Near-ultraviolet absorption cross sections of nitrophenols and their potential influence on tropospheric oxidation capacity

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dc.contributor.authorChen, Jun
dc.contributor.authorWenger, John C.
dc.contributor.authorVenables, Dean S.
dc.contributor.funderEuropean Commissionen
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2012-11-20T17:10:49Z
dc.date.available2012-11-20T17:10:49Z
dc.date.issued2011-09-29
dc.date.updated2012-10-23T15:10:29Z
dc.description.abstractNitrophenols and methylnitrophenols have been identified as photolytic precursors of nitrous acid, HONO, but their gas-phase absorption has not previously been reported. In this study, the absorption cross sections of 2-nitrophenol, 3-methyl-2-nitrophenol, and 4-methyl-2-nitrophenol were measured from 320 to 450 nm using incoherent broad-band cavity enhanced absorption spectroscopy (IBBCEAS). The benzaldehyde absorption spectrum wasmeasured to validate the approach and was in good agreement with literature spectra. The nitrophenol absorption cross sections are large (ca. 10-17 cm2 molecule-1)  and blue-shifted about 20 nm compared to previously measured solution spectra. Besides forming HONO, nitrophenol absorption influences other photochemistry by reducing the available actinic flux. The magnitudes of both effects are evaluated as a function of solar zenith angle, and nitrophenol absorption is shown to lower the photolysis rates of O3 and NO2.en
dc.description.sponsorshipEuropean Commission (EU FP7 project EUROCHAMP2 (grant no. 228335)); Science Foundation Ireland (06/RFP/CHP055)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCHEN, J., WENGER, J. C. & VENABLES, D. S. 2011. Near-Ultraviolet Absorption Cross Sections of Nitrophenols and Their Potential Influence on Tropospheric Oxidation Capacity. The Journal of Physical Chemistry A, 115, 12235-12242. doi: http://dx.doi.org/10.1021/jp206929ren
dc.identifier.doi10.1021/jp206929r
dc.identifier.endpage12242en
dc.identifier.issn1089-5639
dc.identifier.issued44en
dc.identifier.journaltitleJournal of Physical Chemistry Aen
dc.identifier.startpage12235en
dc.identifier.urihttps://hdl.handle.net/10468/791
dc.identifier.volume115en
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.rightsCopyright © 2011 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry A, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/jp206929ren
dc.subjectPhotolysisen
dc.subjectBenzaldehydeen
dc.subjectBroadband cavity enhanced absorption spectroscopyen
dc.subjectAtmospheric simulation chamberen
dc.subjecttropospheric oxidationen
dc.subject.lcshAtmospheric chemistryen
dc.subject.lcshAbsorption spectraen
dc.titleNear-ultraviolet absorption cross sections of nitrophenols and their potential influence on tropospheric oxidation capacityen
dc.typeArticle (peer-reviewed)en
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