以Fe3 O4为核心,以IRMOF-3为壳层,采用层层包裹的方法制备了核-壳结构的磁性 Fe3 O4＠IR-MOF-3材料。用 X 射线衍射(XRD)、傅里叶变换红外光谱(FT-IR )、透射电镜(TEM )、及扫描电镜(SEM)等手段对材料进行表征,并考察了材料在 Kno-evenagel缩合反应中的催化反应性能。实验结果表明,Fe3 O4＠IRMOF-3材料呈现出 Fe3 O4和 IRMOF-3的双重功能,既可以磁性分离,又具有 IRMOF-3的晶体结构、孔结构和催化性能,在 Knoevenagel 缩合反应中表现出较好的催化活性、选择性和稳定性。
In this work,a novel kind of Fe3 O4@IRMOF-3 magnetic metal-organic framwork (MOF)has been successfully fabricated using a step-by-step assembly strategy.The structure and morphology of the as-prepared Fe3 O4@IRMOF-3 were systematically characterized and it was further investigated in the Knoevenagel conden-sation of benzaldehyde and ethylcynoacetate.The results indicated that the hybrid magnetic MOFs exhibit core-shell structure with Fe3 O4 as the core and IRMOF-3 as the shell.Furthermore,the amine-functionalized materi-al was active and selective as base catalysts in the Knoevenagel condensations.Remarkably,it can be recycled by magnetic seperation without significant loss of its catalytic performence.
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