The unusual tubular formation of supramolecular organic framework by optically active macrocyclic calixsalen was shown by single crystal X-ray diffraction. The monomers are bound either by hydrogen bonds between OH groups at lower rim of the macrocycle to form a “hourglass” structure or form a capsule with the calixsalens arranged in a head-to-head motif.

中文翻译：

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光学活性的纯有机杯芳烃意外地形成了管状结构

单晶X射线衍射显示出旋光性大环杯芳烃不寻常地形成了超分子有机骨架。单体通过大环下部边缘的OH基团之间的氢键结合，形成“沙漏”结构，或与杯形花序排列成头对头的形式形成胶囊。