Effect of Substituents on TiO2 Photocatalytic Oxidation of <i>trans</i>-Stilbenes

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  • Teruyuki Miyake
    Osaka Prefecture University College of Technology, 26-12 Saiwai, Neyagawa, Osaka 572-8572 , Japan
  • Yuichiro Hashimoto
    Osaka Prefecture University College of Technology, 26-12 Saiwai, Neyagawa, Osaka 572-8572 , Japan
  • Seihou Jinnai
    Osaka Prefecture University College of Technology, 26-12 Saiwai, Neyagawa, Osaka 572-8572 , Japan
  • Ryusei Oketani
    Osaka Prefecture University College of Technology, 26-12 Saiwai, Neyagawa, Osaka 572-8572 , Japan
  • Suguru Higashida
    Osaka Prefecture University College of Technology, 26-12 Saiwai, Neyagawa, Osaka 572-8572 , Japan

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<jats:title>Abstract</jats:title> <jats:p>Photocatalytic reaction of trans-stilbene on TiO2 particles produces benzaldehyde with high selectivity in acetonitrile-water mixed solvent. Introduction of electron-donating substituents to the benzene rings accelerated the reaction. On the other hand, the rate was decelerated by electron-withdrawing substituents. These results suggest that the reaction proceeds by hydroperoxo or hydroperoxy, which were formed on TiO2 surface by UV irradiation, rather than free OH radicals.</jats:p>

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