OICC Press Iranian Journal of Catalysis 2345-4865 14 4 2024 11 16 [Fe3O4@SiO2@Si(CH2)3–NMe2–(CH2)2–NMe2–SO3H][Cl]2 as a novel magnetic nanocatalyst for the synthesis of bis(6-amino-1,3-dimethyl-uracil-5-yl) methanes 1 14 10.57647/j.ijc.2024.1404.45 EN Abdolkarim Zare Department of Chemistry, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, Iran https://orcid.org/0000-0002-8210-3155 Manije Dianat Department of Chemistry, Payame Noor University, Tehran, Iran Ahmad Reza Moosavi-Zare Chemistry Department, College of Sciences, Shiraz University, Shiraz, Iran  AND  Department of Chemical Engineering, Hamedan University of Technology, Hamedan, Iran https://orcid.org/0000-0003-0321-9326 Fatemeh Monfared Department of Chemistry, Payame Noor University, Tehran, Iran Journal Article 2024 11 16 A new magnetic nanomaterial, namely [Fe3O4@SiO2@Si(CH2)3–NMe2–(CH2)2–NMe2–SO3H][Cl]2 (FSCNSC) was synthesized, and characterized by energy-dispersive X-ray spectroscopy (EDS), elemental mapping, field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), FT-IR, vibrating-sample magnetometery (VSM), thermogravimetric (TG) and derivative thermogravimetry (DTG) analyses. Afterward, it was used as a highly effective catalyst for the synthesis of bis(6-amino-1,3-dimethyluracil-5-yl)methanes under solvent-free conditions. FSCNSC was better than many of the reported catalysts for the synthesis of this category of uracil derivatives in terms of the reaction conditions, the reaction times, and yields. Research Highlights: NMR analyses predicted the cost-effective replacement of ORR catalysts of PEMFCs. Ni-doped (1%) rutile catalyst shows a significant level of chemical shift and charge density of electrons. NMR is a potential analysis technique to measure the performances of a catalyst with surface defects.