金属卟啉化学共价和非共价修饰多壁碳纳米管  

Covalently and Noncovalently Chemical Functionalization of Multi-walled Carbon Nanotube with Metalloporphyrin

作　　者：王红科[1] 彭圣明[1] 赵鸿斌[1,2] 许兰兰[1] 张辉[1] 陆旭甲 

机构地区：[1]湘潭大学化学学院环境友好化学与应用省部共建教育部重点实验室,湘潭411105 [2]东莞理工学院化学与环境工程学院,东莞523808

出　　处：《化学学报》2009年第14期1643-1649,共7页Acta Chimica Sinica

基　　金：湖南省自然科学基金(No.04JJ40013);广东省自然科学基金(No.7007735)资助项目

摘　　要：合成了5-(4-羟基苯基)-10,15,20-三苯基卟啉锌配合物,与活化的多壁碳纳米管(MWNT)发生酯化反应,从而得到金属卟啉有机共价化学修饰的多壁碳纳米管复合物;利用金属卟啉环上的π电子与多壁碳纳米管管壁上的π电子通过π-π堆积效应,得到金属卟啉有机非共价修饰的多壁碳纳米管复合物.通过透射电镜(TEM)考察了金属卟啉-多壁碳纳米管复合物的形貌特征;通过红外光谱对产物的化学结构进行了表征;通过紫外光谱、荧光光谱和热失重分析(TGA)对比分析了两类复合物,发现非共价修饰的金属卟啉-碳纳米管复合物的荧光淬灭率更高,非共价修饰的金属卟啉-碳纳米管复合物中卟啉的含量比较高.Zinc 5-（4-hydroxyphenyl）-10,15,20-triphenylporphyrin was synthesized. Then the covalently modified nanocomposite was gained through the esterification between the oxidized multi-walled carbon nanotube （MWNT） and the zincporphyrin. Noncovalently modified with the zincporphyrin, the nanocomposites was gotten through π-π pileup. The morphology of the nanocomposites was studied by transmission electron microscopy （TEM）, and the structure of resultant products was characterized by FT-IR spectra. The comparison of the two kinds of nanocomposites was studied by UV absorption, fluorescence spectroscopy and thermal gravity analysis （TGA）. Moreover, the noncovalent functionalization provides a higher fluorescence quenching than the covalent functionalization. The weight percentage of metalloporphyrin attached to the MWNT through π-π pileup is higher.

关 键 词：金属卟啉 多壁碳纳米管 共价化学修饰 非共价化学修饰 复合物 

分 类 号：TB383.1[一般工业技术—材料科学与工程]