Glowacki DR, Lockhart J, Blitz MA, Klippenstein SJ, Pilling MJ, Robertson SH, Seakins PW Interception of excited vibrational quantum states by O2 in atmospheric association reactions. Science 337 1066-1069, 2012
DOI:10.1126/science.1224106
View abstract

Baeza-Romero MT, Blitz MA, Goddard A, Seakins PW Time-of-flight mass spectrometry for time-resolved measurements: Some developments and applications International Journal of Chemical Kinetics 44 532-545, 2012
DOI:10.1002/kin.20620
View abstract

Blitz MA, Talbi D, Seakins PW, Smith IW Rate constants and branching ratios for the reaction of CH radicals with NH3: a combined experimental and theoretical study. J Phys Chem A 116 5877-5885, 2012
DOI:10.1021/jp209383t
View abstract

Onel L, Blitz MA, Seakins PW Direct determination of the rate coefficient for the reaction of Oh Radicals with monoethanol amine (MEA) from 296 to 510 K Journal of Physical Chemistry Letters 3 853-856, 2012
DOI:10.1021/jz300200c
View abstract

Chaney AM, Cryer DJ, Nicholl EJ, Seakins PW NO and NO2 interconversion downwind of two different line sources in suburban environments ATMOS ENVIRON 45 5863-5871, 2011
DOI:10.1016/j.atmosenv.2011.06.070

Blitz MA, Kappler C, Pilling MJ, Seakins PW (CH2)-C-3 + O-2: Kinetics and Product Channel Branching Ratios ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY&CHEMICAL PHYSICS 225 957-967, 2011
DOI:10.1524/zpch.2011.0138

Carr SA, Blitz MA, Seakins PW Product branching fractions for the reaction of O(P-3) atoms with methanol and ethanol CHEM PHYS LETT 511 207-212, 2011
DOI:10.1016/j.cplett.2011.06.060

Carr SA, Blitz MA, Seakins PW Site-specific rate coefficients for reaction of OH with ethanol from 298 to 900 K. J Phys Chem A 115 3335-3345, 2011
DOI:10.1021/jp200186t
View abstract

Carr SA, Glowacki DR, Liang CH, Baeza-Romero MT, Blitz MA, Pilling MJ, Seakins PW Experimental and modeling studies of the pressure and temperature dependences of the kinetics and the OH yields in the acetyl + O2 reaction. J Phys Chem A 115 1069-1085, 2011
DOI:10.1021/jp1099199
View abstract

Baeza-Romero MT, Blitz MA, Goddard A, Seakins PW Time-of-flight mass spectrometry for time-resolved measurements: Some developments and applications International Journal of Chemical Kinetics -, 2011

Chaney AM, Cryer DJ, Nicholl EJ, Seakins PW NO and NO2 interconversion downwind of two different line sources in suburban environments Atmospheric Environment -, 2011

Seakins PW, Blitz MA Developments in laboratory studies of gas-phase reactions for atmospheric chemistry with applications to isoprene oxidation and carbonyl chemistry. Annu Rev Phys Chem 62 351-373, 2011
DOI:10.1146/annurev-physchem-032210-102538
View abstract

Gannon KL, Blitz MA, Liang CH, Pilling MJ, Seakins PW, Glowacki DR Temperature dependent kinetics (195-798 K) and H atom yields (298-498 K) from reactions of (1)CH(2) with acetylene, ethene, and propene. J Phys Chem A 114 9413-9424, 2010
DOI:10.1021/jp102276j
View abstract

Kovács T, Blitz MA, Seakins PW H-atom yields from the photolysis of acetylene and from the reaction of C2H with H2, C2H2, and C2H4. J Phys Chem A 114 4735-4741, 2010
DOI:10.1021/jp908285t
View abstract

Eskola AJ, Carr SA, Blitz MA, Pilling MJ, Seakins PW Kinetics and yields of OH radical from the CH3OCH2 + O-2 reaction using a new photolytic source CHEM PHYS LETT 487 45-50, 2010
DOI:10.1016/j.cplett.2010.01.025

