Selective and efficient catalytic and photocatalytic oxidation of diphenyl sulphide to sulfoxide and sulfone: the role of hydrogen peroxide and TiO₂ polymorph

Abstract

Selective sulfoxide and sulfone production can be precisely controlled by choosing TiO2 polymorph and the reaction mode (catalysis versus photocatalysis).

A Mesoporous CuO/CuSe Heterojunction Nanocomposite with Applications in Visible‐Light Photocatalysis and as an Electrochemical Phenol Sensor

“…With increasing the concentration of H 2 O 2 the rate constant also increases owing to the enhanced number of charge carriers. One of the superior properties of H 2 O 2 i.e., electron accepting property leads to the generation of sufficient amount of hydroxyl radicals [54] . Hence, improved photocatalytic activity of the synthesized samples was achieved in presence of H 2 O 2 .…”

“…One of the superior properties of H 2 O 2 i.e., electron accepting property leads to the generation of sufficient amount of hydroxyl radicals. [54] Hence, improved photocatalytic activity of the synthesized samples was achieved in presence of H 2 O 2 . Therefore, dye removal efficiency gradually increases with increasing the concentration of H 2 O 2 from 0.5 mM to 2 mM strength at a fixed photocatalyst dosage in case of both the dyes.…”

Recent Advances in Visible‐Light‐Driven C−S Bond Formation

“…Csp 3 À S bond formation. In 2020, Dilman and coworkers developed a visible light, Ir(ppy) 3 photoredox catalyzed 1,2-difunctionalization of alkenes (15.1, Scheme 15) and fluoroalkyl tetrafluoropyridinyl sulfides 15.2, affording a range of difluoromethylated sulfides 15.3 in good yields also in gram scale.…”

“…Csp 3 À S bond formation. The difunctionalization of alkenes has been recognized as efficient strategy for the construction of structurally complex molecules.…”

“…As well evidenced by the historical example of penicillins, natural and artificial organic sulfides (some of them described in Figure 1) have found applications in, among the others, agrochemistry [1] and pharmaceutical industries [2] . Furthermore, such derivatives can be smoothly converted under photo and biocatalytic conditions to derivatives with higher oxidation state sulfur moieties such as sulfoxides [3] and sulfones [4] . Apart from the synthetic application, the thiolation reactions (and in particular of thiol‐ene processes) have been also exploited in polymer chemistry [5] …”