School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou, 510275, China.
Angew Chem Int Ed Engl. 2019 Nov 18;58(47):16966-16972. doi: 10.1002/anie.201907972. Epub 2019 Oct 7.
Two synthetic nanographenes (NGs), N-H7H and C-H7H, were prepared. N-H7H is doped with nitrogen, and C-H7H is the all-carbon analogue. Both are hexapole [7]helicenes (H7Hs), and their structures were identified by single-crystal X-ray diffraction. Sharp contrasts in absorption ( λ , 683 vs. 593 nm), emission ( λ , 894 vs. 777 nm), and electrochemical behavior ( E , 0.28 vs. 0.53 V) were observed between N-H7H and C-H7H, and the origin of these differences was rationalized by theoretical calculations. Studies on N-H7H and C-H7H set a clear example to elucidate the remarkable effects of N-doping on the physical properties of NGs.
两种合成的纳米石墨烯（NGs），N-H7H 和 C-H7H，被制备出来。N-H7H 掺杂了氮，而 C-H7H 是全碳类似物。它们都是六极 [7] 螺旋形（H7Hs），其结构通过单晶 X 射线衍射确定。在吸收（ λ ，683 与 593nm）、发射（ λ ，894 与 777nm）和电化学行为（ E ，0.28 与 0.53V）方面，N-H7H 和 C-H7H 之间存在明显的对比，通过理论计算对这些差异的起源进行了合理化。对 N-H7H 和 C-H7H 的研究为阐明氮掺杂对 NGs 物理性质的显著影响提供了明确的范例。
