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

Tadic, J. M.; Juranic, I. O.; Moortgat, G. K.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

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

MPS-Authors

/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;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

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.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-915A-5

Abstract

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.