2,6-二(5-甲基噁二唑)吡啶的电化学性质及离子识别性能研究  

Electrochemical Properties and Ion Recognition Character of 2,6-Di(5-methyl-1,3,4-oxadiazol-5-yl) Pyridines

作　　者：颜振宁[1] 姜伟[2] 冶保献[1] 郭一鹏[1] 

机构地区：[1]郑州大学化学系,河南郑州450052 [2]漯河职业技术学院基础部,河南漯河462000

出　　处：《分析测试学报》2008年第3期253-255,259,共4页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目(20475050);河南省杰出青年基金资助项目(74100510022)

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。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. Elec- trochemical 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^-5cm^2/s and 0.89cm/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 Pb^2＋ ions.

关 键 词：2 6-二(5-甲基嗯二唑)吡啶 电化学 玻碳电极 离子识别性能 

分 类 号：O657.15[理学—分析化学]