Gannon KL, Blitz MA, Kovács T, Pilling MJ, Seakins PW State resolved measurements of a (1)CH(2) removal confirm predictions of the gateway model for electronic quenching. J Chem Phys 132 024302-, 2010
DOI:10.1063/1.3263617
View abstract

Malkin TL, Goddard A, Heard DE, Seakins PW Measurements of OH and HO2 yields from the gas phase ozonolysis of isoprene ATMOS CHEM PHYS 10 1441-1459, 2010

Gannon KL, Blitz MA, Liang CH, Pilling MJ, Seakins PW, Glowacki DR, Harvey JN An experimental and theoretical investigation of the competition between chemical reaction and relaxation for the reactions of (CH2)-C-1 with acetylene and ethene: implications for the chemistry of the giant planets, 2010
DOI:10.1039/c004131a

Seakins PW A brief review of the use of environmental chambers for gas phase studies of kinetics, chemical mechanisms and characterisation of field instruments, 2010
DOI:10.1051/epjconf/201009012

Blitz MA, Seakins PW, Smith IW An experimental confirmation of the products of the reaction between CN radicals and NH3. Phys Chem Chem Phys 11 10824-10826, 2009
DOI:10.1039/b917734e
View abstract

Kovács T, Blitz MA, Seakins PW, Pilling MJ H atom formation from benzene and toluene photoexcitation at 248 nm. J Chem Phys 131 204304-, 2009
DOI:10.1063/1.3262701
View abstract

Wada R, Sharma RC, Blitz MA, Seakins PW Studies on the Cl + C2H5I reaction; site specific abstraction reactions and thermodynamics of adduct formation studied by observation of HCL product. Phys Chem Chem Phys 11 10417-10426, 2009
DOI:10.1039/b907793f
View abstract

Salter RJ, Blitz MA, Heard DE, Pilling MJ, Seakins PW New chemical source of the HCO radical following photoexcitation of glyoxal, (HCO)2. J Phys Chem A 113 8278-8285, 2009
DOI:10.1021/jp9030249
View abstract

Gannon KL, Blitz MA, Pilling MJ, Seakins PW, Klippenstein SJ, Harding LB Kinetics and product branching ratios of the reaction of (CH2)-C-1 with H-2 and D-2 J PHYS CHEM A 112 9575-9583, 2008
DOI:10.1021/jp803038s

Carr SA, Baeza-Romero MT, Blitz MA, Price BJS, Seakins PW Ketone photolysis in the presence of oxygen: A useful source of OH for flash photolysis kinetics experiments INT J CHEM KINET 40 504-514, 2008
DOI:10.1002/kin.20330

Glowacki DR, Baeza-Romero MT, Blitz MA, Heard DE, Seakins PW, Pilling MJ PHYS 61-Combined experimental and theoretical study of Methylglyoxal plus OH: Atmospheric implications, 2008

Wang L, Heard DE, Pilling MJ, Seakins PW A Gaussian-3X prediction on the enthalpies of formation of chlorinated Phenols and dibenzo-p-dioxins Journal of Physical Chemistry A 112 1832-1840, 2008

Glowacki DR, Goddard A, Seakins PW Design and performance of a throughput-matched, zero-geometric-loss, modified three objective multipass matrix system for FTIR spectrometry. Appl Opt 46 7872-7883, 2007
View abstract

Glowacki DR, Goddard A, Hemavibool K, Malkin TL, Commane R, Anderson F, Bloss W, Heard DE, Ingham T, Pilling MJ, Seakins PW Design of and initial results from a Highly Instrumented Reactor for Atmospheric Chemistry (HIRAC) Atmospheric Chemistry and Physics 7 5371-5390, 2007

Carr SA, Baeza-Romero MT, Blitz MA, Pilling MJ, Heard DE, Seakins PW OH yields from the CH3CO+O-2 reaction using an internal standard CHEM PHYS LETT 445 108-112, 2007
DOI:10.1016/j.cplett.2007.07.099

Seakins PW, Robertson SH Synergies between experimental and theoretical studies of gas phase reactions PHYS CHEM CHEM PHYS 9 4053-4054, 2007
DOI:10.1039/b710132p

