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| Titel |
Rate coefficients for the reaction of the hydroxyl radical with pyrrole |
| VerfasserIn |
Terry J. Dillon, Katrin Dulitz, Abraham Horowitz, Maria E. Tucceri, John N. Crowley |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250033580
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| Zusammenfassung |
| The pulsed laser photolysis technique of radical generation, coupled to pulsed laser
induced fluorescence detection of OH was used to measure absolute rate coefficients
k1(P , T) for the title reaction, OH + C4H5N - products (R1). Experiments were
conducted in conditions of temperature and pressure representative of the Earth’s
atmosphere, including for the first time at T < 298 K. Such conditions are frequently
encountered in the field where (R1) is used to calibrate an instrument measuring OH
reactivity. The accuracy of the data obtained was enhanced by on-line optical absorption
measurements of [C4H5N] using a value of Ï184.9nm = (1.26 ± 0.02)Ã10-17 cm2
molecule-1, which was determined in this work. Non-Arrhenius behaviour of k1(T)
was observed, in line with results from the literature that were obtained at higher
temperatures. Investigations of a possible pressure dependence in k1 are ongoing. |
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