含胺基取代聯吡啶釕錯合物修飾奈米碳管之研究與應用

Abstract

有鑒於[Ru(bpy)3]2+衍生物具有獨特光電化學性質以及5-胺基菲羅啉（簡稱NH2-phen）可進行氧化聚合反應，本論文便以NH2-phen與[Ru(bpy)2]Cl2製備[Ru(bpy)2(NH2-phen)]2+，再藉由化學還原修飾法將其修飾於奈米碳管(簡稱MWNT )表面，以探討其應用潛力。根據螢光圖譜分析、原子力顯微術以及穿隧電子顯微術影像，我們證實 [Ru(bpy)2(NH2-phen)]2+可經由化學還原修飾法吸附於碳管表面，而吸附速率與[Ru(bpy)2(N2-phen)]2+經偶氮化後脫氮的反應速率有關，並與反應條件，如時間、溫度、維生素C以及亞硝酸鈉的濃度有關。本論文也以含[Ru(bpy)2(phen-NH2)]2+的修飾碳管微粒作為光敏劑，藉以誘發Thionine chloride進行氧化聚合反應。實驗結果顯示此修飾微粒可在UV光照射下加速Thionine chloride氧化聚合。此外，我們也將該奈米碳管製成修飾電極，藉以檢測葡萄糖、維生素C、尿酸以及NADH，發現修飾有[Ru(bpy)2(NH2-phen)]2+的碳管比未修飾的碳管具有較高靈敏度，可知[Ru(bpy)2(NH2-phen)]2+具有生化感測的應用潛力。In view of that [Ru(bpy)3]2+ derivatives have unique photoelectrochemical properties and 5-aminophenanthroline can be carried out oxidative polymerization reaction, we synthesized [Ru(bpy)2(NH2-phen)]2+ with NH2-phen and [Ru(bpy)2]Cl2. Then we modified carbon nanotubes (MWNT) with [Ru(bpy)2(NH2-phen)]2+ by chemical reduction method. According to fluorescence spectra analysis, atomic force microscopy and tunneling electron microscopic imaging, we confirmed that [Ru(bpy)2(NH2-phen)]2+ can be modified on carbon nanotubes by chemical reduction method and the adsorption rate is dependent on the denitrogenation rate of [Ru(bpy)2(N2-phen)]2+. And the adsorption rate was related to the reaction conditions such as reaction time, temperature, the concentration of ascorbic acid and sodium nitrite. We also used MWNT|[Ru(bpy)2(NH2-phen)]2+ to photochemically induce oxidative polymerization for Thionine chloride. Furthermore, we prepared ITO|[Ru(bpy)2(NH2-phen)]2+|MWNT|Nafion modified electrodes for detection of glucose, ascorbic acid, uric acid and NADH. The results showed this modified electrode’s sensitivity is better than non-modified electrode.