Two elusive radical intermediates; a methyl radical (·CH3) and a carboxymethyl radical (·CH2CO2H), have been confirmed for the first time by direct observation of their ESR absorptions at room temperature on the photocatalytic reactions of acetic acid and metal (platinum)-loaded titanium dioxide (Pt/TiO2) in aqueous solution.
M. Kaise, H. Kondoh, C. Nishihara, H. Nozoye, H. Shindo, S. Nimura and O. Kikuchi, J. Chem. Soc., Chem. Commun., 1993, 395 DOI: 10.1039/C39930000395
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