Crystal-to-crystal sliding of 2D coordination layers triggered by guest exchange
Crystal-to-crystal sliding of 2D coordination layers triggered by guest exchange
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DOI：
10.1002/1521-3773(20020916)41:18
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发表时间：
2002-01-01
影响因子：
16.6
通讯作者：
Fujita, M
中科院分区：
文献类型：
--
作者：
Biradha, K;Hongo, Y;Fujita, M
含有通道或空隙的金属有机骨架因其与沸石和粘土相似的功能特性而引起了当前的兴趣。[1±4]虽然孔隙率是金属有机骨架研究最多的特性之一，但对动态多孔配位网络的研究却很少。[5]二维网络材料有潜力提供这种动态多孔材料，因为它们可以适应层内或层间外部刺激引起的变化。在这里，我们在包含尺寸为 20 î 20 ä 的方形网格的 2D 网络晶体中提出了一种独特而新颖的动态过程。两种填充模式 A 和 B 之间的 2D 网络的晶体间滑动（图 1）是由客体交换触发的，并导致通道尺寸的显着增加。这种晶体到晶体的转变已通过转变前后的单晶和粉末 X 射线衍射研究得到证实。单晶
Metal±organic frameworks containing channels or voids have attracted current interest because of their functional properties, which are similar to those of zeolites and clays.[1±4] Although the porosity is one of the most studied properties of metal±organic frameworks, there are very few studies on dynamic porous coordination networks.[5] 2D-network materials have the potential to provide such dynamic porous materials as they can adopt changes caused by external stimuli, either within the layer or in between the layers. Here we present one such unique and novel dynamic process in the crystals of a 2D net containing square grids of dimension 20 î 20 ä.The crystal-to-crystal sliding of the 2D nets between two packing modesA and B (Figure1) is triggered by guest exchange, and results in considerable increase in the dimensions of channels. This crystal-to-crystal transformation was evidenced by single crystal and powder X-ray diffraction studies before and after the transformation. The single-crystal