On-site preparation of one-dimensional C_(60) polymer crystals  

一维C_(60)聚合物晶体的直接制备

作　　者：Xia Wang Fei Pan Yanwu Zhu 王霞;潘飞;朱彦武(中国科学技术大学化学与材料科学学院材料科学与工程系,安徽合肥230026;中国科学技术大学合肥微尺度物质科学国家研究中心,安徽合肥230026;中国科学技术大学精准智能化学重点实验室,安徽合肥230026)

机构地区：[1]Department of Materials Science and Engineering,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China [2]Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China [3]Key Laboratory of Precision and Intelligent Chemistry,University of Science and Technology of China,Hefei 230026,China

出　　处：《中国科学技术大学学报》2024年第9期2-6,32,68,共7页JUSTC

基　　金：supported by the National Key R&D Program of China(2020YFA0711502);the National Natural Science Foundation of China(52325202,52202052,52373310)。

摘　　要：The preparation of large crystals is highly important for the characterization and application of a newly found structure but remains a challenge for one-dimensional(1D)C_(60) polymers.In this work,we successfully fabricated a 1D C_(60) polymer crystal via on-site annealing of a millimeter-sized C_(60) molecular crystal withα-Li_(3)N at 500°C and ambient pres�sure.Characterizations show that the C_(60) cages in the crystal have been efficiently connected,forming 1D chains along the<110>direction in an orthorhombic 3D structure.At the same time,the crystal maintains a morphology similar to that of the pristine C_(60)crystal,providing opportunities for characterization of all the facets of the crystal via Raman spectroscopy and thus suggesting the formation mechanism of such crystals.大尺寸晶体的制备对于新材料的结构表征和应用探索至关重要,这一点对于一维富勒烯C_(60)聚合物晶体而言仍是挑战。在本工作中,我们通过将毫米级尺寸的C60分子晶体与氮化锂(ɑ-Li3N)共混之后在500℃和常压条件下直接退火,成功制备了一维C_(60)聚合物晶体。该晶体是正交相的三维结构,其中的C_(60)分子沿着<110>方向通过共价键连接形成一维链状结构,并且与初始的C_(60)分子晶体保持相似的形貌,这为通过拉曼(Raman)光谱表征一维C_(60)聚合物晶体的各个晶面提供了契机,从而为探索其形成机理提供了线索。

关 键 词：fullerene C_(60) molecular crystal on-site preparation 1D C_(60) polymer crystal covalent connection 

分 类 号：O613.71[理学—无机化学]