三苯胺雙性離子化合物的合成設計與電聚合性質研究

Abstract

本研究論文，利用高電子電洞傳導特性的三苯胺 (triphenylamine)基團作為末端基，設計合成出具有良好電化學活性及穩定性之分子，修飾上雙性離子分子之TPA-SB、含胜肽片段之TPA-MI及普通三苯胺衍生物compound 9、10、11，以電化學聚合法將此系列化合物沉積於 ITO導電玻璃上研發一系列導電高分子材料，藉此探討雙性離子分子對聚合性的影響，並以SEM影像圖觀察薄膜表面型態。同時，利用分子結構設計的不同，進行以下測試： (1) 生醫電子元件：將仿生結構TPA-SB、TPA-MI以不同比例摻混，共聚出仿生雙性離子高分子材料，利用X光電子能譜 (XPS)表面分析表面組成，並針對材料表面之親水性 (hydrophilicity)討論其在生物醫學應用上之可能性；(2)電致變色元件：由於三苯胺電致變色的特性，利用光譜電化學分析薄膜顏色變化與氧化反應電位，探討其在電致變色元件應用上之可能性。

We synthesized triphenylamine-based zwitterion TPA-SB, maleimide-functionalized triphenylamine TPA-MI, and triphenylamine derivatives compound 9, 10, 11. A systematic analysis for electrochemical polymerization of triphenylamine on an indium – tin oxide (ITO) electrode was performed, and the polymer film was investigate by scanning electron spectroscopy (SEM). There are two studies：(1)Bioelectronic character：Electrochemical polymerization of TPA-SB with different fractions of TPA-MI develop a bionic conducting polymer on ITO. Using X-ray photoelectron spectroscopy (XPS) calculate the compositions of the copolymer films. The resistance of polymer films towards the adhesion of proteins resulted from the highly hydrophilic yet net-neutral properties of the zwitterion on surfaces, so we test the surfactant hydrophilicity by water droplet contact angles analysis. (2)Electrochromic character：The triphenylamine polymer film have electrochromic character. Using spectroelectrochemistry (SEC) to discuss the correlation between electrochemical reaction and color change of polymer film.