基于木犀草素结构的氨基醌循环伏安特性研究

Study on Cyclic Voltammetric Behavior of Aminoquinones Based on the Structure of Luteolin

分别由木犀草素与甲胺、乙胺、苄胺及乙醇胺反应生成基于木犀草素结构的氨基醌化合物a,b,c和d,根据其结构所具有的氧化—还原性特征,采用循环伏安法对4种化合物的电化学特性进行研究。在Britton-Robinson缓冲溶液(pH=5.02)中,扫描该类化合物,并通过观察分析其循环伏安叠加情况,研究其氧化还原峰与扫速的关系,同时观测在100 mV/s扫速下化合物的叠加情况,研究其电化学差异。观察到由木犀草素和甲胺所生成的化合物a及木犀草素和乙醇胺生成的化合物d具有良好的电化学性质,其氧化还原电流与扫速之间也存在明显的线性关系。a和d在电极上的反应为可逆氧化还原反应过程,并为吸附控制过程。化合物a和d在该过程均易发生氧化反应,不易发生还原反应。

Aminoquinones a,b,c and d based on the structure of luteolin were synthesized by the reaction of luteolin with methylamine,ethylamine,benzylamine and ethanolamine,respectively.According to the oxidation-reduction characteristics of luteolin structure,the electrochemical characteristics of the four compounds were studied by cyclic voltammetry.In the Britton-Robinson buffer solution(pH=5.02),the compounds were scanned and their cyclic voltammetry superposition maps were observed.The relationship between the redox peak and the sweep velocity was observed.At the same time,the superimposition of the compounds at 100 mV/s has been observed to study its electrochemical differences.The compounds a and d formed by luteolin and methylamine,and ethanolamine,have good electrochemical properties.There is also a clear linear relationship between the redox currents and sweeps.The reaction of a and d on the electrode is reversible redox reaction,and the adsorption control process.Both a and d are susceptible to oxidation reactions during this process,and not easy to occur reduction reactions.