Matrix effects on the photocatalytic oxidation of alcohols by [nBu4N]4W10O32 incorporated into sol-gel silica

Dalton Transactions : an International Journal of Inorganic Chemistry
Alessandra MolinariAndrea Maldotti

Abstract

Two heterogeneous photocatalysts have been prepared by entrapment of [nBu(4)N](4)W(10)O(32) in a silica matrix, through a sol-gel procedure: SiO(2)/W30% and SiO(2)/W10% with 30% and 10% of decatungstate, respectively. They are characterized by the presence of micropores of about 7 A and 15 A and mesopores of about 25 A. Due to different preparation procedures, SiO(2)/W10% presents a more remarkable porous network than SiO(2)/W30%. The morphological features of SiO(2)/W30% and SiO(2)/W10% differ from those of their parent material SiO(2)/W0%, indicating that incorporation of the decatungstate induces a significant modification of the porous texture of the siliceous material. These photocatalysts demonstrate good stability in the oxygen-assisted photooxidation of 1-pentanol and 3-pentanol, which have been chosen as models of primary and secondary aliphatic alcohols. In particular, photoexcitation (lambda > 290 nm, 25 degrees C, 760 torr of O(2)) leads to conversion of these two substrates to pentanal or 3-pentanone, with a mass balance of about 90%. There is a strong effect of the solid support on the reactivity of the two alcoholic substrates. In particular, oxidation of 1-pentanol with SiO(2)/W10% is about four times faster tha...Continue Reading

References

Oct 10, 2002·Chemical Reviews·Andrea MaldottiRossano Amadelli
Jun 10, 2004·Chemical Reviews·Tamas Mallat, Alfons Baiker
May 9, 2009·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Alessandra MolinariAndrea Maldotti
Aug 20, 2009·Chemical Society Reviews·Manolis D TzirakisMichael Orfanopoulos

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Citations

May 20, 2014·Environmental Science and Pollution Research International·Eliana S Da SilvaMohamed Sarakha
Jan 28, 2014·Photochemistry and Photobiology·Laura A PeñaPatrick E Hoggard
Aug 27, 2014·Photochemistry and Photobiology·Brent M Harvey, Patrick E Hoggard
Aug 3, 2012·Organic Letters·Sara MontanaroAngelo Albini
Nov 6, 2014·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Theodoros S SymeonidisIoannis N Lykakis
Jan 23, 2013·Physical Chemistry Chemical Physics : PCCP·Davide RavelliAlessandro Bagno
Aug 7, 2021·Chemical Reviews·Luca CapaldoMaurizio Fagnoni

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