Design and development of a novel magnetic camphor nanospheres core/shell nanostructure

Abstract

In this work, the first synthesis, characterization and catalytic performance of Fe 3 O 4 /camphor core/shell nanospheres as a magnetic composite nanocatalyst were reported. The characterization was carried out by Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, vibrating sample magnetometer, N 2 adsorption-desorption by Brunauer-Emmett-Teller and inductively coupled plasma analyses. The recoverable heterogeneous nanostructure catalyst was simply prepared and effectively employed in the one-pot multicomponent synthesis of b-amino carbonyl compounds in ethanol as a green solvent at room temperature. Further advantages of this new protocol are short reaction times, high yields, easy workup procedure, inexpensive and eco-friendly protocol and magnetically recoverability and several times reusability of the nanocatalyst without significant decrease in catalytic activity.

Surface functionalization of magnetic nanoparticles via palladium‐catalyzed Diels‐Alder approach

“…Figure also shows the XRD pattern of Fe 3 O 4 NPs according to the database of JCPDS No. 19–0629 . As the figure, the peaks which were appeared at 18.73°, 30.72°, 36.22°, 43.83°, 54.00°, 57.73°, and 63.43° for both patterns 7 b and 7 d , are corresponded with Fe 3 O 4 NPs diffraction pattern.…”

Green synthesis of polyhydroquinolines via MCR using Fe3O4/SiO2-OSO3H nanostructure catalyst and prediction of their pharmacological and biological activities by PASS

“…Our group previous works have been on preparation and application of nanostructure heterogeneous catalysts in chemical reactions, especially MCRs [16][17][18][19][20][21][22][23]; in this article, we want to describe the practical synthesis and theoretical prediction of the pharmacological and biological activities of polyhydroquinoline derivatives 4-37. In this purpose, sulfonated silica-based magnetic nanocatalyst (Fe 3 O 4 /SiO 2 -OSO 3 H) was used as a green heterogeneous nanocatalyst in a one-pot MCR starting from diverse aromatic and heteroaromatic aldehyde 1, dimedone/cyclohexandione 2, ethyl-or methyl-acetoacetate 3 and NH 4 OAc.…”