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  • 學位論文

以電化學引發芴酮類與三苯胺類的氫鍵

Electrochemically Induced Hydrogen Bonding of Fluorenones and Triarylamines

指導教授 : 蘇玉龍
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摘要


本論文包含四大主題,第一個主題是探討芴酮類的電化學與光譜電化學研究以及芴酮類與二苯脲化合物以電化學的方式引發氫鍵的產生。本研究針對芴酮類主體上依序增加nitro group,作其電化學與光譜電化學的探討。研究發現,當芴酮類主體上的nitro group越多,第一個還原的電位越正,表示越容易被還原,並且芴酮類主體上每多一個nitro group,CV圖的還原波就多一個。由透光薄層電化學法(optically transparent thin-layer electrochemistry , OTTLE)可以得知,當芴酮類具有nitro group時,原本200 ~ 300 nm附近的吸收峰下降,在600 ~ 800nm會有新的吸收峰產生,這是因為受到拉電子基-NO2的影響。 第二個主題則是研究含三苯胺類化合物藉由滴定不同的ligand,利用電化學與光譜電化學的方法觀察化合物氧化後與受質產生氫鍵的能力。將滴定的ligand分成三大類,第一類是formation constant極小的情形,在循環伏安法中可以得知,三苯胺化合物,當ligand加入後,第一與第二個氧化還原對隨著受質濃度的增加會往負的電位偏移。第二類是formation constant較大的情形,當ligand加入後,第一個可逆的氧化波不動,而第二個可逆的氧化波,隨著ligand濃度增加,會在第一與第二個氧化波之間產生第三個不可逆的氧化波。第三類是formation constant極大的情形,第一個可逆的氧化波不動,而第二個氧化波,隨著ligand濃度增加,會在第一與第二個氧化波之間產生第三個可逆的氧化波。 第三個主題是研究陰離子對苯胺寡聚物的影響,從實驗的結果得知,氯離子對苯胺寡聚物的陰離子作用影響最大,推測這與陰離子本身的大小與強度有關。 第四個主題是研究樹枝狀苯胺類的電化學與光譜電化學探討,得知,因為均具有N=N拉電子基與苯環推電子基的影響,而有charge transfer band 產生。

並列摘要


This thesis involves four topics. The first topic has been concerned with the electrochemical as well as spectral studies of fluorenones. More nitro groups bonded to fluorenone will shift more potential to the anodic direction. And electrochemically induced hydrogen bonding of fluorenones with 1,3-diphenyl urea. The second topics has been on the electrochemically induced hydrogen bonding between the oxidation forms of amines and various oxygen and nitrogen containing ligands. There are three cases in the situation. First, when the formation constant is small, the first and second oxidation wave shifts in redox potential in cyclic voltammetry. Second, when the formation constant is large, the first oxidation wave remained unchanged while the second one shifts in irreversible potential. Third, when the formation constant is largest, the first oxidation wave remained unchanged while the second one shifts in redox potential. The third topic has been concerned with the anion to detect oligomer derivatives. In experimentation, Cl- is the best anion to detect oligomer derivatives. Because of the radius and the intensity. The forth topic has been concerned with the synthesis, electrochemistry, spectroelectroelectrochemistry in triaryamine denderimers. The azo group has to regard as electron withdrawing, benzene regard as electron donor. The result comes into charge transfer band.

參考文獻


參考文獻
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