Guest shape-responsive fitting of porous coordination polymer with shrinkable framework.
Guest shape-responsive fitting of porous coordination polymer with shrinkable framework.
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DOI：
10.1021/ja046925m
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发表时间：
2004-10
影响因子：
15
通讯作者：
R. Matsuda;R. Kitaura;S. Kitagawa;Y. Kubota;Tatsuo C. Kobayashi;S. Horike;M. Takata
中科院分区：
文献类型：
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作者：
R. Matsuda;R. Kitaura;S. Kitagawa;Y. Kubota;Tatsuo C. Kobayashi;S. Horike;M. Takata
测定了多孔性配位聚合物[[Cu(2)(Pzdc)(2)(Bpy)].G]的原位同步X射线粉末衍射谱(pzdc=吡嗪-2，3-二羧酸盐，bpy=4，4‘-联吡啶)(式中，CPL-2超组H(2)()O的G=H(2)O，CPL-2超组苯的G=苯，脱脂主体的G=空)。通过Rietveld分析确定了原基和CPL-2超组苯的结构。苯在孔道中的吸附引起晶体的显著收缩(b轴：6.8%，体积：4.9%)，尽管孔道被苯分子占据。这种晶型转变提供了一种适合苯分子的新的孔结构，我们将其称为“形状响应型拟合”转变。这种类型的孔产生了一种新的指导方针：框架可以由柔性基序组成，这些基序通过强键连接在一起，和/或刚性基序通过弱键连接在一起。
In situ synchrotron X-ray powder diffraction patterns of porous coordination polymers [[Cu(2)(pzdc)(2)(bpy)].G] have been measured (pzdc = pyrazine-2,3-dicarboxylate, bpy = 4,4'-bipyridine) (where G = H(2)O for CPL-2 superset H(2)()O, G = benzene for CPL-2 superset benzene, and G = void for the apohost). The structures of apohost and CPL-2 superset benzene were determined from Rietveld analysis. Adsorption of benzene in the channels induced a remarkable contraction in the crystal (b axis; 6.8%, volume; 4.9%), although the channels were occupied by the benzene molecules. This crystal transformation provides a new pore structure that is well suited for benzene molecules, and we denote it as a "shape-responsive fitting" transformation. This type of pore gives rise to a new guideline: frameworks can be composed of flexible motifs that are linked via strong bond and/or stiff motifs that are connected via weaker bonds.