Selective oxidation of aniline into azoxybenzene catalyzed by Nb-peroxo@iron oxides at room temperature

Abstract

Nb-peroxo@iron oxides show high selectivity and activity in aniline conversion to azoxybenzene.

Unraveling the Origin of Enhanced Activity of the Nb2O5/H2O2 System in the Elimination of Ciprofloxacin: Insights into the Role of Reactive Oxygen Species in Interface Processes

“…For the preparation of the niobia sample treated with concentrated hydrogen peroxide (sample with ROS formed ex situ on the surface of Nb 2 O 5 ), 100 mg of powdered niobium pentoxide was spread inside a glass bottle in the form of a thin layer. Next, 500 μL of hydrogen peroxide (25…”

“…As a result, such a surface must ensure the specific conditions necessary for the mutual and effective performance of both processes. Among ROS, hydroxyl radicals − and superoxide anion radicals show high activity in complete oxidation processes, while in the case of selective oxidation processes peroxo surface forms are very often indicated. − However, in addition to their chemical reactivity, charged ROS may influence the surface properties of catalysts and thus their ability to adsorb organic compounds. This, in turn, may have a significant impact on the efficiency of the degradation process because the adsorption of a pollutant is usually not only the first stage of its degradation but also constitutes a rate-limiting step of the entire process.…”

Ionic Liquid-Regulated Titanium Oxo Clusters Catalyze Selective Oxidation of Anilines to Azoxybenzenes

“…Oxidation reactions are important in scientific research and the chemical industry . Aromatic amines can be selectively oxidized into many valuable oxygenated products such as aromatic nitro, nitroso, hydroxylamine, azo, and azoxy compounds, which have attracted growing attention in recent decades. − Because of the application of dyes, inhibitors, and chemical stabilizers and reductants in large-scale industries and laboratories, the selective catalytic oxidation of aromatic amines to azoxy compounds is of great significance in synthesis. , Additionally, azoxy compounds with special substituents can be used as liquid crystals in electronic displays and pharmaceuticals. Therefore, developing a cost-effective and efficient method to synthesize azoxy compounds under green, mild reaction conditions is of great importance.…”

Not So Similar: Different Ways of Nb(V) and Ta(V) Catecholate Complexation

“…Compared to POM chemistry, there are two relatively small branches of group 5 chemistry dealing with non-organometallic mononuclear M(V) complexes: (i) peroxocomplexes and (ii) [MOL 3 ] n− coordination compounds with selected organic ligands. These complexes are of potential interest as catalysts for organic oxidation reactions [14][15][16][17][18]. The [MOL 3 ] n− are mostly represented by oxalate complexes studied by Planinic, Juric et al [19][20][21][22].…”