Solution Synthesis of N,N-Dimethylformamide-stabilized Iron Oxide Nanoparticles as an Efficient and Recyclable Catalyst for Alkene Hydrosilylation
Ryusei Azuma,Seiya Nakamichi,Jungo Kimura,Hiroki Yano,Hideya Kawasaki,Takeyuki Suzuki,Ryota Kondo,Yasuharu Kanda,Ken-ichi Shimizu,Kazuo Kato,Yasushi Obora*
Highly activated, monodisperse N,N-dimethylformamide (DMF)-stabilized iron oxide nanoparticles (Fe2O3 NPs) were synthesized using Iron(III) acethylacetonate as a precursor under open air conditions. The resulting Fe2O3 NPs were characterized using various techniques (e.g. TEM, DLS, XRD, XPS, FT-IR, XANES). The Fe2O3 NPs exhibited efficient catalytic activity for the hydrosilylation of alkenes, without the need for further additives. Effective recycling process of the colloidal catalyst by extraction with a hexane-DMF system was developed and multiple recycles of the catalyst resulted in no significant loss of catalytic activity at least five times.