Ultrasmall CsPbBr Nanocrystals as a Recyclable Heterogeneous Photocatalyst in 100% - and Anti-Markovnikov Sulfinylsulfonation of Terminal Alkynes.

The precise synthesis of ultrasmall, monodisperse CsPbBr nanocrystals is crucial due to their enhanced photophysical properties resulting from strong quantum confinement effects. Traditional methods struggle with size control, complicating synthesis. Although CsPbBr nanocrystals find applications in LEDs and photovoltaics, their use in photocatalysis for organic reactions remains limited.

Mimicking Ozonolysis via Mechanochemistry: Internal Alkynes to 1,2-Diketones using HIO.

Utilizing periodic acid as an environmentally benign oxidizing agent, this study introduces a novel mechanochemical method that mimics ozonolysis to convert internal alkynes into 1,2-diketones, showcasing effective emulation of ozone's reactivity. Notably, this oxidation occurs at room temperature in aerobic conditions, eliminating the need for toxic transition metals, hazardous oxidants, or expensive solvents. Through control experiments validating the mechanism, substantial evidence supports a concerted reaction pathway.