Porous organic cages
Porous organic cages
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DOI：
10.1038/nmat2545
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发表时间：
2009-12-01
期刊：
影响因子：
41.2
通讯作者：
Cooper, Andrew I.
中科院分区：
文献类型：
--
作者：
Tozawa, Tomokazu;Jones, James T. A.;Cooper, Andrew I.
多孔材料在包括分子分离和催化的广泛应用中是重要的。我们证明了共价键合的有机笼可以组装成结晶微孔材料。多孔性是预制的并且是分子笼结构固有的，而不是通过非多孔亚单元的非共价自组装形成的。通过改变化学功能来控制融合器窗口之间的三维连通性，从而可以生产无孔或永久多孔组件。后者的表面积和气体吸收量超过可比的分子固体。其中一个笼可以通过重结晶转化为多孔或无孔多晶型物，表观Brunauer-Emmett-Teller表面积分别为550和23 m2 g-1。这些结果表明，响应多孔有机固体和预制分子孔的扩展材料的模块化建设的设计原则。
Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of non-porous sub-units. The three-dimensional connectivity between the cage windows is controlled by varying the chemical functionality such that either non-porous or permanently porous assemblies can be produced. Surface areas and gas uptakes for the latter exceed comparable molecular solids. One of the cages can be converted by recrystallization to produce either porous or non-porous polymorphs with apparent Brunauer-Emmett-Teller surface areas of 550 and 23 m(2) g(-1), respectively. These results suggest design principles for responsive porous organic solids and for the modular construction of extended materials from prefabricated molecular pores.