Electrochemical and spectral studies of intermolecular interaction between porphyrin rings and aromatic amines

[[abstract]]本論文探討紫質與對苯二胺的電化學及光譜電化學性質。紫質與對苯二胺的氧化電位以循環伏安法得知。在循環伏安法中，紫質與對苯二胺的氧化電位會隨著相互間的滴定而改變。使用透光薄層電化學法(optically transparent thin-layer electrode, OTTLE) 研究光譜的變化。討論紫質及對苯二胺在不同氧化態間的作用力。 當對苯二胺氧化後會因與紫質環中心作用而形成氫鍵，在光譜上出現新的吸收帶，為氧化後的對苯二胺與紫質環產生作用力的證明。以比爾定律(Beer’s law)計算各分子的莫耳吸收係數，並以電位變化及光譜計算紫質與對苯二胺作用的形成常數(formation constant)。[[abstract]]The electrochemical and spectral properties of different free base porphyrin with p-phenylenediamine (PD) have been studied. The oxidation potentials of porphyrin and p-phenylenediamine were obtained by cyclic voltammetry (CV). The oxidation potential and wave changed by titration between porphyrin and p-phenylenediamine. The spectral change was investigated by using optically transparent thin-layer electrode (OTTLE). The interaction between different oxidation states of porphyrins and p-phenylenediamine are discussed. When the PD is oxidized, it interacts with porphyrin core by forming hydrogen bonding. It exhibits new bands in the UV-Vis spectra, and this new band is a strong evidence of interaction between oxidized PD and porphyrin. We calculated the extinction coefficient by Beer’s law, and the formation constant between porphyrin and p-phenylenediamine by UV-Vis spectra and redox potential change.[[note]]碩