An efficient and selective photochemical method for the oxidation of benzylic alcohols has been achieved using phosphotungstic acid supported on imidazole functionalized silica coated cobalt ferrite nanoparticles as a magnetically photocatalyst in acetonitrile with O2. The photocatalyst has been reused several times, without observable loss of activity and selectivity. Results showed this heterogeneous photocatalyst is more active than the unsupported H3PW12O40.
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Afshari, M., Gorjizadeh, M., & Afshar, G. (2013). Phosphotungstic acid supported on magnetic nanoparticle used as selective and reusable photocatalyst for aerobic oxidation of benzylic alcohols. Oriental Journal of Chemistry, 29(4), 1675–1681. https://doi.org/10.13005/ojc/290457