石墨电弧中C5环的原位捕获与形成

In-situ capture and formation of C5 ring in graphite arc

五元环是富勒烯的重要构筑基元,是形成凸多面体碳笼的关键因素,研究C 5环的形成对理解富勒烯自下而上的生长机理有着重要的意义.该文通过在石墨电弧放电体系中引入氯源,原位捕获到了C 5与C 60的[4+2]环加成衍生物C 60(C 5 Cl 6).对该分子进行质谱和紫外-可见吸收光谱的表征,并利用X-射线单晶衍射明确了C 60(C 5 Cl 6)的分子结构.此外,还通过一系列C 60衍生物的质谱表征,对C 5环和C 60(C 5 Cl 6)结构的演进路线进行了分析.

Five-membered ring is an important building block of fullerenes and the key to form a convex polyhedron carbon cage.The study on the formation of C 5 ring is of significance to understand the bottom-up growth mechanism of fullerenes.In this paper,C 60(C 5 Cl 6),the[4+2]cycloaddition derivative of C 60 was captured in situ by introducing chlorine atoms into the arc discharge of graphite.The molecular structure of C 60(C 5 Cl 6)was characterized using mass spectrum and UV-Vis absorption spectrum,and was determined by X-ray single crystal diffraction.In addition,the structure formation of C 5 ring and C 60(C 5 Cl 6)was analyzed via mass spectra of a series of C 60 derivatives.