Strongly coupled Mn₃O₄–porous organic polymer hybrid: a robust, durable and potential nanocatalyst for alcohol oxidation reactions

Abstract

Porous organic polymer encapsulated Mn3O4 nanoneedles exhibited catalytic activity in the oxidation of diverse alcohols with tremendous recyclability.

Palladium Nanoparticles Encaged in a Nitrogen‐Rich Porous Organic Polymer: Constructing a Promising Robust Nanoarchitecture for Catalytic Biofuel Upgrading

“…In contrast with MOFs, N‐doped carbon, carbon nanotubes, and porous organic polymers (POPs) have gained an incredible degree of interest as fascinating candidates for the spatial confinement of catalytically active crystalline metal or metal oxide nanoparticles owing to their interconnected three‐dimensional highly rigid symmetric skeletons, which are mechanically stable to heat, moisture, acid, and base, along with their designable pore structure, low skeleton density, and easily tunable structural integrity through changing the straightforward and effective synthesis strategy and selection of monomers . Very recently, POP‐supported metal or metal oxide nanoparticles have become very attractive candidates as heterogeneous nanocatalysts in performing hydrogenation, oxidation, and photocatalytic reactions ,. A certain degree of chemical interaction, including coordination and electron transfer between the polymers and metal NPs, can surely enhance the catalytic activity and stability of metal NPs, thereby evading agglomeration and leaching from the POP networks.…”

Efficient and Highly Selective Solvent‐Free Oxidation of Primary Alcohols to Aldehydes Using Bucky Nanodiamond

“…Moreover, reasonable catalytic activity for the oxidation of unsaturated alcohols, such as cinnamic alcohol and 4‐cyanobenzyl alcohol, could be achieved (Table , entries 7 and 8). The selectivity for cinnamyl aldehyde (81.8 %) was higher than that obtained with a reported transition‐metal catalyst . Moreover, the conversion of cinnamic alcohol was further improved to 72.4 % along with a decent selectivity by prolonging the reaction time (Table , entry 7).…”

“…[e] Ref. , 1.5 mmol substrate, 20 mg Mn 3 O 4 /porous organic polymers as catalyst, 10 mL CH 3 CN, 3 mmol TBHP, 80 °C, 8 h. [f] Ref. , n (substrate)/(cat)=50, n (TBHP)/(substrate)=2, [Fe(bipy) 3 ](OTf) 2 as catalyst, 25 °C, 24 h. [g] The reaction conditions are the same as stated in footnote a, except the catalyst used was 5 wt % Pt/C.…”

Tuning the Synthesis of Manganese Oxides Nanoparticles for Efficient Oxidation of Benzyl Alcohol

“…S1 and S2-600 with mainly crystalline Mn 2 O 3 could contain the dominant lattice oxygen O 2− , surface O − , or β-oxygen species on the surface for the relatively lower activity in the oxidation. It was proposed that Mn 3 O 4 with coexistence of a mix-valence state such as Mn 2 O 3 can create defects in the materials and contribute unique and more activity in certain redox reactions [19, 34, 35]. The defects promoted the adsorption of the oxygen as indicated by O 2 -TPD, which would enhance the catalytic activity.…”

“…The noble metal-based catalysts, though highly active for the oxidation of benzyl alcohol, generally suffer from the sintering of surface noble metal particles and high price as well as a low reserve on earth [18]. Although some advancement has been made in the catalytic oxidation of benzyl alcohols over noble metal catalyst, there are only limited literature reports on non-noble metal catalysts, like transition metals or transition metal oxides especially manganese oxides [19]. From the viewpoint of green economy and environmental demand, it is highly attractive to develop new and cost-effective catalysts using non-precious metals or metal oxides such as nickel [20], vanadium [21], copper [3], and manganese [19] that can allow more efficient aerobic oxidation of benzyl alcohol under mild conditions [14].…”