Embedded Metal Yttrium Preparation, Separation Of Fullerenes And Structure

Endohedral Metallofullerenes (EMFs) which are different from fullerenes in various properties such as chemical and physical properties, molecule and electrical properties, electronic structures, have a wide range of potential applications in photoelectrochemical materials, magnetic resonance imaging contrast agents, and medical diagnosis. Because of the low yields, various species (e.g., various metals, cage sizes, and symmetries) and difficult purification, these attractive molecules are also not widely or deeply researched.In this paper, we prepare the soot by classic DC arc discharge with various sources of yttrium, isolate the soot by means of four diverse treatments, and with the help of column chromatographic isolation, we enrich a great quantity of yttrium metallofullerenes. Finally, a series of Y metallofullerenes based on different fullerene cages, i.e. Y2C80(I), Y2C82(I, III), Y2C84(I, III), Y2C90(I), Y2C92(I, II) and Y@C82are successfully isolated by multi-steps HPLC, and we also confirm that the structure of Y2@C82(IIII) is exactly the same as that of Y2C2@C82(III), i.e. C82-C3v (8), detected by MS, Vis-NIR, CV,13C NMR.