Conclusions
-
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.
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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.
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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.
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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.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2702–2708, December, 1983.
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Darmanyan, A.P., Vidoczy, T., Irinii, G. et al. Influence of medium on lifetime and reactivity of1O2 with 1,3-diphenylisobenzofuran, and the role of1O2 in liquid-phase oxidation of ethylbenzene. Russ Chem Bull 32, 2423–2429 (1983). https://doi.org/10.1007/BF00954468
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DOI: https://doi.org/10.1007/BF00954468