JST-ERATO (Japan Science and Technology Agency, Exploratory Research for Advanced Technology) Itami Molecular Nanocarbon Project, Chikusa, Nagoya 464-8602, Japan.
Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.
Science. 2017 Apr 14;356(6334):172-175. doi: 10.1126/science.aam8158.
The synthesis of a carbon nanobelt, comprising a closed loop of fully fused edge-sharing benzene rings, has been an elusive goal in organic chemistry for more than 60 years. Here we report the synthesis of one such compound through iterative Wittig reactions followed by a nickel-mediated aryl-aryl coupling reaction. The cylindrical shape of its belt structure was confirmed by x-ray crystallography, and its fundamental optoelectronic properties were elucidated by ultraviolet-visible absorption, fluorescence, and Raman spectroscopic studies, as well as theoretical calculations. This molecule could potentially serve as a seed for the preparation of structurally well-defined carbon nanotubes.
一个完全由边缘共享的苯环组成的闭合环的碳纳米带的合成，是有机化学 60 多年来一直难以实现的目标。在这里，我们报告了通过迭代 Wittig 反应和随后的镍介导的芳基-芳基偶联反应合成这样一种化合物。其带结构的圆柱形形状通过 X 射线晶体学得到证实，通过紫外-可见吸收、荧光和拉曼光谱研究以及理论计算阐明了其基本光电性质。这种分子有可能作为制备结构明确的碳纳米管的种子。
