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

• Main Authors: Jing-Hong Lin, 林敬浤
• Other Authors: Yuhlong Oliver Su, Ph. D.
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/53621530663204809727

碩士 === 國立暨南國際大學 === 應用化學系 === 98 === 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.