Self-Assembly of Nanoparticles in a Modular Fashion to Prepare Multifunctional Catalysts for Cascade Reactions: From Simplicity to Complexity
Self-Assembly of Nanoparticles in a Modular Fashion to Prepare Multifunctional Catalysts for Cascade Reactions: From Simplicity to Complexity
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以模块化方式自组装纳米颗粒制备级联反应多功能催化剂：从简单到复杂
DOI：
10.1021/acsomega.8b03098
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发表时间：
2019
期刊：
影响因子：
4.1
通讯作者：
Liu Xin
中科院分区：
文献类型：
--
作者：
Li Danjie;Liu Lingmei;Zhang Lijing;Tao Shengyang;Li Guangtao;Yu Yongxian;Liu Xin
一锅级联反应可以简化合成路线，减少溶剂和能源的使用。多功能催化剂的制备是完成级联反应的关键。本研究开发了一种新颖、简单的方法，用于制备同时具有酸性、碱性和磁性的多功能催化剂。采用不同金属氧化物改性的介孔氧化硅材料作为催化元素。组装有催化组分的微球直径为150 μm，比表面积大于400 m2 g-1，可作为级联反应的催化剂。在脱缩醛-Knoevenagel反应中最终产物的产率为92%。与Fe 3 O 4纳米粒子集成的微球具有7.2 emu g-1的磁化率，可以很容易地从反应体系中除去，通过施加外部磁场。这种多模块的组装方法充分体现了由简单性产生的复杂性的巨大力量。该方法为其他多功能材料的制备提供了参考和实用的技术支持。
One-pot cascade reactions can simplify the synthetic route and reduce the use of solvents and energy. The critical part of the completion of the cascade reaction is the preparation of multifunctional catalysts. In this work, a novel and simple pathway was developed to construct multifunctional catalysts with acidic, basic, and magnetic properties at the same time. Mesoporous silica materials modified with different metal oxides were used as catalytic elements. Microspheres that assembled with catalytic components have a diameter of 150 μm and a specific surface area larger than 400 m2 g–1 and can be used as catalysts for cascade reactions. The yield of the final product in the deacetalization–Knoevenagel reaction is 92%. Microspheres integrated with Fe3O4 nanoparticles have a magnetic susceptibility of 7.2 emu g–1 and can be easily removed from the reaction system by applying an external magnetic field. This multimodule assembly method fully reflects the enormous power of complexity resulting from simplicity. This method provides a reference and practical technical support for the preparation of other multifunctional materials.