N-heterocyclic carbene-stabilized metal nanoparticles within porous organic cages for catalytic application

作者：Tong Liu, Sha Bai, Le Zhang, F. Ekkehardt Hahn, Ying‐Feng Han · 发表于：National Science Review · 年份：2022 · DOI：10.1093/nsr/nwac067 · 被引用次数：55 · 研究领域：N-Heterocyclic Carbenes in Organic and Inorganic Chemistry、Catalytic Cross-Coupling Reactions、Covalent Organic Framework Applications

Abstract Tuning the surface-embellishing ligands of metal nanoparticles (NPs) is a powerful strategy to modulate their morphology and surface electronic and functional features, impacting their catalytic activity and selectivity. In this work, we report the design and synthesis of a polytriazolium organic cage PIC-T, capable of stabilizing PdNPs within its discrete cavity. The obtained material (denoted Pd@PCC-T) is highly durable and monodispersed with narrow particle-size distribution of 2.06 ± 0.02 nm, exhibiting excellent catalytic performance and recyclability in the Sonogashira coupling and tandem reaction to synthesize benzofuran derivatives. Further investigation indicates that the modulation of N-heterocyclic carbene sites embedded in the organic cage has an impact on NPs’ catalytic efficiency, thus providing a novel methodology to design superior NP catalysts.