摘要
用单扫描极谱法研究了8-氮鸟嘌呤(8-AG)与Cu2+形成络合物的条件,测定了该络合物有关的特征常数。在pH 3.00的HAc-NH4Ac缓冲溶液中,8-AG与Cu2+可以形成1∶1的络合物。该络合物产生一个不可逆吸附还原波,有1个电子和1个质子参与了电极反应,该络合物的条件稳定常数为5.73×105,反应活化能为12.1 kJ/mol,电极反应速率常数为1.04×10-4cm/s。
The formative condition of 8-azaquanine （8-AG）-Cu^2＋ complex have been studied, and characteristic constants of the complex have been determined by single-sweep polarography. In the buffer of HAc-NH4Ac （pH 3.00）, a adsorption wave of 8-azaquanine-Cu^2＋ has been obtained and the molar ratio of the complex is 8-AG： Cu^2＋ = 1 ： 1. The experimental results show that it is a irreversible reduction wave involving one electrode and one proton. The conditional stability constant is 5.73 × 10^5 , activation energy is 12.1 kJ/mol, rate constant of electrode reaction 1.04 × 10^-4 cm/S.
出处
《分析试验室》
CAS
CSCD
北大核心
2006年第5期6-9,共4页
Chinese Journal of Analysis Laboratory
基金
感谢辽宁师范大学开放实验室基金资助此项研究.