Gannon KL, Glowacki DR, Blitz MA, Hughes KJ, Pilling MJ, Seakins PW H atom yields from the reactions of CN radicals with C2H2, C2H4, C3H6, trans-2-C4H8, and iso-C4H8. J Phys Chem A 111 6679-6692, 2007
DOI:10.1021/jp0689520
View abstract

Mckee KW, Blitz MA, Cleary PA, Glowacki DR, Pilling MJ, Seakins PW, Wang LM Experimental and master equation study of the kinetics of OH+C2H2: Temperature dependence of the limiting high pressure and pressure dependent rate coefficients J PHYS CHEM A 111 4043-4055, 2007
DOI:10.1021/jp067594y

Baeza Romero MT, Glowacki DR, Blitz M, Heard DE, Pilling MJ, Rickard AR, Seakins PW A combined experimental and theoretical study of the reaction between methylglyoxal and OH/OD radical: OH regeneration Physical Chemistry, Chemical Physics: a journal of European Chemical Societies 9 4114-4128, 2007
DOI:10.1039/b702916k
View abstract

Seakins PW Product branching ratios in simple gas phase reactions Annual Reports on the Progress of Chemistry - Section C 103 173-222, 2007
DOI:10.1039/b605650b
View abstract

Glowacki DR, Goddard A, Hemavibool K, Malkin TL, Commane R, Anderson F, Bloss WJ, Heard DE, Ingham T, Pilling MJ, Seakins PW, Bloss WJ Design of and initial results from a highly instrumented reactor for atmospheric chemistry (HIRAC) Atmospheric Chemistry and Physics Discussions 7 10687-10742, 2007
View abstract

Still TJ, Al-Haider S, Seakins PW, Sommariva R, Stanton J, Mills G, Penkett SA Ambient formaldehyde measurements made at a remote marine boundary layer site during the NAMBLEX campaign– a comparison of data from chromatographic and modified Hantzsch techniques Atmospheric Chemistry and Physics 6 2711-2726, 2006

Fleming ZL, Monks PS, Rickard AR, Heard DE, Bloss WJ, Seakins PW, Still TJ, Sommariva R, Pilling MJ, Morgan R, Green TJ, Brough N, Mills GP, Penkett SA, Lewis AC, Lee JD, Saiz-Lopez A, Plane JMC Peroxy radical chemistry and the control of ozone photochemistry at Mace Head, Ireland during the summer of 2002 ATMOS CHEM PHYS 6 2193-2214, 2006

Heard DE, Read KA, Methven J, Al Haider S, Bloss W, Johnson GP, Pilling MJ, Seakins PW, Smith SC, Sommariva R, Stanton J, Still T, Ingham T, Brooks BJ, de Leeuw G, Jackson AV, McQuaid JB, Morgan R, Smith MH, Carpenter LJ, Carslaw N, Hamilton JF, Hopkins JR, Lee JD, Lewis AC, Purvis RM, Wevill DJ, Brough N, Green TJ, Mills GP, Penkett SA, Plane JMC, Saiz-Lopez A, Worton D, Monks PS, Fleming ZL, Rickard AR, Alfarra M, Allan JD, Bower K, Coe H, Cubison M, Flynn M, McFiggans G, Gallagher MW, Norton EG, O'Dowd CD, Shillito J, Topping D, Vaughan G, Williams P, Bitter M, Ball SM, Jones RL, Povey IM, O'Doherty S, Simmonds PG, Allen A, Kinnersley RP, Dall'Osto M, Harrison RM, Donovan RJ, Heal MR, Jennings SG, Noone C, Beddows DCS, Spain G The North Atlantic Marine Boundary Layer Experiment (NAMBLEX). Overview of the Campaign held at Mace Head, Ireland, in Summer 2002 Atmospheric Chemistry and Physics Discussions 6 2241-2272, 2006

