A fan-shaped synthetic chiral nanographene  

作　　者：Haonan Shi Bangyuan Xiong Ying Chen Chaojun Lin Jiajian Gu Yanpeng Zhu Jiaobing Wang 

机构地区：[1]School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Chinese Chemical Letters》2023年第2期154-157,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21871298,91956118)。

摘　　要：We report the synthesis and characterization of a fan-shaped chiral nanographene 1,which is composed of 6 hexabenzocoronene subunits with 216 conjugated carbon atoms.In the dehydrocyclization reaction,38 C–C bonds are formed simultaneously.1 exhibits strong panchromatic absorption from the ultraviolet to the near-infrared,with an absorption coefficient of 209,000 L mol^(-1)cm^(-1)at 564 nm.Optically pure samples,obtained via chiral HPLC,show distinct ECD signals(|Δε|=704 L mol^(-1)cm^(-1)at 405 nm).Upon excitation,1 emits near-infrared fluorescence at 820 nm with a quantum yield of 5.5%.These photophysical properties of 1 were analyzed with the assistance of DFT calculations.

关 键 词：NANOGRAPHENE Molecular nanocarbon CHIRALITY Polycyclic aromatic hydrocarbon HELICENE 

分 类 号：TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]