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  • 學位論文

動力學研究銅胺基酸活化過氧化氫中pH與有機酸效應

Kinetic study of the effects of pH and organic acid on the activation of hydrogen peroxide catalyzed by Copper(II) amino acid complexes

指導教授 : 吳劍侯

摘要


本研究利用銅胺基酸錯合物,於25oC的磷酸緩衝溶液中活化過氧化氫,並偵測反應中的2-甲喹啉藍(QB)的初始氧化速率來探討銅錯合物活化過氧化氫效率。本實驗透過改變pH及活性氧化物種抑制劑的添加,了解過氧化氫活化系統的反應機制及其主要活性氧化物種。實驗結果發現,在以銅胺基酸錯合物活化過氧化氫的系統中,銅胺基酸錯合物可有效增加過氧化氫解離常數Ka,因此反應效率隨pH值上升而增加。此外,透過有機酸類抑制劑的添加,發現其抑制效果符合Non-competitive 的抑制模型,再藉由抑制劑與一價銅生成關係,推論LCu(I)OOH•為系統中主要的活性氧化物種,造成後續QB的氧化反應。

並列摘要


參考文獻


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