Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
J Am Chem Soc. 2020 Aug 5;142(31):13322-13327. doi: 10.1021/jacs.0c06156. Epub 2020 Jul 17.
The azulene moiety, composed of contiguous pentagonal and heptagonal rings, is a structural defect that alters the electronic, magnetic, and structural properties of graphenes and graphene nanoribbons. However, nanographenes embedded with an azulene cluster have not been widely investigated because these compounds are difficult to synthesize in their pure form. Herein, azulene-embedded nanographenes bearing a unique cove-type edge were synthesized by a novel synthetic protocol. Experimental and theoretical investigations revealed that this cove edge imparts stable helical chirality, unlike normal cove edges. The in-solution self-association behavior and the structural, electronic, and electrochemical properties were also described in detail.
薁环部分由连续的五元和七元环组成，是一种结构缺陷，会改变石墨烯和石墨烯纳米带的电子、磁性和结构性质。然而，嵌入薁环簇的纳米石墨烯由于难以以纯形式合成，因此尚未得到广泛研究。在此，通过一种新的合成方案合成了具有独特穹顶型边缘的薁嵌入纳米石墨烯。实验和理论研究表明，与普通穹顶边缘不同，这种穹顶边缘赋予了稳定的螺旋手性。还详细描述了其在溶液中的自组装行为以及结构、电子和电化学性质。
