Abstract
A novel Mn-containing ionic liquid and ethyl based magnetic organosilica with core-shell structure (Fe3O4@OS/IL-Mn) is prepared, characterized and applied as powerful and recoverable nanocatalyst. The Fe3O4@OS/IL-Mn was prepared via simultaneous coating of tetramethoxysilane (TMOS) and 1,2-bis(triethoxysilyl)ethane (BTEE) over magnetite nanoparticles (MNPs) followed by treatment with ionic liquid and manganese acetate. This catalyst was characterized using scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), energy dispersive X-ray (EDX) spectroscopy, powder X-ray diffraction (PXRD), vibrating sample magnetometer (VSM) and FT-IR spectroscopy. The Fe3O4@OS/IL-Mn was used as an efficient catalyst for the one-pot preparation of biologically useful 2H-indazolo-[2,1-b]-phthalazin-trions under green conditions. The recoverability, reusability and durability of the designed catalyst have also been studied under applied conditions.
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