عنوان	Synthesis and characterization of bromine source supported on magnetic Fe3O4 nanoparticles: A new, versatile and efficient magnetically separable catalyst for organic synthesis
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Br3‐TBA‐Fe3O4, 2,3‐dihydroquinazolin‐4(1H)‐one, Knoevenagel condensation, magnetically separable catalyst, polyhydroquinoline
چکیده	Tribenzylammonium tribromide supported onto magnetic nanoparticles (Br3‐TBA‐ Fe3O4) as a bromine source was successfully synthesized and characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis, X‐ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy and vibrating sample magnetometry. The synthesized catalyst is shown to be a versatile and highly efficient heterogeneous catalyst for the Knoevenagel condensation and synthesis of 2,3‐dihydroquinazolin‐4(1H)‐one and polyhydroquinoline derivatives. To the best of the authors' knowledge, this is the first report of the use of a bromine source immobilized on Fe3O4 nanoparticles as a magnetically separable catalyst for these reactions. The nanosolid catalyst can be magnetically recovered and reused readily several times without significant loss in catalytic efficiency.
پژوهشگران	لطفی شیری (نفر اول)، آرش قربانی چقامارانی (نفر دوم)، مصطفی کاظمی (نفر سوم)