Influence of medium on lifetime and reactivity of1O2 with 1,3-diphenylisobenzofuran, and the role of1O2 in liquid-phase oxidation of ethylbenzene

A. P. Darmanyan, T. Vidoczy, G. Irinii, D. Gal

Research output: Article


1. The destruction of1O2 in the course of liquid-phase oxidation of ethylbenzene in the group of solvents examined in this work is accomplished through a mechanism of resonance transfer of energy to higher vibrational levels of the ground state of the molecules of the medium. 2. The rate constant for the chemical reaction of1O2 with 1,3-diphenylisobenzofuran (DPBF) increases with increasing dielectric constant of the medium, as a result of strong solvation of the transition complex; in high-viscosity polar solvents, the reaction rate is limited by diffusion of the molecules. 3. A substantial contribution to the reactivity of1O2 with DPBF in ethylbenzene and in methyl phenyl carbinol is made by specific interactions with the solvent molecules. 4. In the process of liquid-phase oxidation of ethylbenzene, singlet oxygen does not participate in chemical reactions leading to the formation of oxygen-containing products; deactivation of the singlet oxygen is accomplished through a physical mechanism of energy transfer to the solvent molecules.

Original languageEnglish
Pages (from-to)2423-2429
Number of pages7
JournalBulletin of the Academy of Sciences of the USSR Division of Chemical Science
Issue number12
Publication statusPublished - dec. 1983

ASJC Scopus subject areas

  • Chemistry(all)

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