Palladium supported on phosphinite functionalized Fe3O4 nanoparticles as a new magnetically separable catalyst for Suzuki–Miyaura coupling reactions in aqueous media
Palladium supported on phosphinite functionalized Fe3O4 nanoparticles as a new magnetically separable catalyst for Suzuki–Miyaura coupling reactions in aqueous media
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DOI：
10.1039/c5cy00821b
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发表时间：
2016-05
影响因子：
5
通讯作者：
M. Gholinejad;M. Razeghi;A. Ghaderi;P. Biji
中科院分区：
文献类型：
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作者：
M. Gholinejad;M. Razeghi;A. Ghaderi;P. Biji
新型次膦酸酯功能化的磁性（Fe 3 O 4）纳米粒子具有含有咪唑离子液体部分的二氧化硅纳米壳已成功合成，并用作钯纳米粒子的载体和稳定剂。通过SEM、TEM、EDX、固体UV、VSM、XRD、XPS、FT-IR和N2吸附-脱附等手段对产物进行了表征。该磁性复合物已被应用于在温和的反应条件和低钯负载量下，在水介质中的芳基卤化物（I，Br，Cl）与芳基硼酸的Suzuki-Miyaura偶联反应的催化剂。空气稳定的催化剂可以很容易地使用外部磁铁从反应混合物中分离出来，并连续重复使用8次，其催化活性略有下降。
Novel phosphinite functionalized magnetic (Fe3O4) nanoparticles having silica nanoshells containing an imidazolium ionic liquid moiety have been successfully synthesized and used as a support and stabilizer for palladium nanoparticles. The obtained compound was characterized by SEM, TEM, EDX, solid UV, VSM, XRD, XPS, FT-IR, and N2 adsorption–desorption analyses. This magnetic composite has been applied as the catalyst in the Suzuki–Miyaura coupling reaction of aryl halides (I, Br, Cl) with arylboronic acids in aqueous media under mild reaction conditions and low palladium loading. The air stable catalyst could be easily separated from the reaction mixture using an external magnet and reused eight consecutive times with small drops in its catalytic activity.