Tuning the growth of metal-organic framework nanocrystals by using polyoxometalates as coordination modulators  

多酸阴离子对金属有机骨架纳米晶生长的调控（英文）

作　　者：徐晓斌 陆言 杨勇 Farhat Nosheen 王训 

机构地区：[1]Department of Chemistry, Tsinghua University

出　　处：《Science China Materials》2015年第5期370-377,共8页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21431003,91127040 and 21221062);the State Key Project of Fundamental Research for Nanoscience and Nanotechnology(2011CB932402)

摘　　要：Host-guest supramolecular interactions, which exist widely between diverse metal cations and polyoxometalate(POM) anions, have always been utilized to construct metal-organic frameworks(MOF) /POMs bulk composites. Actually, the interactions can also be found application in realizing shape-controlled synthesis of MOF nanocrystals(NCs). In this context, simply by introducing Keggin-type POMs into MOF precursors, various uniform [Cu3(BTC)2]n(BTC = benzene-1,3,5-tricarboxylate) NCs, including(truncated) octahedrons, hollow hierarchical spheres and octahedrons, are fabricated. Besides, such reaction system can be applied to construct noble metal@MOF nanocomposite, which significantly enhances the catalytic performance of the noble metal.在金属阳离子和多酸阴离子之间广泛存在着一种超分子相互作用,它经常被用来合成多酸基金属-有机骨架晶态材料.这种相互作用还可以用来调控金属-有机骨架材料的成核生长过程,从而实现其纳米晶体的可控制备.本文将Keggin型多酸阴离子引入到金属-有机骨架材料的前驱体溶液中作为调节剂,得到一系列形貌规则、尺寸均一的[Cu3(BTC)2]n(BTC=1,3,5-苯三甲酸)纳米晶,包括八面体、截角八面体、多级空心球、空心八面体等.此外,这种体系可以用于构建贵金属纳米晶@金属-有机骨架复合材料,其催化性质相对于单纯的贵金属纳米晶有较大提高.

关 键 词：纳米晶 Cu BTC 多酸阴离子 POMS 调控 调节控制 

分 类 号：TB33[一般工业技术—材料科学与工程] TB383.1