Sulfonylation reactions photocatalyzed by quantum dots: rule of band-position and surface chemistry

Abstract

An environmentally friendly methodology for the synthesis of different functionalized sulfones is described here. Quantum dots (QDs) of cysteamine (Cys) or 3-mercaptopropionic acid (MPA) capped cadmium chalcogenides (CdY, Y =...

Concepts behind the Redox Photocatalysis with Quantum Dots

“…Here, the excited electron acts as the reductor agent and the hole as the oxidant agent [16] . Some well‐known organic reactions have been carried out by using nanosystems as catalysts, such as Suzuki coupling reaction (Pd 3 P/CdS), [17] oxidation of benzylic alcohols (CdS), [18] oxidative amidation of aldehydes, [19] sulfonamidation, [20] and sulfonylation [21] . In this review, some specific properties of the QDs are highlighted to a better understanding of the photocatalyst mechanism of these nanoparticles.…”

“…The photoredox process occurs simultaneously, as described in the CdSe photocatalyzed sulfonylation reaction, starting from organohalogens (reduction) and sodium p ‐toluenesulfinate (oxidation) [21] . Otherwise, specific reduction reactions should be carried out by using a sacrificial electron donor, [38] as described in the CdS photocatalytic conversion of nitrobenzene to aniline, where 3‐mercaptopropionic acid was used as a scavenger [39] .…”