Journal
MICROMACHINES
Volume 12, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/mi12111307
Keywords
molecular oxygen; oxidation; high power UV-LED; benzyl alcohol; benzoic acid
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Funding
- New Energy and Industrial Technology Development Organization (NEDO) [JPNP14004]
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High-power UV-LED irradiation effectively accelerated the decatungstate-anion-catalyzed oxidation reaction of benzyl alcohol, leading to increased yield and selectivity of benzoic acid. The combination of a flow photoreactor and high-power irradiation reduced the reaction time to minutes.
High-power UV-LED irradiation (365 nm) effectively accelerated the decatungstate-anion-catalyzed oxidation of benzyl alcohol 1 to benzoic acid 3 via benzaldehyde 2. As the power of the UV-LED light increased, both the selectivity and yield of benzoic acid also increased. The reaction was finished within 1 h to give 3 in a 93% yield using 2 mol% of decatungstate anion catalyst. The combination of a flow photoreactor and high-power irradiation accelerated the oxidation reaction to an interval of only a few minutes.
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