Preparation of core/shell nanostructure Fe3O4@PEG400-SO3H as heterogeneous and magnetically recyclable nanocatalyst for one-pot synthesis of substituted pyrroles by Paal-Knorr reaction at room temperature
محل انتشار: اولین کنفرانس ملی نانو از سنتز تا صنعت
سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 583
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شناسه ملی سند علمی:
NFSI01_092
تاریخ نمایه سازی: 17 آبان 1396
چکیده مقاله:
An efficient procedure has been proposed for the loading of sulfonic acid groups on the exterior of polyethylene glycol 400 (PEG400)-encapsulated Fe3O4 nanoparticles to synthesize a core-shell Fe3O4@PEG400-SO3H nanocatalyst. Surface functionalization of magnetic particles in such a way is a refined method of bridging the gap amongst heterogeneous and homogeneous catalysis. The procured nanocatalyst was classified through Fourier transformed infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), wavelength-dispersive X-ray spectroscopy (WDX), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), BET, and back titration. The nanoparticles have been utilized as a convenient catalyst for synthesizing a variety of N-substituted pyrroles via Paal-Knorr reactions of γ-diketones with amines, diamines or triamines at room temperature under solvent-free conditions. Notably, the newly produced catalyst was recoverable and recyclable (9 times) without any noticeable decrease in its activity
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نویسندگان
Fahimeh Bonyasi
Department of Medicinal Chemistry, Faculty of Pharmacy, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran
Malak Hekmati
Department of Medicinal Chemistry, Faculty of Pharmacy, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran
Hojat Veisi
Department of Chemistry, Payame Noor University, Tehran, Iran