A novel magnetic supported dicationic ionic liquid namely Fe 3 O 4 @SiO 2 ⋅DIL has been prepared, and characterized by various analysis methods such as FT-IR, TEM, SEM, XRD, EDX, EDX mapping, and TGA. Afterward, catalytic activity of the Fe 3 O 4 @SiO 2 ⋅DIL has been examined in alcohols oxidation reaction. The resulting new nanocomposite as a heterogeneous catalyst displayed remarkable activity for the oxidation of various alcohols using H 2 O 2 under mild reaction conditions. Eventually, the as-prepared Fe 3 O 4 @SiO 2 ⋅DIL catalyst was also stable and reused at least five times without losing its catalytic activity and selectivity. Magnetic recoverability of the catalyst, high yields, good compliance with green chemistry protocols and economical are some advantages of the work.

In this research design and synthesis of the magnetic nanoparticle, coating by a silica shell and modified with dicationic ionic liquid is described. Characterization of Fe3O4@SiO2.DIL was done by means of techniques such as XRD, FTIR, SEM, EDX, TEM, and TGA. The catalytic activity of Fe3O4@SiO2.DIL as a new nanocatalyst was tested in the the one-pot tree-component synthesis of 1,8-dioxodecahydroacridines. To achieve higher yield of products, factors such as reaction temperature, reaction time, the amount of nanocatalyst and solvent were studied, and optimized conditions were investigated. The results indicated that the reaction time for aromatic aldehydes bearing substituent at para position is shorter and higher yields of products were obtained with these substrates. Short reaction time, high yield of products, easy purification and easy recoverable catalyst without significantly less of its activity are the main advantages of the process presented. The results clearly show that the existing catalytic system could be eco-friendly and economical to carry out this reaction.