Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Photooxidation of n-hexanal in air
Autore:
Tadic, J; Juranic, I; Moortgat, GK;
Indirizzi:
IChTM, Ctr Chem, YU-11001 Belgrade, Yugoslavia IChTM Belgrade YugoslaviaYU-11001 r Chem, YU-11001 Belgrade, Yugoslavia Univ Belgrade, Fac Chem, YU-11001 Belgrade, Yugoslavia Univ Belgrade Belgrade Yugoslavia YU-11001 YU-11001 Belgrade, Yugoslavia Max Planck Inst Chem, Atmospher Chem Dept, D-55020 Mainz, Germany Max Planck Inst Chem Mainz Germany D-55020 Dept, D-55020 Mainz, Germany
Titolo Testata:
MOLECULES
fascicolo: 4, volume: 6, anno: 2001,
pagine: 287 - 299
SICI:
1420-3049(200104)6:4<287:PONIA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
WAVELENGTH DEPENDENCE; ABSORPTION-SPECTRA; PHOTO-DISSOCIATION; 330 NM; PROPIONALDEHYDE; FORMALDEHYDE; PHOTOCHEMISTRY; OXIDATION; RADICALS; 300-K;
Keywords:
photolysis; photooxidation; aldehydes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Tadic, J IChTM, Ctr Chem, POB 815,Studentski Trg 12-16, YU-11001 Belgrade,Yugoslavia IChTM POB 815,Studentski Trg 12-16 Belgrade Yugoslavia YU-11001
Citazione:
J. Tadic et al., "Photooxidation of n-hexanal in air", MOLECULES, 6(4), 2001, pp. 287-299

Abstract

Dilute mixtures of hexanal in synthetic air (up to 100 ppm) were photolyzed with fluorescent UV lamps (275-380 nm) in air at 298 K. The main photooxidation products, identified and quantitatively analyzed by FTIR spectroscopy, were butene, CO, vinylalcohol and ethanal. The photolysis rates and the absolute quantum yield Phi were found to be slightly dependent on the totalpressure. At 100 Torr, Phi (100) = 0.43 +/- 0.02, whereas at 700 Torr the total quantum yield was Phi (700) = 0.38 +/- 0.02. These results may be explained by the collisional deactivations of photoexcited molecules. Two decomposition channels were identified: the radical channel C5H11CHO --> C5H11 HCO, and the molecular channel C5H11CHO --> C4H8 + CH2=CHOH, having the relative yields of 27 and 73 % at 700 Torr. The product CH2=CHOH tautomerizes to ethanal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 08:57:51