本論文分為兩個部分,第一部分是利用電化學研究觀察乙醯基胺基苯酚及相似化合物在不同pH 值環境下氧化還原電位的改變,結果顯示隨著 pH 值增加時,氧化電位會往負電位偏移,且吸收波長會紅位移。乙醯基胺基苯酚及相似化合物因為 OH 位於不同位置的取代基,也會影響化合物的氧化電位,當OH 基在對位時電子最容易共振,因此最容易氧化。在當對位是 NH2 時,在水溶液中會 protonation成 NH3+,此為拉電子基使氧化較不易進行,導致化合物不容易氧化。 第二部分是利用電化學研究醯胺咪嗪及相似化合物,結果顯示由兩個苯環所夾的中央七環,因結構不同對氧化還原電位造成影響,當氮原子上取代基為拉電子基時,會使化合物較難氧化。另外運用工作電極為透光薄層電極 ( optically transparent thin-layer electrode ) 的光譜電化學,可測定每個化合物的穩定度。
There are two topics in this thesis. The first one involves the study on the electrochemical and spectral properties of acetamidophenol and analogues. The results showed that the peak potential shifted negatively and the wavelength of absorbance showed a red shift as the pH value increased. In addition, the OH substituents at different locations also affected the oxidation potential of acetamidophenol and analogues. The second topic involves the study on the cyclic voltammetry and spectroelectrochemistry characters of carbamazepine and analogues. We observed that the redox potentials of carbamazepine and analogues were affected by the electron-withdrawing group and the different functional group of the middle ring .