Generation of hydrogen peroxide and hydroxyl radical resulting from oxygen-dependent oxidation of l-ascorbic acid via copper redox-catalyzed reactions

Abstract

The generation of hydrogen peroxide (H2O2) and hydroxyl radical (HO˙) during the oxidation of l-ascorbic acid (l-AA) by oxygen with copper as a catalyst.

Copper(i)-mediated synthesis of β-hydroxysulfones from styrenes and sulfonylhydrazides: an electrochemical mechanistic study

“…On the basis of the obtained experimental data and previous studies of reactions proceeding through the generation of Scentered radicals from sulfonylhydrazides, [33][34][35] we proposed the pathway of the oxysulfonylation process (Scheme 4). Cu(I) ions are oxidized to Cu(II) [36][37][38][39][40] in the presence of oxygen, as conrmed by numerous kinetic studies of this process. [41][42][43][44] An almost colourless solution during the reaction is evidence for a small amount of Cu(II).…”

Facile Photoinduced Generation of Hydroxyl Radical on a Nitrocellulose Membrane Surface and its Application in the Degradation of Organic Pollutants

“…[14] In the field of wastewater treatment, the availablem ethods fort he generation of hydroxyl radicals are often limited by their high cost and the large number of competing scavengers present in wastewater. For example, superoxide anion radicals (O 2 À C)h ave often been found to hindera ssessment of the interaction between biomolecules and hydroxyl radicals generated through Fenton-like reactions.…”

“…For example, superoxide anion radicals (O 2 À C)h ave often been found to hindera ssessment of the interaction between biomolecules and hydroxyl radicals generated through Fenton-like reactions. [14] In the field of wastewater treatment, the availablem ethods fort he generation of hydroxyl radicals are often limited by their high cost and the large number of competing scavengers present in wastewater. [15] Therefore, as imple, clean, and efficient method for generating this radical would greatlyc oncern research involvingt hese processes, as well as their industrial application.…”

Cu-doped zeolitic imidazolate framework catalysed highly selective conversion of alkynes to $$\upbeta $$ β -keto and vinyl sulfones using sodium sulfinates

“…A plausible reaction mechanism for oxysulfonylation and hydrosulfonylation from these results and relevant literature [29][30][31][32][33][34][35][36][37][38] is illustrated in Scheme 2. In the first step, sodium p-toluene sulfinate is oxidized in the presence of Cu(II) catalyst and sulfonyl radical A is generated, which reacts with an alkyne to give a radical intermediate B.…”