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Highly emissive phenylene-expanded [5]radialene
Jie Yu1, Chunlin Tang, Xinggui Gu
1School of Science and School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Guangdong 518055, China. hezikai@hit.edu.cn lixingui@tongji.edu.cn.
Abstract:
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.
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