Superparamagnetic Core‐Shell‐Type Fe₃O₄/Ru Nanoparticles as Catalysts for the Selective Hydrogenation of an Unconstrained α,β‐Unsaturated Ketone

Abstract

Superparamagnetic core-shell-type Fe 3 O 4 /Ru nanoparticles (particle size ca. 15 nm) synthesized by co-precipitation, adsorption and reduction methods were found to selectively hydrogenate the carbon-oxygen double bond in trans-4-phenyl-3-penten-2-one (conversion 100 %, selectivity Ͼ 90 %)

Magnetite and Metal‐Impregnated Magnetite Catalysts in Organic Synthesis: A Very Old Concept with New Promising Perspectives

“…The catalyst presented an average particle size of 15 nm. The presence of Ru, confirmed by EDAX and ICP‐OES analysis, decreased the saturation magnetization in comparison with the bulk magnetite …”

ChemInform Abstract: Magnetite and Metal‐Impregnated Magnetite Catalysts in Organic Synthesis: A Very Old Concept with New Promising Perspectives

“…The presence of Ru,c onfirmed by EDAX and ICP-OESa nalysis, decreasedt he saturation magnetization in comparison with the bulk magnetite. [80] Finally,i ti sa lso remarkable the use of the aforementioned catalystf or the N-alkylation of amines, nitroarenes, sulfonamides,a nd sulfinimidesu sing alcohols as electrophiles through ah ydrogen autotransfer process. [56] In most cases,t he corresponding secondary amines (or imines) were obtained in good to excellenty ields (Table 4).…”

Synthesis and characterization of a novel ruthenium(ii) trisbipyridine complex magnetic nanocomposite for the selective oxidation of phenols

“…[19][20][21] Loading them onto macromolecular systems such as dendrimers, metallocages, liposomes, and nanoparticles equipped Ru(arene) and other metal complexes with the capacity to target tumors. 22 By using catalysts on macromolecular supports, problems such as separation of catalyst from the obtained products, and recycling of the catalyst may be solved, 23 as was observed in the study by Süss-Fink et al, which was performed for Ru/ superparamagnetic iron oxide nanoparticles (SPIONs), 24 as well as that by Fan and colleagues relating to Ru(arene) organometallics. 25 Moreover, such enhancement opens up opportunities in this eld such as molecular nanomagnet development and also single molecule magnet preparation.…”