Choi N, Pilling MJ, Seakins PW, Wang L Studies of site selective hydrogen atom abstractions by Cl atoms from isobutane and propane by laser flash photolysis/IR diode laser spectroscopy. Phys Chem Chem Phys 8 2172-2178, 2006
DOI:10.1039/b516531h
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Harrison RM, Yin J, Tilling RM, Cai X, Seakins PW, Hopkins JR, Lansley DL, Lewis AC, Hunter MC, Heard DE, Carpenter LJ, Creasy DJ, Lee JD, Pilling MJ, Carslaw N, Emmerson KM, Redington A, Derwent RG, Ryall D, Mills G, Penkett SA Measurement and modelling of air pollution and atmospheric chemistry in the UK West Midlands conurbation: Overview of the PUMA Consortium project SCI TOTAL ENVIRON 360 5-25, 2006
DOI:10.1016/j.scitotenv.2005.08.053

Lee JDL, Lewis AC, Monks PS, Jacob M, Hamilton JF, Hopkins JR, Watson N, Saxton J, Ennis C, Carpenter LJ, Carslaw N, Fleming ZL, Bandy BJ, Oram DE, Penkett SA, Slemr J, Norton E, Rickard AR, Whalley LK, Heard DE, Bloss W, Gravestock T, Smith S, Stanton J, Pilling MJ, Jenkin ME, Bower K, Coe H, Cryer D, Emmerson KM, Gallagher M, Ingham T, Johnson D, Johnson G, McFiggans G, McQuaid JB, Mills G, Seakins PW, Utembe S, Vaughan G Ozone photochemistry and elevated isoprene during the U.K. heat wave of August 2003 Atmospheric Environment 40 7598-7613, 2006

Cleary PA, Romero MTB, Blitz MA, Heard DE, Pilling MJ, Seakins PW, Wang L Determination of the temperature and pressure dependence of the reaction OH+C2H4 from 200-400 K using experimental and master equation analyses PHYS CHEM CHEM PHYS 8 5633-5642, 2006
DOI:10.1039/b612127f

Fleming ZL, Monks PS, Rickard AR, Heard DE, Bloss W, Seakins PW, Sommariva R, Pilling MJ, Morgan R, Green TJ, Brough N, Mills GP, Penkett SA, Lee JDL, Saiz-Lopez A, Plane JMC Peroxy radical chemistry and the control of ozone photochemistry at Mace Head, Ireland, Summer of 2002 Atmospheric Chemistry and Physics Discussions 5 12313-12371, 2005

Baeza Romero MT, Blitz M, Heard DE, Pilling MJ, Price BS, Seakins PW OH formation from C2H5CO+O2reaction: An experimental marker for the propionyl radical Chemical Physics Letters 408 232-236, 2005
DOI:10.1016/j.cplett.2005.04.018

Blitz MA, Choi N, Kovacs T, Seakins PW, Pilling MJ The effect of temperature on collision induced intersystem crossing in the reaction of (CH2)-C-1 with H-2 PROCEEDINGS OF THE COMBUSTION INSTITUTE 30 927-933, 2005
DOI:10.1016/j.proci.2004.08.073

Hopkins JR, Lewis AC, Seakins PW Analysis and applications of measurements of source dominated hydrocarbon concentrations from the PUMA campaigns in June/July 1999 and January/February 2000 at an urban background site in Birmingham, UK ATMOS ENVIRON 39 535-548, 2005
DOI:10.1016/j.atmosenv.2004.09.034

Romero MTB, Blitz MA, Heard DE, Pilling MJ, Price B, Seakins PW, Wang LM Photolysis of methylethyl, diethyl and methylvinyl ketones and their role in the atmospheric HOx budget FARADAY DISCUSS 130 73-88, 2005
DOI:10.1039/b419160a

Heard DE, Carpenter LJ, Creasey DJ, Hopkins JR, Lee JDL, Lewis AC, Pilling MJ, Seakins PW, Carslaw N, Emmerson KM High levels of the hydroxyl radical in the winter urban troposphere Geophysical Research Letters 31 pp.L18112-, 2004
DOI:10.1029/2004GL020544

Seakins PW Laboratory studies of the initial steps in VOC oxidation, 2004

Seakins PW, Orlando JJ, Tyndall GS Rate coefficients and production of vibrationally excited HCl from the reactions of chlorine atoms with methanol, ethanol, acetaldehyde and formaldehyde PHYS CHEM CHEM PHYS 6 2224-2229, 2004
DOI:10.1039/b402167c

