Synthesis and Properties of [7]Helicene-like Compounds Fused with a Fluorene Unit

[7]­Helicene-like compounds with a fluorene unit were successfully synthesized using a platinum-catalyzed double cyclization reaction. Crystal structures and photophysical properties of these compounds were also studied. In particular, they were found to exhibit a high fluorescence quantum yield and a relatively large g value (dissymmetric factor) of circularly polarized luminescence (CPL) for small molecules.[7] 含芴单元的类螺烯化合物通过铂催化双环化反应成功合成。本研究同时对该类化合物的晶体结构与光物理性质开展了表征与分析。尤为关键的是，研究发现这类小分子兼具较高的荧光量子产率与相对较大的圆偏振发光（circularly polarized luminescence, CPL）不对称因子（g值）。