Phosphotungstic acid supported on magnetic nanoparticles as an efficient reusable catalyst for epoxidation of alkenes

Cobalt salophen complex supported on magnetic nanoparticles as an efficient reusable catalyst for oxidation of benzylic alcohols

“…In the first step, imidazole functionalized silica coated magnetic nanoparticles (imid-Si@ Si-MNPs) were achieved by using the previously reported method 23 .…”

Phosphotungstic Acid Supported on Magnetic Nanoparticle Used As Selective and Reusable Photocatalyst for Aerobic Oxidation of Benzylic Alcohols

“…A possible method is immobilizing POMs species in the surface of magnetic particles which can be separated and recovered from the reaction system by applying an appropriate magnetic field [15][16][17][18][19][20][21][22][23][24][25] . Moreover compared to conventional supported POMs photocatalysts, the nanometer sizes of the magnetic photocatalyst provide a larger surface area, which subsequently enables higher efficiency in photo-catalytic reactions.…”

Selective oxidation of sulfides and hydrocarbons with H$_{2}$O$_{2}$ over manganese catalyst supported on nanoparticles

“…2 Moreover, MNPs are good supports for immobilization of homogeneous catalysts. 3 Therefore, catalytic systems with MNP supports have been successfully utilized in catalyzing a broad series of chemical reactions such as oxidation 4 and polymerization.…”

“…12,13 One of the major advantages of a catalytic system anchored in MNPs is that they can be well isolated by a simple magnetic separation procedure. However, MNPs have a tendency to aggregate in liquid media owing to their magnetic dipole-dipole interaction, 3 and so their surface area and magnetism may be decreased. Therefore, coating with a thin layer of silica has been used to stabilize bare MNPs to avoid their agglomeration in solutions.…”

“…Therefore, coating with a thin layer of silica has been used to stabilize bare MNPs to avoid their agglomeration in solutions. 3 Silica is one of the best materials for coating of MNPs because of its high chemical stability and easy functionalization. 14−16 There are numerous reports on the preparation and applications of silica-coated MNPs.…”