| 磁性Y-MOF@SiO2@Fe3O4催化剂的制备及其在Aza-Micheal加成反应中的性能 |
| Preparation and Properties for Aza-Micheal Addition Reaction of Magnetic Y-MOF@SiO2@Fe3O4 Catalysts |
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| 摘要: 在磁性SiO2@Fe3O4纳米微球表面原位合成包覆不同含量的Y-MOF，从而制备出新型磁性Y-MOF@SiO2@Fe3O4催化剂。采用XRD、TEM、FT-IR、VSM和N2吸附-脱附测试等手段对催化剂的结构进行表征，并且评价了催化剂对苯胺和丙烯酸甲酯的Aza-Micheal加成反应性能。结果表明Y-MOF能均匀包覆在磁性SiO2@Fe3O4纳米微球表面，形成具有核壳结构的磁性Y-MOF@SiO2@Fe3O4催化剂，催化剂具有良好的超顺磁性。Y-MOF含量为43.3%（w/w）的Y-MOF@SiO2@Fe3O4催化剂，在苯胺和丙烯酸甲酯的Aza-Micheal加成反应表现出最好的催化性能，丙烯酸甲酯的转化率为88.3%时，N-（β-甲氧碳酰乙基）苯胺的选择性可达99.8%。反应后的催化剂可以通过外磁场容易回收，并且重复使用5次其转化率和选择性没有明显下降。 |
| 关键词: 磁性 Y-MOF@SiO2@Fe3O4 催化剂 Aza-Micheal反应 |
| 基金项目: 国家自然科学基金（No.21573015，21173018）资助项目 |
| Abstract: The magnetic Y-MOF@SiO2@Fe3O4 catalysts with different Y-MOF contents were synthesized by encapsulating magnetic SiO2@Fe3O4 nanospheres into Y-MOF through an in-situ method. The structure of the catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), infrared spectroscopy (FT-IR), vibration sample magnetometer (VSM) and the N2 adsorption-desorption test. The performance of the catalyst for Aza-Micheal addition reaction with aniline and methyl acrylate was evaluated. The results showed that Y-MOF was uniformly coated on the surface of the SiO2@Fe3O4 nanospheres to form a core-shell magnetic Y-MOF@SiO2@Fe3O4 catalyst. The catalysts exhibited good superparamagnetism. When Y-MOF content was 43.3% (w/w), the Y-MOF@SiO2@Fe3O4 catalyst had better catalytic performance for the Aza-Micheal addition reaction. The conversion of methyl acrylate was 88.3% and the selectivity of N-(β-methoxycarbonylethyl) aniline was 99.8%. After reaction, the catalyst was recovered by magnetic recovery. It was reused five times, and still has high conversion and selectivity. |
| Keywords: magnetic Y-MOF@SiO2@Fe3O4 catalyst Aza-Micheal reaction |
| 投稿时间：2018-05-11 修订日期：2018-06-27 |
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| 穆金城,蒋赛,季生福.磁性Y-MOF@SiO2@Fe3O4催化剂的制备及其在Aza-Micheal加成反应中的性能[J].无机化学学报,2018,34(9):1753-1760. |
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