Choi N, Blitz MA, McKee K, Pilling MJ, Seakins PW H atom branching ratios from the reactions of CN radicals with C2H2 and C2H4 CHEM PHYS LETT 384 68-72, 2004
DOI:10.1016/j.cplett.2003.11.100

Bell MC, Tomlin AS, Seakins PW, Kale GM, Watson A, Andrews GE, Routledge MN, Tate JE, Goodman PS LANTERN - Leeds health Air pollution, Noise, Traffic and Emissions Research Network, 2004

Heard DE, Carpenter LJ, Creasey DJ, Hopkins JR, Lee JD, Lewis AC, Pilling MJ, Seakins PW, Carslaw N, Emmerson K High levels of the hydroxyl radical in the winter urban troposphere Geophysical Research Letters 31 pp.L18112-, 2004
DOI:10.1029/2004GL020544

McKee K, Blitz MA, Hughes KJ, Pilling MJ, Qian HB, Taylor A, Seakins PW H atom branching ratios from the reactions of CH with C2H2, C2H4, C2H6, and neo-C5H12 at room temperature and 25 torr J PHYS CHEM A 107 5710-5716, 2003
DOI:10.1021/jp021613w

Hopkins JR, Still T, Al Haider S, Fisher IR, Lewis AC, Seakins PW A simplified apparatus for formaldehyde detection via GC--pHID Atmospheric Environment 37 2557-2565, 2003
DOI:10.1016/S1352-2310(03)00178-X

Hopkins JR, Barnett CJ, Lewis AC, Seakins PW Measurements of C-6-C-8 hydrocarbons at a UK rural site during January 1999. Site evaluation and correlations between species Environmental Monitoring and Assessment 5 14-20, 2003

Blitz M, McKee KW, Pilling MJ, Seakins PW Evans function analysis of the stability induced intersystem crossing in the reaction of of1CH2with O2and a determination of the H atom yields from3CH2+ O2, using time-resolved ....... Chemical Physics Letters 372 295-299, 2003
DOI:10.1016/S0009-2614(03)00393-2

McKee KW, Blitz MA, Pilling MJ, Qian HB, Taylor A, Seakins PW H atom yields in the reaction of Ch with etahyne, ethene, ethane and 2,3 dimethylpropane International Symposium on Combustion Abstracts of Works-in-Progress Posters 229-, 2002
View abstract

Hopkins JR, Jones ID, Lewis AC, McQuaid JB, Seakins PW Non-methane hydrocarbons in the Arctic boundary layer ATMOS ENVIRON 36 3217-3229, 2002

Seakins PW, Lansley DL, Hodgson A, Huntley N, Pope F New Directions: Mobile laboratory reveals new issues in urban air quality ATMOS ENVIRON 36 1247-1248, 2002

Lansley D, Seakins PW Chemistry and dispersion of pollutants from a rural motorway: Measurements and modelling. 2nd Conference on Air Pollution Modelling and Simulation (APMS 2001), Paris In Air Pollution Modelling&Simulation Proceedings , 2002

Harrison D, Hunter MC, Lewis AC, Seakins PW, Nunes TV, Pio CA Isoprene and monoterpene emission from the coniferous species Abies Borisii-regis - implications for regional air chemistry in Greece ATMOS ENVIRON 35 4687-4698, 2001

Carslaw N, Creasey DJ, Harrison D, Heard DE, Hunter MC, Jacobs PJ, Jenkin ME, Lee JD, Lewis AC, Pilling MJ, Saunders SM, Seakins PW OH and HO2 radical chemistry in a forested region of north-western Greece ATMOS ENVIRON 35 4725-4737, 2001

Harrison D, Hunter MC, Lewis AC, Seakins PW, Bonsang B, Gros V, Kanakidou M, Touaty M, Kavouras I, Mihalopoulos N, Stephanou E, Alves C, Nunes T, Pio C Ambient isoprene and monoterpene concentrations in a Greek fir (Abies Borisii-regis) forest. Reconciliation with emissions measurements and effects on measured OH concentrations ATMOS ENVIRON 35 4699-4711, 2001

