Liu Tong, Bai Sha, Zhang Le, Hahn F Ekkehardt, Han Ying-Feng
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
Natl Sci Rev. 2022 Apr 5;9(6):nwac067. doi: 10.1093/nsr/nwac067. eCollection 2022 Jun.
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-, capable of stabilizing PdNPs within its discrete cavity. The obtained material (denoted Pd@PCC-) 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.
调整金属纳米颗粒（NPs）的表面修饰配体是调节其形态、表面电子和功能特性的有力策略，这会影响它们的催化活性和选择性。在这项工作中，我们报告了一种聚三唑鎓有机笼PIC-的设计与合成，它能够在其离散腔内稳定钯纳米颗粒。所得到的材料（表示为Pd@PCC-）高度耐用且单分散，粒径分布狭窄，为2.06±0.02纳米，在合成苯并呋喃衍生物的Sonogashira偶联和串联反应中表现出优异的催化性能和可回收性。进一步研究表明，嵌入有机笼中的N-杂环卡宾位点的调节对纳米颗粒的催化效率有影响，从而提供了一种设计优质纳米颗粒催化剂的新方法。
