Wang Xue, Guan Buyuan, He Yapeng, An Dong, Zhang Ye, Cao Yu, Li Xiang, Liu Yunling, Huo Qisheng
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
Nanoscale. 2015 Feb 28;7(8):3719-25. doi: 10.1039/c4nr06341d.
Megranate-like nanoparticles possess a unique structure that is composed of multiple cores and shells, which is different from simple yolk-shell nanoparticles. Megranate-like nanoparticles can combine the properties of each component and be used as nanoreactors. This study describes the preparation of bifunctional megranate-like nanoreactors, consisting of multiple metal cores and thiol modified mesoporous SiO2 shells. Different metal nanoparticles (Pd, Pt, Au) can be incorporated into the structure as cores, and the thiol group in the shells can be oxidized to acidic -SO3H. The megranate-like nanoparticles show good bifunctional catalytic properties and recyclability in a cascade catalytic reaction for the desired benzimidazole derivative. Moreover, the individual components of the megranate-like nanoparticles also show good catalytic activities in the hydrogenation reduction of nitro-aromatics and the deprotection reaction of benzaldehyde dimethyl acetal.
石榴状纳米颗粒具有独特的结构，由多个核和壳组成，这与简单的蛋黄壳纳米颗粒不同。石榴状纳米颗粒可以结合各组分的特性，并用作纳米反应器。本研究描述了由多个金属核和硫醇修饰的介孔二氧化硅壳组成的双功能石榴状纳米反应器的制备。不同的金属纳米颗粒（钯、铂、金）可以作为核掺入结构中，壳中的硫醇基团可以氧化成酸性的-SO₃H。石榴状纳米颗粒在所需苯并咪唑衍生物的级联催化反应中表现出良好的双功能催化性能和可回收性。此外，石榴状纳米颗粒的各个组分在硝基芳烃的氢化还原和苯甲醛二甲醇缩醛的脱保护反应中也表现出良好的催化活性。
