论文部分内容阅读
以自行合成的丝氨酸铜Cu（Ser）2和甘氨酰甘氨酸铜Cu（Gly-Gly）2作为SOD模拟物，在pH7．8及（20．0±0．5）℃条件下，用脉冲辐解法分别研究其催化超氧阴离子自由基（O）歧化反应的动力学，得到了反应级数n及催化速率常数kcat，并初步探讨了反应机理．证实了水溶液中Cu（Ⅱ）－氨基酸络合物催化O歧化反应乒乓机理中的第一步反应是整个反应过程的速控步骤．
The self-synthesized serine copper Cu (Ser) 2 and glycylglycine copper Cu (Gly-Gly) 2 were used as SOD mimics at pH7.8 and (20.0 ± 0.5) ℃, The kinetics of the catalysis of the disproportionation reaction of superoxide anion radical (O) was studied respectively. The reaction order n and the catalytic rate constant kcat were obtained. The reaction mechanism was also discussed. It was confirmed that Cu (II) -amino acid complex in aqueous solution catalyzed the O-disproportionation reaction. The first step in the ping-pong mechanism is the quick step of the whole reaction process.