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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Shape-persistent macrocyclic aromatic tetrasulfonamides: Molecules with nanosized cavities and their nanotubular assemblies in solid state
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Shape-persistent macrocyclic aromatic tetrasulfonamides: Molecules with nanosized cavities and their nanotubular assemblies in solid state

机译：形状持久的大环芳族四磺酰胺：具有纳米孔的分子及其固态的纳米管组装体

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摘要

Alkoxy side-chain-flanked diarylsulfonamide serves as a reliable structural motif for constructing macrocyclic aromatic tetrasulfon-amides. This 90 degrees structural motif is persistent both in solution and in the solid state, which allows the one-step formation of tetrasulfonamide macrocycles. These macrocycles adopt a cone-shaped conformation in solution and in the solid state. For each molecule, an interior cavity surrounded by the aromatic residues is formed. The cavity sizes of the macrocycles can be tuned by incorporating aromatic residues of proper sizes. Guest (solvent) molecules are found in the cavities and bound by side chains. In solution, H-1 NMR shows that the cone conformations undergo rapid interconversion at room temperature. The alkoxy side chains are found to be indispensable for maintaining the cone conformation. In addition, these porous molecules self-assemble into hollow tubular structures in the solid state. A variety of host molecules and building blocks for constructing nanoporous solid-state structures can be expected from these molecules.
机译：烷氧基侧链侧链的二芳基磺酰胺用作构建大环芳族四磺酰胺的可靠结构基序。这个90度的结构基序在溶液和固态下均保持不变，从而可以一步形成四磺酰胺大环。这些大环在溶液和固态下呈锥形构型。对于每个分子，形成被芳族残基包围的内部空腔。大环的空腔尺寸可以通过掺入适当尺寸的芳族残基来调节。在腔中发现客体（溶剂）分子并与侧链结合。在溶液中，H-1 NMR显示圆锥构象在室温下经历快速相互转化。发现烷氧基侧链对于维持视锥构象是必不可少的。另外，这些多孔分子以固态自组装成空心管状结构。从这些分子可以预期到各种宿主分子和用于构建纳米孔固态结构的构件。

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