10，10′-二甲基-3,3′二氨基-9,9′-双吖啶电致化学发光行为及机理研究

Studies on the electrochemiluminescence behaviour and mechanism of 10,10′-dimethyl-3,3′-diamido-9,9′-biacridine

研究了10，10′-二甲基-3,3′二氨基-9,9′-双吖啶（简称DMDABA）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值等条件对DMDABA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，该新试剂DMDABA在KNO3乙醇溶液中产生很强的电致化学发光信号，于最优化条件下，发光强度的自然对数与DMDABA浓度的自然对数在2．16×10^-5～2．16×10^-8mol／L范围内呈良好的线性关系，检出限可达5．2×10-9mol／L．还用循环伏安法、电致化学发光光谱以及荧光光谱研究了DMDABA的电致化学发光机理．

The dlectrochemiluminescence （ECL） behaviour of a new reagent 10,10′-二甲基-3,3′-diamido-二氨基-9,9′- biacridine acridine （DMDABA） was studied. The effects of the electrochemical parameters, reaction medium and pH on the ECL were investigated. It was found that new reagent DMDABA gave a strong electrochemiluminescence in the KNO3-C2H5OH water solution when an appropriate voltage was applied on glassy carbon electrode. Under the optimum conditions, the natural logarithm of the ECL intensity of DMDABA has a good linear relationship with the natural logarithm of the concentration of DMDABA in the range of 2.16 × 10^∽5 2.16 ×10^-5mol/L, the detection limit of DMDABA was 5.2 × 10^-9 mol/L. The cyclic voltammetry, fluorescence spetrtrum and ECL spetrtrum for this ECL system have also been investigated in detail, and the possible mechanism for the ECL of DMIDABA was proposed.