Selective epoxidation of olefins catalyzed by oxodiperoxomolybdenum(VI) complexes immobilized over highly ordered 2D-hexagonal mesoporous silica

Silver nanoparticle (AgNPs) doped gum acacia–gelatin–silica nanohybrid: An effective support for diastase immobilization

“…Average size of the pore for the nanohybrid is 3.0 nm and this is large enough to overcome the diffusion limitation of the porous gel. BET of H 3 -Enz indicated negative adsorption (isotherm not shown) indicating, no available void space for the N 2 molecules to get adsorbed at the pore surface [46,47] of H 3 -Enz.…”

Recent Progress in the Heterogenization of Complexes for Single‐Site Epoxidation Catalysis

“…They reported the immobilization of oxidodiperoxo(8-quinolinol)molybdenum(VI) complexes in MCM-41 without the usage of a linker. [40] Two different compounds were screened: the neutral complex MoO(O 2 ) 2 (QOH) 2 (QOH = 8-quinolinol) and an anionic oxidodiperoxo-8-quinolinolatomolybdate(VI) system. The immobilized catalysts showed excellent catalytic activities and recycling abilities (six times), much better than their homogeneous counterparts.…”

“…Furthermore, this catalyst can easily be recovered by filtration and reused at least three times without loss of catalytic activity and selectivity. In a subsequent work by the same group, an analogous strategy was used to immobilize the polyoxometalate anion [γ-1,2-H 2 SiV 2 W 10 O 40 ] 4-on a silica support. [62] The resultant catalyst is capable to heterogeneously oxidize a broad range of olefins and sulfides with high selectivity at room temperature.…”

Efficient liquid phase oxidation of olefins and aromatic alcohol catalyzed by reusable polymer anchored Schiff base complexes

“…Cyclohexene was oxidized in the presence of molecular oxygen under mild conditions giving good selectivity for epoxide (Table 1, Entry 3). In the presence of H 2 O 2 , allylic oxidation product like 2-cyclohexene-1-ol and 2-cyclohexene-1-one are the main products, which may be due to homolytic cleavage of peroxide 53 in the presence of iron catalyst leading to allylic oxidation product.…”