Cui Weili, Shi Lei, Cao Kecheng, Kaiser Ute, Saito Takeshi, Ayala Paola, Pichler Thomas
Faculty of Physics, University of Vienna, 1090, Vienna, Austria.
State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
Angew Chem Int Ed Engl. 2021 Apr 26;60(18):9897-9901. doi: 10.1002/anie.202017356. Epub 2021 Mar 22.
Carbyne is a one-dimensional allotrope of carbon consisting of a linear chain of carbon atoms bonded to each other with exceptional strength. Its outstanding mechanical, optical, and electronic properties have been theoretically predicted, but its stability has only been achieved when grown encapsulated in the hollow core of carbon nanotubes. One of the advantages of this confinement is that its properties can be controlled by the chain's length and surrounding environment. We investigated an alternative way of gaining control of its properties is using isotope labelling as tuning mechanism. The optimized liquid precursor was first chosen among several options, which can greatly enhance the yield of the confined carbyne. Then isotopic labelled liquid precursor was encapsulated for further synthesis of isotopic labelled confined carbyne. This allowed us to obtain pioneering results on isotope engineered carbyne with around 11.9 % of C-labelling using C-methanol as precursor.
卡宾是碳的一种一维同素异形体，由碳原子线性链组成，这些碳原子彼此以超强的强度相连。其出色的机械、光学和电子性能已在理论上得到预测，但只有当它生长在碳纳米管的中空核心中并被包裹时才能实现其稳定性。这种限制的优点之一是其性能可以通过链的长度和周围环境来控制。我们研究了一种通过使用同位素标记作为调节机制来控制其性能的替代方法。首先在几种选择中挑选出优化的液体前驱体，这可以大大提高受限卡宾的产率。然后将同位素标记的液体前驱体进行封装，以进一步合成同位素标记的受限卡宾。这使我们能够使用¹³C-甲醇作为前驱体，在同位素工程化的卡宾上获得开创性的结果，其中¹³C标记率约为11.9%。
