Low temperature FTIR study of organic molecule ozonolysis in adsorbed state. Thymine, phenol and ethylene on SiO2

Abstract

Ethylene adsorbed on silica readily reacts with ozone even below 77K when the latter is adsorbed from the soln. in liq. O, leading to simultaneous formation of primary and secondary ozonides. If the excess of ozone is admitted from the gas phase at 77K, formaldehyde formation was also established. The rate of ozone reaction with mol. phenol hydrogen-bonded with silanol groups of silica is higher than that with the phenolate groups chem. bound to silica surface. Thymine adsorption on silica surface was tried by different methods. All the methods result in almost identical spectra, slightly dissimilar, evidently due to different amt. of residual water. [on SciFinder (R)]