HIGHER FULLERENES - SEPARATION AND MOLECULAR-STRUCTURES

Higher Fullerenes up to C110 were isolated from carbon soot by using H PLC and the presence of magic number was ascertained. By C-13 NMR meas urement, molecular structures and isomers of C78, C82, and C84 were de termined. There are three isomers of C78. The production ratio of C2v' , C2v, D3-C78 is about 5:2:2. The main isomer of C82 have the structur e with C2 symmetry and its production yield is about 70% of total C82. There are two main isomers in C84 (D2,D2d-C84). The preliminary inves tigation indicated that any higher fullerenes up to C90 does not show superconductivity even when alkali-metals doped.