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以烷基硫醇和二茂铁衍生物构建的氧化-还原自组装多层膜为模型体系,研究烷基硫醇分子链长对多层膜电化学行为的影响.实验表明,二茂铁基团和电极之间的电子传递反应速率随两者距离的增加呈现指数级下降的趋势;烷基硫醇分子链长对自组装膜电化学行为的影响于不同情况下表现不同.本实验条件下,当多层膜上的电活性基团与电极比较接近时,长链分子自组装膜呈现较强的电化学响应.而当电极与电活性基团之间的距离较远时,短链烷基硫醇分子自组装膜呈现较强的电化学响应.
Oxidation-reduction self-assembled multilayer films with alkylthiol and ferrocene derivatives were used as model systems to study the influence of molecular chain length of alkylthiol on the electrochemical performance of multilayer films. The experimental results show that the ferrocene group And the electron transfer reaction rate between the electrodes showed an exponential decline with the increase of the distance between the two electrodes.The influence of alkylmercaptan molecular chain length on the electrochemical behavior of the self-assembled films was different under different conditions.In this experiment, When the electroactive groups on the multilayers are relatively close to the electrodes, the long-chain molecules exhibit a strong electrochemical response, whereas when the distance between the electrodes and the electroactive groups is too short, the short-chain alkyl Self-assembled thiol molecules showed a strong electrochemical response.