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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 the ligand 2,6-di (5-methyloxadiazole) pyridine (DMOP) on glassy carbon electrode (GCE) was investigated by cyclic voltammetry and chronoamperometry. The results showed that in the potential range of -0.3 ~ -1.3 V and 0.1 mol / L tetrabutylammonium perchlorate (TBAP) in N, N-dimethylformamide, DMOP was at -0.8 V (vs. SCE) produced a pair of quasi-reversible redox peaks, the reduction peak current and oxidation peak current and the square root of the scan rate (v1 / 2) showed a good linear relationship, indicating that the DMOP GCE on the volt-ampere behavior is a diffusion Controlled electrodeposition process, the electrode reaction process is single electron transfer, the transfer coefficient α is 0.56, the diffusion coefficient is 2.84 × 10-5cm2 / s, the electrode reaction rate constant Kf is 0.89cm / s. Cyclic voltammetry was used to study the recognition effect of the compound on transition metal ions. It was found that the compound has better selectivity for Pb2 + at certain concentration.