核-壳型磁性金属有机骨架材料Fe_3O_4@IRMOF-3的合成、表征及其催化反应研究  

Preparation and characterization of magnetic IRMOF-3 with core-shell structure and its catalytic performance in knoevenagel condensations

作　　者：李晓芳[1] 张艳梅[2] 田苗苗[1] 储刚[1] 张静[1] 范圣第[2] 王剑锋[2] 

机构地区：[1]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001 [2]大连民族学院生命科学学院,辽宁大连116605

出　　处：《功能材料》2015年第6期6039-6043,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21203017);国家重点实验室开放基金资助项目(N-11-03);中央高校基本研究业务费专项资金资助项目(DC13010311)

摘　　要：以Fe3O4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Fe3O4@IRMOF-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Knoevenagel缩合反应中的催化反应性能。实验结果表明,Fe3O4@IRMOF-3材料呈现出Fe3O4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 Fe3O4@ 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 Fe3O4@ IRMOF-3 were systematically characterized and it was further investigated in the Knoevenagel condensation of benzaldehyde and ethylcynoacetate. The results indicated that the hybrid magnetic MOFs exhibit core-shell structure with Fe3O4 as the core and IRMOF-3 as the shell. Furthermore,the amine-functionalized material 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.

关 键 词：金属有机骨架材料 FE3O4 IRMOF-3 KnoGevenagel缩合反应 稳定性 

分 类 号：TB332[一般工业技术—材料科学与工程]