Large-scale synthesis of polyynes with commercial laser marking technology
Liang Fang(房良)1,†, Yanping Xie(解燕平)2, Shujie Sun(孙书杰)1, and Wei Zi(訾威)1
1 Collaborative Innovation Center of Henan Province for Energy-Saving Building Materials, Xinyang Normal University, Xinyang 464000, China; 2 Analysis&Testing Center, Xinyang Normal University, Xinyang 464000, China
Abstract The space-confined synthesis method has been an efficient way for the preparation of linear carbon chains. However, the large-scale preparation of linear carbon chains still faces many challenges due to the lack of methods for the large-scale synthesis of precursors, such as short carbon chains (polyynes), and regulation technology for the transport of reactants in one-dimensional space. Here, we report a facile method for the rapid preparation of polyynes in large quantities using a commercial laser marking machine. Spectroscopic characterizations show that a large number of polyynes, such as C8H2, C10H2, C12H2, and C14H2, can be produced by ablating the graphite plate immersed in the organic liquid using a laser marking machine. The results of in situ Raman spectroscopy investigation of C2nH2-filled single-walled carbon nanotubes further confirm that a variety of polyyne molecules are synthesized. Meanwhile, in situ Raman spectroscopy also shows that the local heating treatment can accelerate the filling process of C2nH2 into one-dimensional channels. This work provides new insights into the study of linear carbon chains and space-confined synthesis methods.
Fund: The authors thank Qiuju Zhou, Zongwen Zhang, and Dongli Xu at the Analysis and Testing Center of Xinyang Normal University (XYNU) for materials characterization. Project supported by the Nanhu Scholars Program for Young Scholars of Xinyang Normal University.
Liang Fang(房良), Yanping Xie(解燕平), Shujie Sun(孙书杰), and Wei Zi(訾威) Large-scale synthesis of polyynes with commercial laser marking technology 2022 Chin. Phys. B 31 126803
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