Synthesis And Application Of Fullerene Derivatives

Due to its unique physical and chemical properties,fullerenes have become the focus of research in the fields of materials and medicine.In order to further improve the function of fullerenes,some fullerene derivatives with special functional groups have been synthesized and studied.They combine the characteristics of fullerenes and the excellent properties of functional groups,and have good development prospects in optics,electricity,catalysis and medicine.In this paper,the classic reactions of fullerenes,such as Prato and Bingel reactions,are mainly used to design and synthesize fullerene derivatives with specific structure and function,and their applications as photosensitizers and nanocatalysts are studied.The results are summarized as follows:1.Based on the concept of high-efficiency photosensitizer,a novel fullerene derivative photosensitizer C₆₀-DA was used the Prato reaction to synthesize.In comparison with C₆₀,C₆₀-DA exhibited a strong absorption in the visible region.More importantly,it went through extremely long-life triplet state under hypxia,which enabled the exiguous oxygen to approach and interact with the activated ³(C₆₀-DA)*more efficiently and produce more singlet oxygen.Further investigation illustrated that the triplet lifetime of the molecule is three times than of C₆₀;furthmore,the singlet oxygen quantum yield of C₆₀-DA is twice that of C₆₀.In conclusion,the use of this derivative as a photosensitizer has the following advantages:strong visible light absorption,no heavy atoms,and long triplet lifetime.2.A novel nanocatalytic composite material(ZnPc/(C₆₀?C?COOH?₂?₃-TiO₂)was designed and synthesized for effective photocatalytic,which combined the advantages of fullerene,TiO₂,and metal phthalocyanine.Compared with the traditional catalytic material TiO₂,the developed composite material possessed the following advantages:?1?efficient absorption in the visible light region and useful utilization of light;?2?separation of photogenerated charge carriers and enhancement of photocatalytic activity.The photocatalytic performance of the composites was examined by the reduction of p-nitrobenzene under visible light,and the results showed that the photocatalytic activity of the composites was 7 times that of TiO₂ under visible light.