Blitz M, Pilling MJ, Seakins PW Collision induced intersystem crossing in methylene on reactive surfaces: application of a new technique to CH2(a 1A1) +H2 Physical Chemistry, Chemical Physics: a journal of European Chemical Societies 3 2241-2244, 2001
DOI:10.1039/b010249k

Poisson N, Kanakidou M, Bonsang B, Behmann T, Burrows JP, Fischer H, Golz C, Harder H, Lewis AC, Moortgat GK, Nunes TV, Pio CA, Platt U, Sauer F, Schuster G, Seakins PW, Senzig J, Seuwen R, Trapp D, Volz-Thomas A, Zenker T, Zitzelberger R The impact of natural non-methane hydrocarbon on the free radical and ozone budgets above a eucalyptus forest Chemosphere : Global Change Science 3 353-366, 2001

Qian H, Turton D, Seakins PW, Pilling MJ A laser flash photolysis/IR diode laser absorption study of the reaction of chlorine atoms with selected alkanes International Journal of Chemical Kinetics 34 86-94, 2001

Blitz M, McKee K, Qian H, Seakins PW H atom yields from the CH + O2reaction Faraday Discussions 119 pp.121-, 2001
DOI:10.1039/b107967k

Trapp D, Cooke KM, Fischer H, Bonsang B, Zitzelsberger RU, Seuwen R, Schiller C, Zenker T, Parchatka U, Nunes TV, Pio CA, Lewis AC, Seakins PW, Pilling MJ Isoprene and its degradation products methyl vinyl ketone, methacrolein and formaldehyde in a eucalyptus forest during the FIELDVOC'94 campaign in Portugal Chemosphere 3 295-307, 2001

Harrison D, Seakins PW, Lewis AC Simultaneous monitoring of methane and speciated non methane hydrocarbon atmospheric concentrations using Peltier effect sub-ambient pre concentration and gas chromatiograph Environmental Monitoring and Assessment 2 pp.59-, 2000

Qian H, Turton D, Seakins PW, Pilling MJ Dynamic frequency stabilization of infrared diode laser for kinetic studies Chemical Physics Letters 322 57-64, 2000

Blitz M, Pilling MJ, Robertson SH, Seakins PW Direct studies on the decomposition of thetert-butoxy radical and its reaction with NO Physical Chemistry, Chemical Physics: a journal of European Chemical Societies 1 73-80, 1999

Blitz M, Pesa M, Pilling MJ, Seakins PW The reaction of CH with water isotopomers Journal of Physical Chemistry B 103 pp.5699-, 1999

Hunter M, Bartle KD, Seakins PW, Lewis AC Direct measurement of atmospheric formaldehyde using gas chromatography-pulsed discharge ionisation detection Analytical Communications 36 101-104, 1999

Hunter M, Bartle KD, Lewis AC, McQuaid JB, Myers P, Van Tilburg C, Seakins PW The use of the helium ionization detector for gas chromatographic monitoring of trace atmospheric components HRC - Journal of High Resolution Chromatography 21 pp.75-, 1998

Lewis AC, Bartle KD, Heard DE, McQuaid JB, Pilling MJ, Seakins PW In situ,gas chromatographic measurements of non-methane hydrocarbons and dimethyl sulfide at a remote coastal location (Mace Head, Eire) July-August 1996 Faraday Transactions 93 2921-2927, 1997

Seakins PW, Nesbitt FL, Payne W, Stief LJ, Thorn RP, Robertson SH, Pilling MJ, Wardlaw DM Temperature and isotope dependence of the reaction of methyl radicals and atomic hydrogen Journal of Physical Chemistry B 101 9974-9987, 1997

Blitz M, Johnson D, Pesa M, Pilling MJ, Robertson SH, Seakins PW The temperature and isotope dependence of the reaction of CH with methane Faraday Transactions 93 pp.1473-, 1997

Lewis AC, McQuaid JB, Bartle KD, Pilling MJ, Ridgeon P, Seakins PW Atmospheric monitoring of volatile organic compounds using programmed temperature vaporisation injection. HRC - Journal of High Resolution Chromatography 686-690, 1996