One-Pot Multistep Cascade Reactions over Multifunctional Nanocomposites with Pd Nanoparticles Supported on Amine-Modified Mesoporous Silica
作者:Ping Li、Hua Liu、Yu Yu、Chang-Yan Cao、Wei-Guo Song
DOI:10.1002/asia.201300514
日期:2013.10
kinds of multifunctional nanocomposites, SBA‐15‐NH2/Pd‐p and SBA‐15‐NH2/Pd‐f, with platelet‐like and fiber‐like morphologies, respectively, were fabricated by immobilizing Pd NPs onto amine‐functionalized SBA‐15. Some of the amino groups acted as anchoring sites for Pd NPs, whilst the remaining groups acted as Brønsted basic sites. As a result, the composites served as excellent multifunctional heterogeneous
通过将Pd NPs固定在胺官能化的表面上,制备了两种具有纳米片状和纤维状形态的多功能纳米复合材料SBA-15-NH 2 / Pd-p和SBA-15-NH 2 / Pd-f。 SBA-15。一些氨基充当Pd NP的锚定位点,而其余的基团充当Brønsted碱性位点。结果,该复合材料可作为一锅多步级联反应序列的出色的多功能异相催化剂。此外,当扩散是决定速度的步骤时,中孔较小的SBA-15-NH 2 / Pd-p优于纤维样对照样品,这是由于其扩散长度短,孔堵塞的可能性较低,以及催化过程中反应物种的更好质量传输。