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Article

Effect of Ultrasound on the Green Selective Oxidation of Benzyl Alcohol to Benzaldehyde

Univ. Savoie Mont Blanc, LCME, F-73000 Chambéry, France
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Academic Editor: Matteo Guidotti
Molecules 2019, 24(22), 4157; https://doi.org/10.3390/molecules24224157
Received: 8 October 2019 / Revised: 12 November 2019 / Accepted: 13 November 2019 / Published: 16 November 2019
(This article belongs to the Special Issue Sonochemistry and Green Chemistry Applications II)
Oxidation of alcohols plays an important role in industrial chemistry. Novel green techniques, such as sonochemistry, could be economically interesting by improving industrial synthesis yield. In this paper, we studied the selective oxidation of benzyl alcohol as a model of aromatic alcohol compound under various experimental parameters such as substrate concentration, oxidant nature and concentration, catalyst nature and concentration, temperature, pH, reaction duration, and ultrasound frequency. The influence of each parameter was studied with and without ultrasound to identify the individual sonochemical effect on the transformation. Our main finding was an increase in the yield and selectivity for benzaldehyde under ultrasonic conditions. Hydrogen peroxide and iron sulfate were used as green oxidant and catalyst. Coupled with ultrasound, these conditions increased the benzaldehyde yield by +45% compared to silent conditions. Investigation concerning the transformation mechanism revealed the involvement of radical species. View Full-Text
Keywords: sonochemistry; ultrasound; hydroxyl radical; selective oxidation; benzyl alcohol; benzaldehyde sonochemistry; ultrasound; hydroxyl radical; selective oxidation; benzyl alcohol; benzaldehyde
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MDPI and ACS Style

Chevallier, M.L.; Dessolin, S.; Serres, F.; Bruyas, L.; Chatel, G. Effect of Ultrasound on the Green Selective Oxidation of Benzyl Alcohol to Benzaldehyde. Molecules 2019, 24, 4157. https://doi.org/10.3390/molecules24224157

AMA Style

Chevallier ML, Dessolin S, Serres F, Bruyas L, Chatel G. Effect of Ultrasound on the Green Selective Oxidation of Benzyl Alcohol to Benzaldehyde. Molecules. 2019; 24(22):4157. https://doi.org/10.3390/molecules24224157

Chicago/Turabian Style

Chevallier, Marion L., Sarah Dessolin, Fanny Serres, Lucile Bruyas, and Gregory Chatel. 2019. "Effect of Ultrasound on the Green Selective Oxidation of Benzyl Alcohol to Benzaldehyde" Molecules 24, no. 22: 4157. https://doi.org/10.3390/molecules24224157

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