Jin Jun, Dong Zhengping, He Jianguo, Li Rong, Ma Jiantai
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 People's Republic of China.
Nanoscale Res Lett. 2009 Mar 7;4(6):578-583. doi: 10.1007/s11671-009-9282-1.
Novel covalent porphyrin and its complexes (Co(2+), Zn(2+)) functionalized multi-walled carbon nanotubes (MWNTs) have been successfully synthesized by the reaction of the carboxyl on the surface of MWNTs which was synthesized to use carbon radicals generated by the thermal decomposition of azodiisobutyronitrile (AIBN) with 5-p-hydroxyphenyl-10,15,20-triphenyl-porphyrin and its complexes (Co(2+), Zn(2+)). Three resulting nanohybrids were characterized by spectroscopy (FT-IR, Raman, and UV-vis), TGA, and TEM. The quality of porphyrin attached to the MWNTs was determined from thermogravimeric analysis (TGA) of the MWNTs, which showed a weight loss of about 60%. The Raman and absorption spectroscopy data showed that the electronic properties of modified MWNTs were mostly retained, without damaging their one-dimensional electronic properties. From fluorescence measurements, it was observed that the porphyrin and its complexes (Co(2+), Zn(2+)) were nearly quenched by MWNTs, indicating that this covalently modified mode facilitated the effective energy or electron transfer between the excited porphyrin moiety and the extended pi-system of MWNTs.
通过用偶氮二异丁腈（AIBN）热分解产生的碳自由基合成的多壁碳纳米管（MWNTs）表面的羧基与5-对羟基苯基-10,15,20-三苯基卟啉及其配合物（Co(2+)、Zn(2+)）反应，成功合成了新型共价卟啉及其配合物（Co(2+)、Zn(2+)）功能化的多壁碳纳米管（MWNTs）。通过光谱学（傅里叶变换红外光谱、拉曼光谱和紫外可见光谱）、热重分析（TGA）和透射电子显微镜（TEM）对三种所得纳米杂化物进行了表征。从多壁碳纳米管的热重分析（TGA）确定附着在多壁碳纳米管上的卟啉质量，其显示约60%的重量损失。拉曼光谱和吸收光谱数据表明，改性多壁碳纳米管的电子性质大多得以保留，而未破坏其一维电子性质。通过荧光测量观察到，卟啉及其配合物（Co(2+)、Zn(2+)）几乎被多壁碳纳米管猝灭，这表明这种共价修饰模式促进了激发态卟啉部分与多壁碳纳米管的扩展π-体系之间的有效能量或电子转移。
