Guest-induced growth of a surface-based supramolecular bilayer
Guest-induced growth of a surface-based supramolecular bilayer
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DOI：
10.1038/nchem.901
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发表时间：
2011-01-01
期刊：
影响因子：
21.8
通讯作者：
Beton, Peter H.
中科院分区：
文献类型：
--
作者：
Blunt, Matthew O.;Russell, James C.;Beton, Peter H.
平面分子在表面上的自组装可以导致形成各种各样的紧密堆积或多孔结构。二维多孔阵列提供用于捕获合适大小的客体物种的宿主位点。在这里，我们表明，一个非平面的客体物种（C-60）可以发挥更复杂的作用，通过促进第二层的主体分子（p-三联苯-3，5，3“，5”-四羧酸）的生长以上和平行于表面，使自组装扩展到第三维。客体分子的加入和第二层的形成是相互依赖的。添加平面客体（晕苯）可以取代C-60，并导致恢复到单层排列。该系统提供了一个平面和非平面超分子网络之间的可逆转换的一个例子，一个重要的一步功能，三维，基于表面的超分子结构的控制自组装。
Self-assembly of planar molecules on a surface can result in the formation of a wide variety of close-packed or porous structures. Two-dimensional porous arrays provide host sites for trapping guest species of suitable size. Here we show that a non-planar guest species (C-60) can play a more complex role by promoting the growth of a second layer of host molecules (p-terphenyl-3,5,3'', 5''-tetracarboxylic acid) above and parallel to the surface so that self-assembly is extended into the third dimension. The addition of guest molecules and the formation of the second layer are co-dependent. Adding a planar guest (coronene) can displace the C-60 and cause reversion to a monolayer arrangement. The system provides an example of a reversible transformation between a planar and a non-planar supramolecular network, an important step towards the controlled self-assembly of functional, three-dimensional, surface-based supramolecular architectures.