聚乙烯咔唑共价修饰多壁碳纳米管的合成与表征  

Synthesis and Characterization of Poly(N-vinylcarbazole)-Covalently Grafted Multiwalled Carbon Nanotubes

作　　者：张进娟 牛丽娟 顾慧丽 陈彧[1] 

机构地区：[1]教育部结构可控先进功能材料及其制备重点实验室,华东理工大学化学与分子工程学院,上海200237

出　　处：《化学世界》2012年第4期193-196,222,共5页Chemical World

基　　金：国家自然科学基金(20876046);上海市曙光跟踪计划(08GG10)资助

摘　　要：利用PVK-NH2和酰氯化的多壁碳纳米管(MWNTs)之间的酰胺化反应制备了聚乙烯咔唑共价接枝的碳纳米管杂化材料MWNT-PVK。该材料在许多常见的有机溶剂中具有良好的溶解度。在514.5nm激光的激发下,观察到的D-带和G-带强度比(ID/IG)分别从MWNTs的0.96增加到MWNT-COOH的1.05再增加到MWNT-PVK的1.19,这意味着羧基和PVK分别共价接枝到MWNTs的表面。PVK在MWNTs上的共价接枝导致了PVK的荧光强度大幅度下降,这种荧光淬灭现象,说明了在材料体系中处于激发单重态的MWNTs与给电子的PVK之间可能发生了电荷转移现象。A new poly （N-vinylcarbazole） （PVK） covalently grafted multiwa!led carbon nanotubes （MWNTs） hybrid material, MWNT-PVK, was synthesized by reaction of the surface-bound acrychloride groups in MWNT-COC1 with PVK-NH2. This material is soluble in some common organic solvents. With excitation of 514.5 nm laser, the observed D- to G-band intensity ratios （ID/IG） for MWNTs, MWNT- COOH and MWNT-PVK are about 0.96, 1.05 and 1.19, respectively. This suggested that polar carboxyl groups were introduced into the convex surface of MWNTs, and PVK was covalently grafted onto the surface of MWNTs via an amido bond. Upon excitation of 340 nm laser, the photoluminescence intensity of MWNT-PVK significantly decreases when compared to that of PVK-NH2, suggesting that the quenching process is probably due to the electron-transfer process from PVK to 1MWNTs .

关 键 词：多壁碳纳米管 聚乙烯咔唑 共价功能化 有机合成 

分 类 号：O487.1[理学—固体物理]