螺旋烯
五角形
结晶学
化学
发光
手性(物理)
异构化
材料科学
分子
物理
对称性破坏
几何学
光电子学
有机化学
数学
手征对称破缺
量子力学
Nambu–Jona Lasinio模型
催化作用
作者
Yang‐Yang Ju,Huan Luo,Z. Q. Li,Bingjing Zheng,Jiang-Feng Xing,Xuan-Wen Chen,L. Q. Huang,Guohui Nie,Bin Zhang,Junzhi Liu,Yuan‐Zhi Tan
标识
DOI:10.1002/anie.202402621
摘要
The incorporation of pentagon-heptagon pairs into helical nanographenes lacks a facile synthetic route, and the impact of these pairs on chiroptical properties remains unclear. In this study, a method for the stepwise construction of pentagon-heptagon pairs in helical nanographenes by the dehydrogenation of [6]helicene units was developed. Three helical nanographenes containing pentagon-heptagon pairs were synthesized and characterized using this approach. A wide variation in the molecular geometries and photophysical properties of these helical nanographenes was observed, with changes in the helical length of these structures and the introduction of the pentagon-heptagon pairs. The embedded pentagon-heptagon pairs reduced the oxidation potential of the synthesized helical nanographenes. The high isomerization energy barriers enabled the chiral resolution of the helicene enantiomers. Chiroptical investigations revealed remarkably enhanced circularly polarized luminescence and luminescence dissymmetry factors with an increasing number of the pentagon-heptagon pairs.
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