Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
Zur Ablage hinzufügen
  Lokale TagsFreigabegeschichteDetailsÜbersicht

Freigegeben
Zeitschriftenartikel

Photooxidation of n-heptanal in air: Norrish type I and II processes and quantum yield total pressure dependency

MPG-Autoren
/persons/resource/persons101300

Tadic,  J. M.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101144

Moortgat,  G. K.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

Externe Ressourcen
Es sind keine externen Ressourcen hinterlegt
Volltexte (beschränkter Zugriff)
Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte in PuRe verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Tadic, J. M., Juranic, I. O., & Moortgat, G. K. (2002). Photooxidation of n-heptanal in air: Norrish type I and II processes and quantum yield total pressure dependency. Journal of the Chemical Society, Perkin Transactions 2, (1), 135-140.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0014-915A-5
Zusammenfassung
Dilute mixtures of n-heptanal in synthetic air (up to 100 ppm) were photolyzed with fluorescent UV lamps (275-380 nm) at 298 K. The main photooxidation products, identified and quantitatively analyzed by FTIR spectroscopy, were pent-1-ene, CO, vinyl alcohol and ethanal. The photolysis rates and the absolute quantum yields Phi were found to be slightly dependent on the total pressure. At 100 Torr, Phi(100) = 0.36+/-0.03, whereas at 700 Torr the total quantum yield was Phi(700) = 0.31+/-0.01. The results may be explained by the collisional deactivation of photoexcited molecules. Two decomposition channels were identified: the radical channel C6H13CHO-->C6H13 + HCO, and the molecular channel C6H13CHO-->C5H10 + CH2=CHOH, having the absolute quantum yields of 0.031 and 0.118 at 700 Torr. The product CH2=CHOH tautomerizes to ethanal.