【摘要】 用循环伏安法和计时电量法等电化学方法研究了配体2,6-二(5-甲基噁二唑)吡啶(DMOP)在玻碳电极(GCE)上的电化学行为。结果表明:在-0.3~-1.3 V电位范围内及0.1 mol/L四丁基高氯酸铵(TBAP)的N,N-二甲基甲酰胺底液中,DMOP于-0.8 V(vs.SCE)左右处产生一对准可逆的氧化还原峰,还原峰电流和氧化峰电流与扫描速率的平方根(v1/2)呈良好的线性关系,表明DMOP在GCE上的伏安行为是一受扩散控制的电化学过程,其电极反应过程是单电子转移,传递系数α为0.56,扩散系数为2.84×10-5cm2/s,电极反应速率常数Kf为0.89 cm/s。利用循环伏安法研究了该化合物对过渡金属离子的识别作用,发现该化合物在一定浓度下对Pb2+有较好的选择识别性。更多还原

【Abstract】 The electrochemical behavior of 2,6-di(5-methyl-1,3,4-oxadiazol-5-yl)pyridines(DMOP) on glassy carbon electrode was studied by cyclic voltammetry and chronocoulometry.Electrochemical results show that in 0.1 mol/L TBAP DMF solution,DMOP exhibits a pair of quasi-reversible redox peaks at about-0.8 V(vs.SCE).The reduction and oxidation peak currents are linear with the square root of the scan rate,which shows that electrochemical behavior of DMOP on GCE is a diffusion-control process.The electrode process involves single electron transfer reaction with α= 0.56.The diffusion coefficient D and reaction rate constants Kf are 2.84×10-5 cm2/s and 0.89 cm/s,respectively.The cyclic voltammetry was also employed for the recognition study of DMOP to transition-metal ions.The results indicate that there is an excellent selective recognition of DMOP to Pb2+ ions.更多还原