The photochemistry of benzene in oxygenated aqueous solution in the1B2u first excited singlet state

Menahem Luria, Gabriel Stein*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The photochemistry of benzene in water, by excitation at 2288, 2537, and 2652 Å into different vibrational levels of the first excited singlet state (1B2u), gives in the presence of O2 at neutral pH only one major stable product. The kinetics and mechanism of its formation was investigated using continuous illumination and also flash photolysis techniques. The quantum yield of the product is steady with increasing quantum energy; the fluorescence yield decreases. A mechanism is proposed which involves formation of a labile energetic isomer of the ground state singlet from a nonstationary energy-rich state of the excited singlet before the fluorescent level is reached, and in competition with intersystem crossing. This labile isomer adds O2. The primary photooxide rearranges to give the final product.

Original languageEnglish
Pages (from-to)165-171
Number of pages7
JournalJournal of Physical Chemistry
Volume76
Issue number2
DOIs
StatePublished - 1972

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