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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.

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

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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