Study On The Bromination Of Fulleropyrrolidine And Carbon Nanotubes

The study on the synthesis and structure of fullerene derivatives and carbon nanotubes derivatives is an active topic in the fullerene chemistry.So syntheses of brominated fullerene derivatives,brominated carbon nanotubes and carbon nanotubes derivatives,searching reaction rules,studying the relationship between their structures and properties are important for developing and extending the fullerene chemistry.This thesis is focused on the synthesis of two brominated fullerene derivatives,brominated carbon nanotubes and carbon nanotubes derivatives.It will offer data to study their properties further.1.Two fullerene derivatives,namely N-methyl-3, 4-fulleropyrrolidine and N-methyl-2-phenyl-3,4-fulleropyrrolidine, were synthesized by 1,3-dipolar cycloaddition reaction.They were treated with bromine in CS2 to form brominated fullerene derivatives. The products were characterized by ¹H-NMR,UV-vis,IR,Raman spectroscopy,Elecments analysis and Thermo gravity analysis(TGA). The results indicated that bromination were taken place on the sketch of C₆₀,the products with four bromines are candidates for forming novel C₆₀derivatives.The studies of the effect of ZnBr₂ on the bromination of C₆₀and fulleropyrrolidines were also carried out,and the products were characterized by UV-vis and IR spectroscopy.2.The reaction between carbon nanotubes and bromine was investigated.The bromine substituents on carbon nanotubes can be substituted by alkoxy groups from corresponding sodium alkoxide, resulting in the covalent attachment of alkoxy groups to the carbon nanotubes.The products were characterized by IR spectroscopy and TGA.The results indicated that the numerary ratios of carbon and alkoxy groups in two alkoxy derivatives are 55;1(C;OCH₃)and 76; 1(C;OC₂H₅),respectively.The existence of C-Br bonds promoted the alkoxidation of carbon nanotubes.