A diselenobis-functionalized magnetic catalyst based on iron oxide/silica nanoparticles suggested for amidation reactions

Abstract

In this study, a new heterogeneous magnetic catalytic system based on selenium-functionalized iron oxide nanoparticles is presented and suggested for facilitating amide/peptide bonds formation. The prepared nanocatalyst, entitled as “Fe3O4/SiO2-DSBA” (DSBA stands for 2,2′-diselanediylbis benzamide), has been precisely characterized for identifying its physicochemical properties. As the most brilliant point, the catalytic performance of the designed system can be mentioned, where only a small amount of Fe3O4/SiO2-DSBA (0.25 mol%) has resulted in 89% reaction yield, under a mild condition. Also, given high importance of green chemistry, convenient catalyst particles separation from the reaction medium through its paramagnetic property (ca. 30 emu·g−1) should be noticed. This particular property provided a substantial opportunity to recover the catalyst particles and successfully reuse them for at least three successive times. Moreover, due to showing other excellences, such as economic benefits and nontoxicity, the presented catalytic system is recommended to be scaled up and exploited in the industrial applications.

Vancomycin-Loaded Fe3O4/MOF-199 Core/Shell Cargo Encapsulated by Guanidylated−β-Cyclodextrine: An Effective Antimicrobial Nanotherapeutic

“…In the next step, two prepared compounds were conjugated by the amide bonds to form the final product structure. The Fe 3 O 4 @SiO 2 /MOF-199-VAN consisted of a magnetic iron oxide core obtained from the codeposition method of iron chloride salts, coated by a silica network as a linker . In the next stage, the Cu­(II) ions are coordinated with the oxygen atoms of the silica network .…”

“…The Fe 3 O 4 @SiO 2 / MOF-199-VAN consisted of a magnetic iron oxide core obtained from the codeposition method of iron chloride salts, 40 coated by a silica network as a linker. 41 In the next stage, the Cu(II) ions are coordinated with the oxygen atoms of the silica network. 42 These copper ions are vital as MOF-199's metal nodes, formed by benzene-1,3,5-tricarboxylate (BTC) linker addition.…”

Organoselenium functionalized SBA-15 as a new catalyst for the cyanide-free conversion of oximes to nitriles

“…observed at 600–800 °C, which may be due to the re-adsorption of the combusted materials [ 40 ]. The estimated amount of grafted organoselenium compounds, which can be obtained by the residue of SBA-15 in the sample, is 1.23 mmol g −1 of inorganic mesoporous support.…”

A magnetic X-band frequency microwave nanoabsorbent made of iron oxide/halloysite nanostructures combined with polystyrene

“…This unique property exclusively belongs to the nanomaterials (below 50 nm), which are not able to form a double-domain magnetization state due to their tiny scale. [77][78][79] The results of saturation of magnetization in prepared Fe 3 O 4 / HNT-PS nanocomposite is displayed in Fig. 4.…”