No abstract

Nanomagnetic bisethylferrocene-containing ionic liquid supported on silicacoated iron oxide (Fe 3 O 4 @SiO 2 @Im-bisethylFc [HC 2 O 4 ]) as a novel catalyst was designed and synthesized. The described catalyst was recycled and used without change in the time and efficiency of the condensation reaction. The Fourier transform-infrared spectroscopy (FT-IR), scanning electron microscopy images, X-ray diffraction patterns, energy-dispersive X-ray spectroscopy, transmission electron microscope and vibrating-sample magnetometer results confirmed the formation of Fe 3 O 4 @SiO 2 @Im-bisethylFc [HC 2 O 4 ] magnetic nanoparticle. The novel bis-coumarin derivatives were identified by 1 H-NMR, 13 C-NMR, FT-IR and CHNS analysis.