Double π-Extended Undecabenzo[7]helicene

被引：85

作者：

Chen, Ying ^{[1
]}

Lin, Chaojun ^{[1
]}

Luo, Zhixing ^{[1
]}

Yin, Zhibo ^{[1
]}

Shi, Haonan ^{[1
]}

Zhu, Yanpeng ^{[1
]}

Wang, Jiaobing ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem, Guangzhou 510275, Guangdong, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 14期

基金：

中国国家自然科学基金;

关键词：

chiral nanographene; chiroptical property; extended conjugation; helicene; PAH;

D O I：

10.1002/anie.202014621

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work reports the first double pi-extended undecabenzo[7]helicene 1, which is a large chiral nanographene, composed of 65 fused rings and 186 conjugated carbon atoms. The molecular identity of 1 has been confirmed by single crystal X-ray diffraction. A wine coloured solution of 1 in dichloromethane absorbs light from ultraviolet to the near infrared, featuring an extremely large molar absorption coefficient of 844 000 M-1 cm(-1) at 573 nm. Optically pure 1 shows a record high electronic circular dichroism intensity in the visible spectral range (|Delta epsilon|=1375 M-1 cm(-1) at 430 nm) known for any discrete polycyclic aromatic hydrocarbon. These unusual photophysical properties of 1 contrast sharply with those of a mono-undecabenzo[7]helicene derivative 2.

引用

页码：7796 / 7801

页数：6

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