Surface tectonics of nanoporous networks of melamine-capped molecular building blocks formed through interface Schiff-base reactions.
Surface tectonics of nanoporous networks of melamine-capped molecular building blocks formed through interface Schiff-base reactions.
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DOI：
10.1002/asia.201300546
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发表时间：
2013-10
期刊：
影响因子：
--
通讯作者：
Xuan Liu;Dong Wang;L. Wan
中科院分区：
文献类型：
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作者：
Xuan Liu;Dong Wang;L. Wan
控制分子在表面上的组装对于基于分子的微型器件的制造非常重要。三聚氰胺（MA）和带有末端MA单元的分子由于具有多个氢键位点而成为超分子界面堆积图案化的有希望的候选者。在这里，我们报告的形成自组装结构的MA封端分子通过一个简单的表面合成路线。通过MA与醛基之间的界面Schiff碱反应，成功地将MA端基组装到具有2重和3重对称性的刚性分子核上。亚分子扫描隧道显微镜（STM）成像的所得吸附层揭示了纳米多孔网络的形成。详细的结构分析表明，MA基团之间的强氢键相互作用持续驱动纳米多孔网络的形成。在这里，我们证明了具有强氢键形成能力的官能团是有前途的构建块的纳米多孔网络和其他层次的2D组件的引导组装。
Control over the assembly of molecules on a surface is of great importance for the fabrication of molecule-based miniature devices. Melamine (MA) and molecules with terminal MA units are promising candidates for supramolecular interfacial packing patterning, owing to their multiple hydrogen-bonding sites. Herein, we report the formation of self-assembled structures of MA-capped molecules through a simple on-surface synthetic route. MA terminal groups were successfully fabricated onto rigid molecular cores with 2-fold and 3-fold symmetry through interfacial Schiff-base reactions between MA and aldehyde groups. Sub-molecular scanning tunneling microscopy (STM) imaging of the resultant adlayer revealed the formation of nanoporous networks. Detailed structural analysis indicated that strong hydrogen-bonding interactions between the MA groups persistently drove the formation of nanoporous networks. Herein, we demonstrate that functional groups with strong hydrogen-bond-formation ability are promising building blocks for the guided assembly of nanoporous networks and other hierarchical 2D assemblies.