“…However, these protocols suffered from some drawbacks such as the use of stoichiometric amount of catalysts and generation of vast amounts of corrosive wastes. In order to overcome these problems, many efforts have been developed for this transformation, and various catalysts have been developed including PS-TBMAC/ZnI 2 [6], salencomplexes [7][8][9][10][11], bromide [12], K 2 S 2 O 8 /NaBr [13], MOFs [14][15][16][17][18][19][20][21], quaternary ammonium hydroxide [22], supported imidazole [23], organocatalysts [24,25], and others [26][27][28][29]. However, some of these procedures still require Abstract A series of silica coated magnetic nanoparticles supported ILs were prepared, characterized and their catalytic performances in cycloaddition of CO 2 to epoxides were investigated.…”