单层碳纳米管的化学修饰

单层碳纳米管 (SWNT)是 Iijima博士 1]于 1 993年首次发现的 .它具有非常独特的物理和化学性质 ,因而成为近年来研究的热点问题 .随着单层碳纳米管的合成技术和纯化研究的不断完善 2～ 5] ,关于它的研究方向开始转向化学反应和应用研究 .由于单层碳纳米管不溶于水或有机溶剂而限制了对其化学性质的研究 .单层碳纳米管的端头是由碳的五元环和六元环组成的半球形 .氧化作用可将该端头打开并转化为羧基 ,从而与其它的化学试剂发生反应 .Liu Jie等 6] 用浓硫酸和浓硝酸的混合物氧化单层碳纳米管 ,将之裁剪成 1 50～ 80 0 nm的“短管”.在…

Chemical Modification of Single-wall Carbon Nanotube

Single-wall carbon nanotube (SWNT) was prepared by d.c. arc discharge method and purified by filtration method. After refluxed in HNO₃, the ends of SWNT were opened and oxidized into carboxylate group, which may react with other reagents. For chemical modification of SWNT, the carboxyl terminated SWNT reacted with CH₃(CH₂)₁₅ NH₂ with the aid of the condensation agent DCC to obtain the derivatives of SWNT with the amido-alkyl chain which enhanced the solubility of SWNT in organic solvent. The results of micro IR prove the formation of amido group in SWNT sample(v(C-O)=1 647 cm^-1 ). The FT Raman results show that SWNT sample preserve its structure after the condensation reaction( ω_r=181 cm^-1 ).