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Photo- And Radical induced Reactivity of Atmospheric Oxidants

Total Cost €


EC-Contrib. €






 PhARRAO project word cloud

Explore the words cloud of the PhARRAO project. It provides you a very rough idea of what is the project "PhARRAO" about.

situ    haps    theoretical    uv    atmospheric    en    capability    substituted    hydroxyalkyl    effect    extrapolation    fundamental    alkenes    predict    spectroscopy    photoionization    seek    hpas    decay    enhanced    domain    barrier    formed    mass    appearance    combination    pump    rate    cutting    near    species    tropospheric    pressure    complexation    plus    criegee    direct    cis    calculations    oxides    measured    pertinent    cavity    vibrational    dependent    transfer    identification    carbonyl    collision    activation    intermediates    peroxy    synthesized    absorption    correspondence    reaction    route    oh    coupled    reactivity    mechanisms    free    edge    probe    kinetics    radical    time    experimental    rates    oxidizing    determined    source    explored    monitored    decomposition    thermal    radicals    complemented    narrow    chemistry    bandwidth    lab    ring    vacuum    context    water    firstly    hydrogen    spectrometry    alkyl    ir    vuv    apparatuses    temperature    agents    explore   

Project "PhARRAO" data sheet

The following table provides information about the project.


Organization address
postcode: BS8 1QU

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Total cost 251˙857 €
 EC max contribution 251˙857 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-GF
 Starting year 2017
 Duration (year-month-day) from 2017-07-01   to  2020-07-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITY OF BRISTOL UK (BRISTOL) coordinator 251˙857.00


 Project objective

The research program will seek to explore the mechanisms and formation/reaction rates of various oxidizing agents pertinent to tropospheric chemistry, using cutting-edge experimental apparatuses and theoretical methods. Firstly, the decay of carbonyl oxides (Criegee intermediates – CIs) will be explored as an important source of OH radicals – fundamental species for the tropospheric oxidizing capability. This will be achieved via a combination of thermal and collision-free experimental measurements. The rate of appearance of OH radicals will be monitored via time-domain measurements (narrow bandwidth IR pump-UV probe). In such approach, the vibrational activation of various alkyl-substituted CIs promoting OH radical production will be explored. Theoretical calculations will predict the OH formation rate from the CIs in correspondence to the barrier for 1,4 hydrogen transfer en route to the products. Temperature and pressure dependent kinetics for the decomposition of the CIs will be determined under atmospheric conditions using cavity-ring down spectroscopy. Finally, the reactivity of various hydroxyalkyl peroxy radicals (HAPs), formed via OH plus alkenes reaction, will be studied. Direct identification of the in situ synthesized HAPs will be carried out in high vacuum via VUV photoionization coupled with mass spectrometry. Temperature and pressure dependent kinetics will be measured for the reaction of the HPAs with various species at atmospheric conditions via near-IR cavity-enhanced absorption spectroscopy. The effect of water complexation on the reaction rates will be explored. All experimental measurements will be complemented by high level theoretical methods and robust atmospheric modelling for extrapolation of the lab results to the atmospheric context.


year authors and title journal last update
List of publications.
2018 Michael F. Vansco, Barbara Marchetti, Marsha I. Lester
Electronic spectroscopy of methyl vinyl ketone oxide: A four-carbon unsaturated Criegee intermediate from isoprene ozonolysis
published pages: 244309, ISSN: 0021-9606, DOI: 10.1063/1.5064716
The Journal of Chemical Physics 149/24 2019-11-11

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The information about "PHARRAO" are provided by the European Opendata Portal: CORDIS opendata.

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