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Quenching of an Aniline Radical Cation by Dissolved Organic Matter and Phenols: A Laser Flash Photolysis Study

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00114580" target="_blank" >RIV/00216224:14310/20:00114580 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1021/acs.est.0c05230" target="_blank" >https://doi.org/10.1021/acs.est.0c05230</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1021/acs.est.0c05230" target="_blank" >10.1021/acs.est.0c05230</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Quenching of an Aniline Radical Cation by Dissolved Organic Matter and Phenols: A Laser Flash Photolysis Study

  • Original language description

    Aromatic amines are relevant aquatic organic contaminants whose photochemical transformation is affected by dissolved organic matter (DOM). The goal of this study is to elucidate the underlying mechanism of the inhibitory effect of DOM on such reactions. The selected model aromatic amine, 4-(dimethylamino)benzonitrile (DMABN), was subjected to laser flash photolysis in the presence and absence of various model photosensitizers. The produced radical cation (DMABN(.+)) was observed to react with several phenols and different types of DOM on a time scale of similar to 100 mu s. The determined second-order rate constants for the quenching of DMABN(.+) by phenols were in the range of (1.4-26) X 10(8) M-1 s(-1) and increased with increasing electron donor character of the aromatic ring substituent. For DOM, quenching rate constants increased with the phenolic content of the DOM. These results indicate the reduction of DMABN(.+) to re-form its parent compound as the basic reaction governing the inhibitory effect. In addition, the photosensitized oxidation of the sulfonamide antibiotic sulfadiazine (SDZ) was studied. The observed radical intermediate of SDZ was quenched by 4-methoxyphenol less effectively than DMABN(.+), which was attributed to the lower reduction potential of the SDZ-derived radical compared to DMABN(.+).

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10403 - Physical chemistry

Result continuities

  • Project

    <a href="/en/project/GA19-08239S" target="_blank" >GA19-08239S: The Spectroscopy and Microscopy of Chemical Compounds in Ice within the Environmental and Pharmaceutical Domains</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Environmental Science and Technology

  • ISSN

    0013-936X

  • e-ISSN

    1520-5851

  • Volume of the periodical

    54

  • Issue of the periodical within the volume

    23

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

    15057-15065

  • UT code for WoS article

    000596728600032

  • EID of the result in the Scopus database

    2-s2.0-85096560900