Freytag Clara, Schuster Christin, Cui Weili, Tagmatarchis Nikos, Cantón-Vitoria Rubén, Shi Lei, Parth Emil, Yanagi Kazuhiro, Ayala Paola, Pichler Thomas
University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Vienna, Austria.
State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Basic Research Center of Excellence for Functional Molecular Engineering, Nanotechnology Research Center, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
J Phys Chem Lett. 2025 May 22;16(20):4990-4994. doi: 10.1021/acs.jpclett.5c01063. Epub 2025 May 12.
Low-dimensional carbon allotropes belong to the most revolutionary materials of the most recent decades. Confined carbyne, a linear chain of sp-hybridized carbon encapsulated inside a small-diameter carbon nanotube host, is one extraordinary nanoengineering example. Inspired by these hybrid structures, we demonstrate the feasibility to synthesize nitrogen-doped confined carbyne by using azafullerenes (CN) encapsulated in nanotubes ("peapods") as precursors for the growth of confined carbyne. Resonance Raman spectroscopy as a site selective local probe has served to identify the changes in the spectra of nitrogen-doped versus pristine carbon peapods and confined carbyne. We are able to disentangle frequency changes due to charge transfer from changes due to the difference in mass for both the nanotube and the carbyne, where different effects dominate. This study demonstrates a suitable pathway to achieve controlled doping of carbyne chains via the use of specifically doped precursors.
低维碳同素异形体属于近几十年来最具革命性的材料。受限卡宾是一种由sp杂化碳构成的线性链，被封装在小直径碳纳米管主体内部，是一个非凡的纳米工程实例。受这些混合结构的启发，我们证明了以封装在纳米管（“豆荚”）中的氮杂富勒烯（CN）作为受限卡宾生长的前驱体来合成氮掺杂受限卡宾的可行性。共振拉曼光谱作为一种位点选择性局部探针，已用于识别氮掺杂与原始碳豆荚以及受限卡宾光谱的变化。我们能够区分由于电荷转移引起的频率变化和由于纳米管与卡宾质量差异引起的频率变化，其中不同的效应占主导。这项研究展示了一条通过使用特定掺杂的前驱体来实现对卡宾链进行可控掺杂的合适途径。
