On-surface synthesis of a doubly anti-aromatic carbon allotrope.
On-surface synthesis of a doubly anti-aromatic carbon allotrope.
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DOI：
10.1038/s41586-023-06566-8
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发表时间：
2023-11
期刊：
影响因子：
64.8
通讯作者：
Gross, Leo
中科院分区：
文献类型：
--
作者：
Gao, Yueze;Albrecht, Florian;Roncevic, Igor;Ettedgui, Isaac;Kumar, Paramveer;Scriven, Lorel M.;Christensen, Kirsten E.;Mishra, Shantanu;Righetti, Luca;Rossmannek, Max;Tavernelli, Ivano;Anderson, Harry L.;Gross, Leo
合成碳同素异形体，如石墨烯，碳纳米管和富勒烯已经彻底改变了材料科学，并导致了新技术。许多假设的碳同素异形体已被讨论，但很少有实验研究。最近，非常规的合成策略，如动态共价化学和表面合成已被用于创建新形式的碳，包括γ-石墨炔，富勒烯聚合物，联苯网络和环碳。环[N]碳是由N个碳原子组成的分子环;迄今为止报道的三种（N = 10，14和18）是双芳族的，这引发了一个问题：是否有可能制备双反芳族版本？在这里，我们报告的合成和表征的反芳族碳的同素异形体，环[16]碳，通过使用尖端诱导的表面化学。除了从原子力显微镜的结构信息，我们探讨了它的电子结构，通过记录轨道密度图与扫描隧道显微镜。环[16]碳中键长变化的观察证实了其双重反芳香性，与理论一致。C16的简单结构使其成为研究芳香性极限的有趣模型系统，并且其高反应性使其成为新型碳同素异形体的有前途的前体。碳的同素异形体环[16]碳已合成使用表面化学和扫描隧道显微镜和原子力显微镜，其特征在于，揭示轨道密度和键长交替，这表明它是双反芳族。
Synthetic carbon allotropes such as graphene, carbon nanotubes and fullerenes have revolutionized materials science and led to new technologies. Many hypothetical carbon allotropes have been discussed, but few have been studied experimentally. Recently, unconventional synthetic strategies such as dynamic covalent chemistry and on-surface synthesis have been used to create new forms of carbon, including γ-graphyne, fullerene polymers, biphenylene networks and cyclocarbons. Cyclo[N]carbons are molecular rings consisting of N carbon atoms; the three that have been reported to date (N = 10, 14 and 18) are doubly aromatic, which prompts the question: is it possible to prepare doubly anti-aromatic versions? Here we report the synthesis and characterization of an anti-aromatic carbon allotrope, cyclo[16]carbon, by using tip-induced on-surface chemistry. In addition to structural information from atomic force microscopy, we probed its electronic structure by recording orbital density maps with scanning tunnelling microscopy. The observation of bond-length alternation in cyclo[16]carbon confirms its double anti-aromaticity, in concordance with theory. The simple structure of C16 renders it an interesting model system for studying the limits of aromaticity, and its high reactivity makes it a promising precursor to novel carbon allotropes. The carbon allotrope cyclo[16]carbon has been synthesized using on-surface chemistry and characterized with scanning tunnelling microscopy and atomic force microscopy, revealing orbital densities and bond-length alternation, which show it to be doubly anti-aromatic.
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光子量子处理器上的变分特征值求解器。
影响因子：
16.6
作者：
Peruzzo, Alberto;McClean, Jarrod;Shadbolt, Peter;Yung, Man-Hong;Zhou, Xiao-Qi;Love, Peter J.;Aspuru-Guzik, Alan;O'Brien, Jeremy L.
通讯作者：
O'Brien, Jeremy L.
DOI：
10.1021/acs.jpca.0c09692
发表时间：
2020-12-24
期刊：
The journal of physical chemistry. A
影响因子：
--
作者：
Baryshnikov GV;Valiev RR;Nasibullin RT;Sundholm D;Kurten T;Ågren H
通讯作者：
Ågren H
影响因子：
56.9
作者：
Fan, Qitang;Yan, Linghao;Gottfried, J. Michael
通讯作者：
Gottfried, J. Michael
影响因子：
56.9
作者：
Kaiser, Katharina;Scriven, Lorel M.;Anderson, Harry L.
通讯作者：
Anderson, Harry L.
影响因子：
56.9
作者：
Gross, Leo;Mohn, Fabian;Meyer, Gerhard
通讯作者：
Meyer, Gerhard