Plasmon Assisted Oxidation of Aromatic Alcohols Using Light Emitting Diodes and Photochemically Generated Supported Au Nanoparticles

GENIECE L.HALLETT-TAPLEY; JAZMÍN SILVERO; MARÍA GONZÁLEZ-BÉJAR; J.C NETTO-FERREIRA; J. C. SCAIANO

Ottawa - Ontario

Congreso; INTERNATIONAL IUPAC CONFERENCE ON GREEN CHEMISTRY; 2010

IUPAC

Plasmon Assisted Oxidation of Aromatic Alcohols Using Light Emitting Diodes and Photochemically Generated Supported Au Nanoparticles Geniece L.Hallett-Tapley, Jazmín Silvero, María González-Béjar, J.C Netto-Ferreira and J. C. Scaiano Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa K1N 6N5, Canada Supported Au nanoparticles (AuNP) have gained considerable recognition as environmentally friendly catalysts which can be developed at minimal costs and have been shown to catalyze various organic reactions (such as alcohol oxidations) as effectively or better than the harsh chemicals currently used. Previous work on Au catalyzed alcohol oxidations has focused on the use of thermal bench top methods.1 In this work, Plasmon Assisted Catalysis (PAC) is exploited, whereby excitation of the surface plasmon band of the AuNP (lmax = 532 nm) using 4, 530 nm light emitting diodes (LEDs) results in a highly efficient conversion of light to heat on the nanoparticle surface (photothermal effect). Au supported on hydrotalcite (HT), TiO2 P25, and g-Al2O3 have been successfully used in the oxidation of sec-phenethyl, benzyl and cinnamyl alcohols in the presence of H2O2 and in the absence of a solvent. 1. Mitsudome, T.; Noujima, A.; Mizugaki, T.; Jitsukawa, K.; Kaneda, K. Adv. Synth. Catal. 2009, 351, 1890-1896.