10,10’-二甲基-3,3’-二磺酸基-9,9’-双吖啶的电致化学发光行为

研究了新试剂10,10'-二甲基-3,3'-二磺酸基-9,9'-双吖啶(简称DMDSBA)的电致化学发光(ECL)行为. 考察了电化学参数、反应介质以及pH等条件对DMDSBA电致化学发光信号的影响. 结果表明, 在玻碳电极上施加适当电压时, DMDSBA在KNO₃溶液介质中产生很强的电化学发光信号, 于优化的实验条件下, 发光强度的自然对数与DMDSBA浓度的自然对数在1.0×10^-5-1.0×10^-8 mol·L^-1范围内呈良好的线性关系,检出限可达2.3×10^-9 mol·L^-1. 并用循环伏安法、电致化学发光光谱以及荧光光谱, 研究了DMDSBA的电致化学发光机理.

Electrochemiluminescent Behavior of 10,10'-dimethyl-3,3'-disulfo-9,9'-biacridine

The electrochemiluminescence (ECL) behaviour of a new reagent 10,10'-dimethyl-3,3'-disulfo-9,9'-biacridine (DMDSBA) was studied. The effects of the electrochemical parameters, the reaction medium and pH on the ECL were investigated in detail. It was found that the new reagent DMDSBA gave a strong electrochemiluminescence in KNO₃ solution when an appropriate voltage was applied on glassy carbon electrode. Under the optimum conditions, the natural logarithm of the ECL intensity of DMDSBA has a good linear relationship with the natural logarithm of the concentration of DMDSBA in the range of 1.0×10^-5 -1.0×10^-8 mol·L^-1, the detection limit of DMDSBA was 2.3×10^-9 mol·L ^-1. The cyclic voltammetry, fluorescence spetrum and ECL spetrum for this ECL system have also been investigated in detail, based on which a possible mechanismfor the ECL of DMDSBA was proposed.