Detection of Ethylene-Ozone and Cyclohexene-Ozone Charge-Transfer Complexes in Cryogenic Matrixes

Abstract

In 1971 Bailey and co-workers reported the first observation of a charge-transfer complex of ozone with an aromatic system.1 23At the time complexes were suggested as possible

Visible-light-Induced Reaction of an Ozone–Trimethylamine Complex Studied by Matrix-Isolation IR and Visible Absorption Spectroscopies

“…Two photoreaction processes produce highly reactive species O­( 1 D) with O 2 from O 3 by irradiations at λ < 310 and 411 nm. − Although another process to produce O­( 3 P) and O 2 from O 3 by longer-wavelength irradiation is also familiar, it is not of much importance with reference to the atmosphere because the transition coefficient is either very low or is optically inhibited. However, some researchers reported that molecular complexes composed of O 3 and several molecules like olefin, ethylene, dimethylsulfide, and so on , have intense absorption bands in the visible-light region, in contrast to the O 3 monomer, and that visible-light-induced oxygen-atom transfer from O 3 to the counter molecule can occur in these complexes. − For example, an O 3 –ICl complex yields OICl by visible-light irradiation between wavelengths 470 and 750 nm, and an O 3 -dimethylsulfide complex yields dimethylsulfoxide upon red-light irradiation (λ = 700–740 nm) . The enhanced visible-light absorption and photoreaction mechanism of O 3 -molecule complexes are interesting in molecular chemistry.…”

Quantum Chemical Study of the Initial Step of Ozone Addition to the Double Bond of Ethylene

“…There are other hypotheses for the reaction mechanism: electron transfer with the formation of an ion–radical complex in the reactions of electron-donor substituted alkenes and H atom abstraction from ethylene . There are no data confirming the one-electron transfer for the reaction C 2 H 4 + O 3 → products in the gas phase . Several reaction channels after POZ have been considered for the gas-phase reaction …”

Observation of Light-Induced Reactions of Olefin–Ozone Complexes in Cryogenic Matrices Using Fourier-Transform Infrared Spectroscopy

“…The observation of CT bands has been reported for some organic molecule-ozone complexes [4][5][6][7]. Jonnalagadda et al measured the CT band for the C 2 H 4 -O 3 complex in the Xe matrix [6]. The spectrum shows a maximum at ca.…”

“…Regarding the C 2 H 4 -O 3 system, we could not observe photoproducts spectroscopically upon irradiation at 405 nm, and there might be a "gap" in the CT band around this wavelength, whereas no such depletion of photolysis was found for other olefins. The observation of CT bands has been reported for some organic molecule-ozone complexes [4][5][6][7]. Jonnalagadda et al measured the CT band for the C 2 H 4 -O 3 complex in the Xe matrix [6].…”

“…The key reactants for the oxidation processes are ozone (O 3 ), hydroxyl (OH), and nitrate (NO 3 ) radicals. Ozone forms charge-transfer (CT) complexes with various organic molecules, and exhibits strong CT bands in the ultraviolet-visible (UV-VIS) region [4][5][6][7]. The oxidation processes involve reactions in both light and dark conditions; therefore, it is important to understand how light-induced oxidation proceeds in the olefin-ozone system.…”