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Pd(II)/Pd(0) Anchored on Magnetic Organic–Inorganic Hybrid Mesoporous Silica Nanoparticles: A Nanocatalyst for Suzuki–Miyaura and Heck–Mizoroki Coupling Reactions
Journal of Inorganic and Organometallic Polymers and Materials ( IF 4 ) Pub Date : 2021-06-14 , DOI: 10.1007/s10904-021-02045-7
Ameneh Ahmadi , Tahereh Sedaghat , Roya Azadi

3-Chloropropyltrimethoxysilane (CPTMS) was grafted on the surface of silica coated Fe3O4 core (Fe3O4@MCM-41) and then condensed with thiocarbohydrazide (TCH) to obtain Fe3O4@MCM-41-CPS-TCH. Then the heterogeneous Fe3O4@MCM-41-CPS-TCH-Pd nanocatalyst was synthesized by adding palladium(II) chloride to functionalized Fe3O4@MCM-41. The resultant nanomaterials were characterized using several techniques such as FT-IR, XRD, FE-SEM, HRTEM, EDS, BET, VSM, XPS, AAS and TGA. Then, the efficiency of this Palladium based magnetic nanocomposite was examined as catalyst for the preparation of biaryl derivatives using the Suzuki coupling of phenylboronic acid with various aryl halides in H2O/EtOH as a green solvent. The as-synthesized nanocomposite was also checked for the Heck–Mizoroki coupling reaction of various aryl halides and styrene. This catalytic system was easily retrieved by a magnetic field and reused for several times without distinct reduction in catalytic activity.



中文翻译:

Pd(II)/Pd(0) 锚定在磁性有机-无机杂化介孔二氧化硅纳米颗粒上:Suzuki-Miyaura 和 Heck-Mizoroki 偶联反应的纳米催化剂

3-氯丙基三甲氧基硅烷(CPTMS)接枝在二氧化硅包覆的Fe 3 O 4核(Fe 3 O 4 @MCM-41)的表面,然后与硫代碳酰肼(TCH)缩合得到Fe 3 O 4 @MCM-41-CPS-奇。然后通过将氯化钯 (II) 添加到功能化的 Fe 3 O 4 中合成了非均相 Fe 3 O 4 @MCM-41-CPS-TCH-Pd 纳米催化剂@MCM-41。使用多种技术对所得纳米材料进行表征,例如 FT-IR、XRD、FE-SEM、HRTEM、EDS、BET、VSM、XPS、AAS 和 TGA。然后,使用苯基硼酸与各种芳基卤化物在 H 2 O/EtOH 作为绿色溶剂中的 Suzuki 偶联,检测了这种钯基磁性纳米复合材料作为制备联芳基衍生物的催化剂的效率。还检查了合成的纳米复合材料的各种芳基卤化物和苯乙烯的 Heck-Mizoroki 偶联反应。这种催化系统很容易通过磁场回收并重复使用多次,催化活性没有明显降低。

更新日期:2021-06-14
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