Two-Dimensional And Three-Dimensional Assembly Of Fullerenes:Preparation And Properties

Fullerenes have received great attention since they were discovered in 1985.Fullerene has a unique molecular structure and electronic structure,and its physicochemical properties have been intensively studied.Fullerene has potential applications in the fields of batteries,luminescence,biomedicine and other fields.In recent years,many scholars have reported fullerene assemblies with different morphologies and structures,and discovered many new potential properties of fullerenes,thus making fullerene assemblies a new hot.The fullerene assembly has both conjugated ?-electron structure characteristics and micro-nano material properties,and its structure has micro or macro designability,so the study of the fullerene assembly is of great importance in many applications significance.In addition,at present,there are relatively few researches on the application of fullerene in the fields of catalysis and luminescence,and its more potential properties need to be developed urgently.In order to develop new applications of fullerenes,this paper takes the construction of fullerene assembly as the method,focuses on the preparation of two-and three-dimensional assemblies of fullerenes and explores their applications in the fields of catalysis,energy storage,and luminescence.We carried out the following two works:1)We embed fullerene C60 in the metal-organic framework ZIF-67 by a simple method,and prepare the C60@ZIF-67 assembly with the strong interaction of the organic ligands of ZIF-67 and C60.The prepared C60@ZIF-67 has a pomegranate-like structure.Then,the precursor C60@ZIF-67 was annealed.Using cobalt-aza porous carbon as a two-dimensional template,C60 was embedded in the pores to construct a two-dimensional assembly of C60.The control of ZIF-67 morphology and structure by C60 makes the material have more excellent electrocatalytic properties,thus becoming a catalyst that can replace Pt/C in the oxygen reduction reaction.And the catalytic effect also helps the conversion of polysulfides in Li-S batteries,thereby improving the performance of Li-S batteries.2)We have prepared three-dimensional fullerene assembly with cubic and dice shape morphology structures using endohedral fullerenes Tb3N@C80,Er3N@C80 and Sc3N@C80 by liquid-liquid interface sedimentation.And for the first time,we used Nano-CT,a synchrotron radiation soft X-ray imaging technology,to confirm the internal structure of dice-shaped fullerenes,and found that the formation of dice has abnormal photoluminescence enhancement properties.