中科院化学所李勇军团队报道了轮状纳米石墨烯的合成。相关研究成果发表在2023年2月21日出版的《美国化学会杂志》。
石墨烯是一种具有良好的孔分布和独特的电子性能的sp-和sp2-杂化的2Dπ共轭碳材料，在催化、电子、光学、储能和转换等领域得到了广泛的研究和应用。二维共轭石墨烯片段可以为理解石墨烯的内在结构-性质关系提供深入见解。
该文中，由六个脱氢苯并[18]环烯（[18]DBA，石墨烯的最小大环单元）组成的原子精确轮状纳米石墨烯，通过六乙炔基苯的六倍Cadiot–Chodkiewicz交叉偶联获得的六丁炔前体中的六倍分子内Eglinton偶联实现。X射线晶体学分析揭示了其平面结构。六个18π电子电路的完全交叉共轭产生沿巨π核的π-电子共轭。
该项工作为合成未来具有不同官能团和/或杂原子掺杂的石墨烯碎片提供了一种可行的方法，并为石墨烯独特的电子/光物理财产和聚集行为的研究提供了一个可行的方法。
附：英文原文
Title: Synthesis of a Wheel-Shaped Nanographdiyne
Author: Guilin Hu, Jingyi He, Jing Chen, Yongjun Li
Issue&Volume: February 21, 2023
Abstract: Graphdiyne, a sp- and sp2-hybridized 2D π-conjugated carbon material with well-dispersed pores and unique electronic properties, was well investigated and applied in catalysis, electronics, optics, and energy storage and conversion. Graphdiyne fragments with conjugation in 2D can provide in-depth insights for understanding the intrinsic structure–property relationships of graphdiyne. Herein, an atomic precise wheel-shaped nanographdiyne composed of six dehydrobenzo [18] annulenes ([18]DBAs, the smallest macrocyclic unit of graphdiyne), was realized through the sixfold intramolecular Eglinton coupling in the hexabutadiyne precursors obtained by the sixfold Cadiot–Chodkiewicz cross-coupling of hexaethynylbenzene. Its planar structure was revealed by X-ray crystallographic analysis. The full cross-conjugation of the six 18π electron circuits yields the π-electron conjugation along the giant π core. This work provides a realizable method for the synthesis of future graphdiyne fragments with different functional groups and/or heteroatom doping, as well as the study of the unique electronic/photophysical properties and aggregation behavior of graphdiyne.
DOI: 10.1021/jacs.2c13604
Source: https://pubs.acs.org/doi/10.1021/jacs.2c13604
期刊信息
JACS：《美国化学会志》，创刊于1879年。隶属于美国化学会，最新IF：16.383
官方网址：https://pubs.acs.org/journal/jacsat
投稿链接：https://acsparagonplus.acs.org/psweb/loginForm?code=1000
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