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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >An in situ spectroelectrochemical study on the orientation changes of an [(FeLN2O3)-L-III] metallosurfactant deposited as LB Films on gold electrode surfaces
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An in situ spectroelectrochemical study on the orientation changes of an [(FeLN2O3)-L-III] metallosurfactant deposited as LB Films on gold electrode surfaces

机译：一种沉积为金电极表面LB膜的[（FELN2O3）-L-III]金属胶原物质活性剂的取向变化的原位光谱电化学研究

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摘要

In this paper we analyze the changes in molecular orientation triggered by electrochemical reduction of an iron-containing surfactant in Langmuir-Blodgett films deposited onto gold electrodes. The metallosurfactant [Fe III (LN2O3)] (1) is an established molecular rectifier capable of unidirectional electron transfer between two electrodes. A gradual decrease in the activity is observed in sequential current vs. potential curves upon repeated cycles. Here we evaluate the redox response associated with the reduction of the Fe III / Fe II couple in a single monolayer, as well as in a 5-layer LB film of 1. We use polarization modulation infrared reflection absorption spectroscopy (PM IRRAS) to follow structural and orientation changes associated with such applied potential scans. We observe that the reduction of the Fe center becomes increasingly irreversible because an Fe-Ophenolate bond is cleaved. This transformation is accompanied by an almost vertical change in the orientation of metallosurfactant molecules in LB films.
机译：在本文中，我们分析了沉积在金电极上的Langmuir-Blodgett薄膜中的含铁表面活性剂的电化学减少触发的分子取向的变化。金属表面活性剂[FeII（LN2O3）]（1）是能够在两个电极之间单向电子传递的建立的分子整流器。在重复循环时，在顺序电流与潜在曲线中观察到活动的逐渐减小。在这里，我们评估与单个单层中的Fe III / Fe II夫妇的氧化还原响应，以及5层LB膜中的1.我们使用偏振调制红外反射吸收光谱（PM IRRAS）跟随与这种应用潜在扫描相关的结构和方向变化。我们观察到，由于Fe-Ophenolate键裂解，Fe中心的减少变得越来越不可逆转。该转化伴随着LB膜中金属胶质剂分子的方向的几乎垂直变化。

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