呋喃甲酰基吡唑啉酮Cu(Ⅱ)配合物吸附波的研究

Study on Adsorptive Wave of Copper-HPMaFP Complex

在pH=5.0的HAc—NaAc介质中，Cu（Ⅱ）与1-苯基-3-甲基-4-呋喃甲酰基-吡唑啉酮-5（HPMαFP）生成配合物，于-0．55V（V8．SCE）处出现一尖锐、灵敏的极谱峰，Cu含量在1．5-9．0mg·ml^-1。区间时与峰电流呈线性关系。用多种电化学方法研究了极谱波的性质及反应机理，证明-0．55V处的极谱波为配合物吸附波，峰电流由中心离子Cu（Ⅱ）还原产生。用直线法测得配合物的组成为Cu^2＋：HPMαFP=1：2，表观稳定常数为3．89×10^5。

In the medium of HAc -NaAe （pH =5.0）, Cu（ Ⅱ ） reacts with HPMαFP to form a complex and there is a sharp and sensitive polarographic wave at -0.55V（ vs SCE）. The peak height is linear with the concentration of Cu（ Ⅱ ） in the range of 1.5 -5. 0mg · mL^-1. Many electrochemical methods are used to study the properties of the polarographie wave and the mechanism of electrode reaction and it is proved that the polarographie wave at -0.55V is an adsorptive wave of the complex. The peak current is produced by reduction of Cu（ Ⅱ ）. The mola ration of the complex is as follow： Cu（ Ⅱ ） ： HPMαFP = 1 ： 2, and the conditional formation constant is 3.89 × 10^5.