Magnetic CoFe2O4 nanoparticle immobilized N-propyl diethylenetriamine sulfamic acid as an efficient and recyclable catalyst for the synthesis of amides via the Ritter reaction

Synthesis and characterization of glucosulfonic acid supported on Fe3O4 nanoparticles as a novel and magnetically recoverable nanocatalyst and its application in the synthesis of polyhydroquinoline and 2,3-dihydroquinazolin-4(1H)-one derivatives

“…As shown in figure The formation of a magnetite crystal phase in a Glucosulfonic acidcoated Fe 3 O 4 aggregate powder was identified from the X-ray diffraction pattern ( Figure 3). As seen in Figure 3, the iron oxide phase was identified from the XRD patterns by the peak positions at 30.2 (2 2 0), 35.5 (3 1 1), 43.0 (4 0 0), 57.1 (5 1 1) and 62.9 (4 4 0), which were in agreement with magnetite standard data [32]. One indication of bond formation between the Fe 3 O 4 and the catalyst can be inferred from thermogravimetric analysis (TGA).…”

Synthesis and Characterization of Functionalize HY Zeolite With Sulfunic Acid, A Micro-meso Structure as an Efficient Reusable Catalyst in Organic Transformations

“…While the XRD analysis is not quantitative, the diffraction patterns after the binding of 3-APTES and also after the grafting of sulfunic acid are similar to that of the pure zeolite support. According to similar studies, in the present study no changes were detected in the crystalline structure of zeolite during the immobilization procedures, also the percentage of amorphous phase is small [33]. Fig.…”

Schiff base complexes of Ni, Co, Cr, Cd and Zn supported on magnetic nanoparticles: As efficient and recyclable catalysts for the oxidation of sulfides and oxidative coupling of thiols

“…Figure 3 shows XRD pattern for Ni-Salen-MNPs, Co-SalenMNPs, Cr-Salen-MNPs, Cd-Salen-MNPs and Zn-Salen-MNPs. As seen in Figure 3, the iron oxide phase was identified from the XRD patterns by the peak positions at 30.5 (2 2 0), 35.7 (3 1 1), 43.5 (4 0 0), 53.9 (4 2 2), 57.3 (5 1 1) and 63 (4 4 0), which were in agreement with magnetite standard data [28]. (Figure 4).…”