A pentagonal macrocycle (MC5-PER) with radialene topology was facilely synthesized through a selective one-pot Suzuki–Miyaura cross-coupling reaction. The resulting product is endowed with a pentagonal architecture as revealed by its single crystal structure, which affords the smallest ring strain and the best conjugation. As tetraphenylethene subunits are embedded, MC5-PER is highly emissive in the solid state due to the aggregation-induced emission effect. Because of the flexible structure and preferable fibre-like self-assembly, the aggregate of MC5-PER displays interesting polymorphism-dependent emission and acts as a sensitive fluorescence sensor for explosives detection.

中文翻译：

---

高发射苯撑膨胀的[5]芳烃

通过选择性的一锅Suzuki-Miyaura交叉偶联反应，可以轻松合成具有星形烯结构的五边形大环（MC5-PER）。由其单晶结构所揭示的产物具有五边形结构，其提供最小的环应变和最佳的结合。由于嵌入了四苯基乙烯亚基，由于聚集诱导的发射效应，MC5-PER在固态时具有高发射率。由于具有灵活的结构和较好的类似纤维的自组装，MC5-PER的聚集体显示出有趣的多态性依赖性发射，并充当用于爆炸物检测的灵敏荧光传感器。