Biphenylene network: A nonbenzenoid carbon allotrope
Biphenylene network: A nonbenzenoid carbon allotrope
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DOI：
10.1126/science.abg4509
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发表时间：
2021-05-21
期刊：
影响因子：
56.9
通讯作者：
Gottfried, J. Michael
中科院分区：
文献类型：
--
作者：
Fan, Qitang;Yan, Linghao;Gottfried, J. Michael
对平面sp（2）杂化碳同素异形体而非石墨烯的探索，例如石墨烯撑和联苯撑网络，由于材料的预测的机械、电子和输运性质而刺激了大量的研究工作。然而，它们的合成仍然具有挑战性，因为缺乏可靠的协议，用于在碳原子的平面平铺期间生成非六边形环。我们报告了一个超平的联亚苯基网络的自下而上的生长与周期性排列的四，六，八元环的sp（2）-杂化碳原子通过表面上的互聚物脱氢（HF拉链）反应。通过扫描探针方法对这种联苯网络的表征表明，它是金属的，而不是电介质。我们希望互聚物HF拉链方法，以补充工具箱的其他非苯型碳同素异形体的合成。
The quest for planar sp(2)-hybridized carbon allotropes other than graphene, such as graphenylene and biphenylene networks, has stimulated substantial research efforts because of the materials' predicted mechanical, electronic, and transport properties. However, their syntheses remain challenging given the lack of reliable protocols for generating nonhexagonal rings during the in-plane tiling of carbon atoms. We report the bottom-up growth of an ultraflat biphenylene network with periodically arranged four-, six-, and eight-membered rings of sp(2)-hybridized carbon atoms through an on-surface interpolymer dehydrofluorination (HF-zipping) reaction. The characterization of this biphenylene network by scanning probe methods reveals that it is metallic rather than a dielectric. We expect the interpolymer HF-zipping method to complement the toolbox for the synthesis of other nonbenzenoid carbon allotropes.