Magnetic nanoparticles modified by polyamidoamine-immobilized TEMPO for catalytic oxidation of monomethoxy poly (ethylene glycol)

Enzyme-inspired dry-powder polymeric catalyst for green and fast pharmaceutical manufacturing processes

“…Other examples include environmentfriendly and low-cost imprinted magnetic nano-catalyst for degradation of polluting dyes [13] and MIP-layered TiO 2 -functionalized particles, produced by a hydrothermal method, which improve the catalytic degradation of non-functionalized TiO 2 particles by 30% [14]. Other strategies have been proposed, with the aim of creating catalytic scaffolds, but involving non-selective catalytic processes, such as radical species immobilized on non-specific polymers [15], silica [16], carbon nanotubes [17], ionic liquids [18], deep eutectic solvents [19] or magnetic particles [20].…”

Oxidative Desulfurization Activity of NIT Nitroxide Radical Modified Metallophthalocyanine

“…Studies have shown that the nitroxide radicals exist in three forms: nitroxide radical, hydroxylamine and oxoammonium cations both in TEMPO and NIT, and that the redox conversion can be achieved between the three forms by gaining and losing electrons [24,25] (Figure 1b). In 1965, Golvbev found that TEMPO could be used to selectively oxidize primary alcohols to aldehydes [26], which indicated TEMPO had strong selectivity and catalytic oxidation, leading to its wide use in the field of catalytic oxidation [27,28]. For instance, TEMPO has been applied in desulfonylative α-oxyamination reactions of α-sulfonylketones [29] and fast-response electroactive actuators based on TEMPO-oxidized cellulose nanofibers [30].…”