Zhu Zheng-Zhong, Chen Zuo-Chang, Yao Yang-Rong, Cui Cun-Hao, Li Shu-Hui, Zhao Xin-Jing, Zhang Qianyan, Tian Han-Rui, Xu Piao-Yang, Xie Fang-Fang, Xie Xiao-Ming, Tan Yuan-Zhi, Deng Shun-Liu, Quimby Jennifer M, Scott Lawrence T, Xie Su-Yuan, Huang Rong-Bin, Zheng Lan-Sun
State Key Lab for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467-3860, USA.
Sci Adv. 2019 Aug 23;5(8):eaaw0982. doi: 10.1126/sciadv.aaw0982. eCollection 2019 Aug.
Carboncones, a special family of all-carbon allotropes, are predicted to have unique properties that distinguish them from fullerenes, carbon nanotubes, and graphenes. Owing to the absence of methods to synthesize atomically well-defined carboncones, however, experimental insight into the nature of pure carboncones has been inaccessible. Herein, we describe a facile synthesis of an atomically well-defined carboncone[1,2] (CH) and its soluble penta-mesityl derivative. Identified by x-ray crystallography, the carbon skeleton is a carboncone with the largest possible apex angle. Much of the structural strain is overcome in the final step of converting the bowl-shaped precursor into the rigid carboncone under mild reaction conditions. This work provides a research opportunity for investigations of atomically precise single-layered carboncones having even higher cone walls and/or smaller apex angles.
碳锥是一类特殊的全碳同素异形体，预计具有使其有别于富勒烯、碳纳米管和石墨烯的独特性质。然而，由于缺乏合成原子级精确碳锥的方法，对纯碳锥性质的实验性洞察一直难以实现。在此，我们描述了一种简便的方法来合成原子级精确的碳锥[1,2]（CH）及其可溶的五（均三甲苯基）衍生物。通过X射线晶体学确定，其碳骨架是一个具有最大可能顶角的碳锥。在温和的反应条件下，将碗状前体转化为刚性碳锥的最后一步克服了大部分结构应变。这项工作为研究具有更高锥壁和/或更小顶角的原子精确单层碳锥提供了一个研究机会。
