科罗尼
之字形的
六方晶系
石墨烯
结晶学
化学
炔烃
芳香性
乙醚
材料科学
分子
纳米技术
有机化学
催化作用
几何学
数学
作者
Ya Zou,Xudong Hou,Haipeng Wei,Jiawei Shao,Qing Jiang,Longbin Ren,Jishan Wu
标识
DOI:10.1002/anie.202301041
摘要
Circumcoronene, a hexagonal graphene fragment with six zigzag edges, has been the focus of theoretical studies for many years, but its synthesis in solution has remained a challenge. In this study, we present a facile method for synthesizing three derivatives of circumcoronene using Brønsted/Lewis acid-mediated cyclization of vinyl ether or alkyne. Their structures were confirmed through X-ray crystallographic analysis. Bond length analysis, NMR measurement, and theoretical calculations showed that circumcoronene mostly follows Clar's bonding model and exhibits dominant local aromaticity. Its absorption and emission spectra are similar to those of the smaller hexagonal coronene due to its six-fold symmetry.
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