Triplet state properties of dichlorobenzenes

Z. B. Alfassi, C. M. Previtali

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The triplet-triplet absorption spectra have been determined by laser flash photolysis for ortho, meta and para dichlorobenzene. The wavelength of maximum absorption λmax was 290 nm for both the ortho and meta isomers and was 310 nm for the para isomer. The triplet decay was studied in cyclohexane and in methanol. It was found to be a function of the initial triplet concentration and the rate constants for triplet-triplet annihilation and the first-order decay were obtained. The relative triplet yields in methanol were determined by energy transfer to anthracene, and absolute quantum yields were estimated. From this and comparison with literature data for the photodecomposition quantum yields, it was concluded that the photochemically active state in methanol is the excited singlet.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalJournal of Photochemistry
Issue number2
StatePublished - 1 Jan 1985
Externally publishedYes


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