Photodissociation of bromochlorobenzenes
2008 (English)In: Journal of Photochemistry and Photobiology A: Chemistry, ISSN 1010-6030, Vol. 195, no 2-3, 242-246 p.Article in journal (Refereed) Published
The photodissociation kinetics of 2-, 3- and 4-bromochlorobenzene (BrClPh) and bromo-3,5-dichlorobenzene (Br-diClPh) have been studied in a molecular beam following excitation at 270 nm using femtosecond pump-probe spectroscopy. The kinetics and the dissociation dynamics in the BrClPhs were found to resemble the BrFPhs much more than the BrBrPhs. In 2- and 3-BrClPh two dissociation channels were observed, whereas 4-BrCIPh and Br-3,5-diClPh dissociates via only one channel. The time constant for channel one, present in all molecules, depends on the number of chlorine atoms and their position. The absence of a second channel in 4-BrCIPh is a general property among mixed Br-(Br, Cl or F)-Phs and is likely to be due to a dissociation channel involving a triplet excitation.
Place, publisher, year, edition, pages
2008. Vol. 195, no 2-3, 242-246 p.
photodissociation, substituent effects, pump-probe spectroscopy, molecular beam, aryl halides
IdentifiersURN: urn:nbn:se:uu:diva-96971DOI: 10.1016/j.jphotochem.2007.10.008ISI: 000254763900013OAI: oai:DiVA.org:uu-96971DiVA: diva2:171724