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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Guest shape-responsive fitting of porous coordination polymer with shrinkable framework.

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.[1]

References

  1. Guest shape-responsive fitting of porous coordination polymer with shrinkable framework. Matsuda, R., Kitaura, R., Kitagawa, S., Kubota, Y., Kobayashi, T.C., Horike, S., Takata, M. J. Am. Chem. Soc. (2004) [Pubmed]
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