利用循环伏安法研究氢-四氮杂卟啉的电势-pH图

Study on the potential-pH diagram of metal-free porphyrazine with cyclic voltammetry

将阳离子氢-四氮杂卟啉在碳电极表面吸附修饰后，浸入由CH3COOH，H3BO3和H3PO4组成并用0.2mol／LNaOH溶液调节其pH值为2～12的缓冲溶液中，测得了其循环伏安图并得到了电势-pH图．根据电势-pH图中斜率的变化和氢-四氮杂卟啉的化学结构，得出在电势-pH图中各区域可能形成化合物的型态．

After adsorbed on the surface of the graphite electrode, the cationic metal-free porphyrazine is immersed in the buffer solution consisting of CH3COOH, H3BO3 and H3PO4, which pH value is adjusted to 2-12 by 0.2 mol/L NaOH. By measuring the cyclic voltammograms, the potential-pH diagram in pH =2-12 buffers is obtained. According to the slope changes of the diagram and the compound structure, the possible forming of the compound can be got in various areas of the diagram.