Heterogeneous synergistic catalysis by Ru-RuO x nanoparticles for Se–Se bond activation
nanoparticle, ruthenium, selenium, heterogeneous catalysis, synergistic effect
ABSTRACT The transition from homogeneous to heterogeneous synthetic chemistry enabled by nanocatalysts necessitates investigations of the reaction mechanism and structure-activity relationships for inorganic nanoparticles and organic substrates. Herein, we report that hydrothermally synthesized ruthenium nanoparticles performed differently in the Se–Se bond activation and selenylation of heterocycles, exhibiting a volcano-shaped relationship between catalytic activity and composition. A synergistic effect was observed for Ru-RuOx nanocatalysts, with numerous characterizations and density functional theory (DFT) calculations suggesting that a PhSeSePh molecule can initially be adsorbed on the metallic Ru sites and cleaved into two PhSe* species, which subsequently migrate to RuOx sites and react with the nucleophile to achieve the selenylation of heterocycles.
Tsinghua University Press
Mu Lin,Liqun Kang,Jun Gu,Linxiu Dai,Shengbo Tang,Tao Zhang,Yuhao Wang,Lindong Li,Xiaoyu Zheng,Wei Zhu,Rui Si,Xuefeng Fu,Lingdong Sun,Yawen Zhang,Chunhua Yan, Heterogeneous synergistic catalysis by Ru-RuO x nanoparticles for Se–Se bond activation. NanoRes.2017, 10(3): 922–932