外端修飾三苯胺的新型具光/電活性兩性聚醯胺樹枝狀高分子之合成及性質研究

Synthesis and Properties of the Novel Photo-/ Electro-active Dendrimer Modification with Triphenylamine

褚健銘(Chien-Ming Chu)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400486

摘要

本論文合成了第二代外圍修飾了三苯胺的新型具光/電活性聚醯胺樹枝狀高分子(PAMAM-TPA G2)，首先利用NMR進行結構鑑定，並且利用NMR氫數比計算PAMAM G2表面接枝三苯胺的接枝率。在UV-Vis圖譜中可發現，PAMAM-TPA G2吸收峰強度遠高於三苯胺，而在循環伏安儀(CV)中也觀察到，PAMAM-TPA G2的電位與三苯胺相同，但電流值遠高於三苯胺，此可能是因為PAMAM G2本身末端結構具有大量胺基，容易進行化學改質，因此在PAMAM G2的外圍同時修飾上了許多三苯胺單體，使得PAMAM-TPA G2具有遠高於三苯胺的光活性及電活性。而由於三苯胺本身具有明顯的電致變色特性，因此預期當PAMAM G2接上三苯胺形成PAMAM-TPA G2後也會具有電致變色的特性，光/電活性樹枝狀高分子會因為調整電位而得到不同顏色的改變。另外三苯胺本身具有可逆的氧化還原特性可用於生物感測器方面，而PAMAM-TPA G2末端接枝許多的三苯胺，所以預期PAMAM-TPA G2用於抗壞血酸偵測會具有優於三苯胺單體氧化的感測能力和靈敏度。

關鍵字

三苯胺 ； 聚醯胺樹枝狀高分子 ； 光/電活性

並列摘要

In this study, the photo/electroactive G2 PAMAM-TPA was synthesized by means of pheripheral modification of Triphenylamine (TPA) on the shell of Poly(amidoamine) G2 (G2 PAMAM). The number of grafted TPA on G2 PAMAM shell was calculated by the 1H NMR. As the TPA was attached on the G2 PAMAM, we found the absorption intensity of PAMAM-TPA G2 is much higher than triphenylamine, CV was also observed in a similar effect, this may be due to PAMAM G2 terminal structure having a plurality of amine where TPA molecules are easily grafted. Thus by decoration of a number of TPA on the G2 PAMAM shell, the PAMAM-TPA G2 would exhibit photoactivity and electroactivity which is much higher than that of triphenylamine.
Moreover, since the triphenylamine has obvious electrochromic characteristics, we expected as the triphenylamine monomers were attached on the shell of G2 PAMAM it will have electrochromic properties. Here we used both UV-visible spectrophotometer and cyclic voltammetry to measure electrochromic characteristics; and the results showed that the color of photo/eletroactive G2 PAMAM-TPA would be changed while we adjusted potentiometer. Further more triphenylamine as well as has reversible redox capability that can be used as biosensors for detection of ascorbic acid, Thus we expected that PAMAM-TPA G2 not only can be employed to detect AA but also have more promising sensing performance and sensivity than TPA, because of the fact that PAMAM G2 terminal structure having a plurality of amine where TPA molecules are easily grafted.

並列關鍵字

poly(amidoamine) ； photo/electroactive ； Triphenylamine

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