tPiperonal (heliotropine or 3,4-methylenedioxybenzaldehyde) has been synthesized by oxidizing piper-onyl alcohol in aqueous UV-irradiated TiO2suspensions. This compound was identified by GC–MSchromatography,1H NMR and melting point determination. The other products of the photoprocess were1,3-bis(3,4-(methylenedioxy)benzyl) ether (found in traces) and CO2, derived from the parallel pathwayof photo-mineralization. Commercial and home-prepared TiO2samples have been tested and the bestselectivity (ca. 35%) was obtained by using the home-prepared ones. The reported green process allowsto obtain an added value product (piperonal), upon partial oxidation of a cheap reagent.
Bellardita, M., Loddo, V., Palmisano, G., Pibiri, I., Palmisano, L., Augugliaro, V. (2014). Photocatalytic green synthesis of piperonal in aqueous TiO2 suspension. APPLIED CATALYSIS. B, ENVIRONMENTAL, 144, 607-613 [10.1016/j.apcatb.2013.07.070].
Photocatalytic green synthesis of piperonal in aqueous TiO2 suspension
BELLARDITA, Marianna;LODDO, Vittorio;PALMISANO, Giovanni;PIBIRI, Ivana;PALMISANO, Leonardo;AUGUGLIARO, Vincenzo
2014-01-01
Abstract
tPiperonal (heliotropine or 3,4-methylenedioxybenzaldehyde) has been synthesized by oxidizing piper-onyl alcohol in aqueous UV-irradiated TiO2suspensions. This compound was identified by GC–MSchromatography,1H NMR and melting point determination. The other products of the photoprocess were1,3-bis(3,4-(methylenedioxy)benzyl) ether (found in traces) and CO2, derived from the parallel pathwayof photo-mineralization. Commercial and home-prepared TiO2samples have been tested and the bestselectivity (ca. 35%) was obtained by using the home-prepared ones. The reported green process allowsto obtain an added value product (piperonal), upon partial oxidation of a cheap reagent.
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