Silver nanoparticles decorated on thiol-modified magnetic hydrotalcite (Fe3O4/HT-Pr-S-Ag): a novel, efficient and magnetically nanocatalyst for oxidation of alcohols

چکیده مقاله

Organic synthesis under the conditions with respect to the principle of green chemistry still continues to be explored today. For this purpose, to improve the long-term durability and activity of catalysts, hydrotalicites (HTs) and magnetic hydrotalcites (MHTs) have been widely studied as promising supporting materials for catalysts in organic reactions1-2. Widespread attention has been focused on selective oxidation of alcohols into the corresponding aldehydes and ketones3. A number of new catalytic systems based on silver in combination with different ligands have been investigated in oxidation reactions4. In summary we have successfully synthesized Ag immobilized on functionalized magnetic hydrotalcite (Fe3O4/ HT-Pr-S-Ag) from readily available starting materials. The applicability of nanocatalyst was explored in oxidation benzyl alcohols to corresponding benzaldehydes using tert-butyl hydroperoxide (TBHP) as an oxidant in ethanol as a safe solvent at 60 °C. Fig. 1 Oxidation benzyl alcohols References 1) Brasil, H.; Correˆa, J.; Nascimento, L.; Rumjanek, V.; Almeida, V.; Coral, N.; Rodrigues, E. Catal. Lett. 2016, 147, 391. 2) Jimenez-Sanchidrian, C.; Mora, M.; Ruiz, J. R. Catal. Commun., 2006, 7, 1025. 3) Bäckvall, J. E.; Modern Oxidation Methods, Wiley-VCH, Weinheim,Germany, 2004, 352. 4) Nasuha, N.; Hameed, B.H.; Din, A.T. J. Hazard. Mater. 2010, 175, 126.