A novel π‐extended “superhelicene” based on hexa‐peri‐hexabenzocoronenes (HBCs) has been synthesized by an efficient four‐step synthetic procedure starting from diphenyl ether. Comprehensive structural analysis of the helicene was performed by NMR spectroscopy and mass spectrometry measurements together with X‐ray analysis. Physicochemical analysis of the superhelicene and suitable HBC references revealed it had outstanding fluorescent features with quantum yields of over 80 %.

中文翻译：

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Oxa [7] superheliceneene：基于六-per-hexahexabenzocoronenes的π扩展螺旋发色团

通过二苯醚为原料，通过高效的四步合成方法合成了一种基于六-per-hexabenzocoronenes（HBCs）的新型π扩展的“超螺旋”。通过NMR光谱和质谱测量以及X射线分析对螺旋烯进行了全面的结构分析。对超螺旋烯和合适的HBC参照物的理化分析表明，它具有出色的荧光特征，量子产率超过80％。