電催化反應之應用與研究

• Main Author: 池彩綾
• Other Authors: Chong Mou Wang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/82416783585247590759

碩士 === 國立臺灣師範大學 === 化學研究所 === 90 === Abstract In order to identify the reactive oxygen species generated in the luminol chemiluminescence reaction, we used N-acetyl-3,7-dihydroxyphenoxazine (denoted amplex red) as a probe. Amplex red can react with hydroxyl radical to produce resorufin. Resorufin is a highly fluorescing species. Its formation and the associated characteristic emission bands become a useful tool in diagnosis of the reactive oxygen species derived from H2O2. In this thesis we described the results during this characterization. Besides, we also found that vitamin K3 (denoted VK3) is a useful electrochemical catalyst. Cyclic voltammetry and emission spectroscopy suggested that VK3 might form 1:1 complexes with 3-chloropropanol and sodium 2,3-dichloropropionate. The equilibrium constants were estimated to be 1000 M-1 and 100 M-1, respectively, for the reaction of VK3 with 3-chloropropanol and sodium 2,3-dichloropropionate based on the electrochemical techniques. Based on the emission spectroscopic method, the equilibrium constants were slightly greater, about 104 M-1. The reduced VK3 was also found as an effective catalyst for the reduction of oxygen. By using superoxide dismutase (SOD) and amplex red as probes, we confirmed that superoxide anion radical and the derived reactive oxygen species could be produced in aerated solutions as VK3 was incorporated. According to the in-situ monitoring of the proton levels in these systems, the reactive oxygen species produced by the catalysis of VK3 in aerated solutions were evidenced to be able to cause degradation of these chlorinated compounds.