MoO_x–pyridine organic–inorganic hybrid wires as a reusable and highly selective catalyst for the oxidation of alcohols: a comparison study between reaction-controlled phase-transfer catalysis and heterogeneous catalysis

Abstract

The different catalytic behaviors of Mo3O10(C5H6N)2·H2O wires (MoOx–pyridine) in the selective oxidation of alcohols by means of molecular oxygen (O2) and hydrogen peroxide (H2O2) as green oxidants were investigated.

Easy Scale‐Up Synthesis of Mo8O26(C5H6N)4.H2O Hybrid with a Rectangular Prism Morphology and Its Application as an Efficient and Highly Recyclable Bi‐functional Catalyst for Knoevenagel Condensations

“…Interestingly, no considerable oxidation occurs in donor solvents like methanol and water (Table , entries 1 and 2), but 70% conversion could be achieved with dichloromethane and ethyl acetate as solvents after 6 hours of reaction under the same conditions (Table , entries 3 and 4). It appears that an acidic medium promotes the aerobic oxidation, as reported previously ,…”

“…Recently, hybrid materials have attracted considerable attention due to their unique properties and wide applications in sensing technology, optoelectronics, electromagnetics, and catalysis. [1][2][3][4][5][6][7][8] It is suggested that the incorporation of the inorganic and organic compounds into one, lead to the amalgamation of their properties and an enhancement of their performance. [9][10][11] In this context, easy scale up and convenient synthesis of the hybrid materials in mild conditions is highly regarded.…”

Scaled‐up, selective and green synthesis of sulfoxides under mild conditions using (CeIII‐MoVI)Ox/aniline hybrid rods as an efficient catalyst

“…Only at solvent free conditions, the oxidative system was performed via explosive and heat-release reaction. To show the importance of catalyst in this oxidative system, a similar reaction was also examined without (Ce III -Mo VI )O x /aniline rods ( 14) and it was revealed that 95% conversion with 90% selectivity towards sulfoxide was obtained after 30 minutes. To show the importance of catalyst in this oxidative system, a similar reaction was also examined without (Ce III -Mo VI )O x /aniline rods ( 14) and it was revealed that 95% conversion with 90% selectivity towards sulfoxide was obtained after 30 minutes.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Several kinds of these hybrids, e.g. [1,7,12,14] The selective oxidation of sulfides to sulfoxides is one of the fundamental reactions for the construction of various important compounds in both bulk and fine chemicals. The combination of organic and inorganic component's features along with structural anisotropy would lead to improve their functionalities and performances.…”

“…[18][19][20][21][22][23][24][25] Moreover, overoxidation of the sulfoxides to sulfones is a common problem during the oxidation of sulfides [26,27] that has garnered attention from the synthetic community. [12,14,[46][47][48][49] In recent years, owing to the redox properties of ceria, various types of ceria-based catalysts including cerium (IV) triflate, [50] ammonium cerium (IV) nitrate, [51] immobilized cerium alkyl phosphonate [52] and heterobimetallic cerium (IV) oxo clusters [53] are also widely used in selective oxidation of sulfides. From an economical and environmental viewpoint, an acceptable process involving hydrogen peroxide (H 2 O 2 ) as a terminal oxidant in the presence of a catalyst would be at particular interest, [28,29] since hydrogen peroxide produces water as by-product and it is worth mentioning that a controlled partial oxidation is also dramatically easier than the most of other oxidants.…”