Construction of Supramolecular Architectures Composed of pi-Molecules Conducting Reversible Disc-bowl transformation

PI共轭体系能够经历可逆的盘-碗结构变化，有望改变在分子平面上离域的pi电子的性质。由这种体系构建的超分子体系必须允许开发新的功能材料。脱氢苯并轮烯(DBA)是一种由苯环和乙炔单元组成的环状pi共轭体系，是上述体系的候选化合物之一，因为DBA在钴等金属配位时会经历从盘到碗的结构变化。在本工作中，我们合成了具有不同取代基团的DBA衍生物，并通过X-射线结晶学揭示了它们的组装结构。

Pi-conjugated systems which are capable of undergoing reversible disc-to-bowl structural changes are expected to change a nature of pi-electrons delocalized on the molecular plane. Supramolecular architecture build from such systems must allow to develop new functional materials. A cyclic pi-conjugated system composed of benzene rings and acetylene units, so called dehydrobenzoannulene (DBA) is one of candidates for the above mentioned system because DBA is known to undergo disc-to-bowl structural changes upon coordination of metals such as Co. In this work, we synthesized DBA derivatives with various substituent groups and revealed their assembly structures by X-ray crystallography.