阴离子存在下(OEP)MG(Ⅱ)的电化学氧化机理研究

A Mechanistic Study of Electrochemical Oxidation Processes of (OEP)Mg(Ⅱ) in the Presence of Anions

用电化学滴定和现场光谱电化学方法研究考察了DCE中OH~－，F^-和Cl-等阴离子存在下的（OEP）Mg（Ⅱ）的电极氧化过程．发现阴离子能与（OEP）Mg（目）轴向配位，形成五配位化合物，从而引起（OEP）Mg（Ⅱ）的氧化峰电位的负移；在生成二价环阳离子的过程中伴随后行化学反应．获得了反应产物的氧化还原峰电位．

In the presence of F-, OH-, Cl-, electrochemical redox of (OEP)Mg(Ⅱ) [2,3,7, 8, 12, 13, 17, 18 octaethy1-21H, 23H-porphine magnesium (Ⅱ)] are investigated in DCE/0. 1 mol/L solution by cyclic votammetry and spectroelectrochemistry. In the presence of anions, anions are axially coordinated to (OEP)Mg(Ⅱ ) generate (OEP)Mg(Ⅱ)Y, the E1/2 of (OEP)Mg(Ⅱ)Y oxidation are negatively shifted. A chemical reaction following the second oxidation step is observed, the E1/2 of the reaction product is obtained. Mechanism of (OEP)Mg(Ⅱ) in the halogen and OH- anions titration process has been proposed.