科研之友
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摘要
Herein, we reported a facile and readily accessible visible-light-drivenphotocatalytic protocol to induce oxidative cleavage of C Cbonds to corresponding carbonyls using CsPbBr3 nanocrystalsas photocatalysts. This catalytic system was applicable to a widerange of terminal and internal alkenes. Detailed mechanism studiesindicated that a single-electron transfer (SET) process was involvedin this transformation, wherein the superoxide radical (O-2 (& BULL;-)) and photogenerated holes played crucialroles. Additionally, DFT calculations revealed that the reaction wasinitiated by the addition of O-2 (& BULL;-) to the terminal carbon atom of the C C bond and completedby releasing one molecular formaldehyde by the formed [2 + 2] intermediate;the latter conversion was a rate-determining process.
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