Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CONICET, Diagonal 113 y 64, 1900, La Plata, Argentina.
INQUIMAE (CONICET), Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, C1428EHA, Buenos, Aires, Argentina.
Chempluschem. 2020 Aug;85(8):1616-1622. doi: 10.1002/cplu.202000358. Epub 2020 May 20.
Electroactive thin films are an important element in the devices devoted to energy conversion, actuators, and molecular electronics, among others. Their build-up by the layer-by-layer technique is an attractive choice since a fine control over the thickness and composition can be achieved. However, most of the assemblies described in the literature show a lack of internal order, and their thicknesses change upon oxidation-state alterations. In this work, we describe the formation of layer-by-layer assemblies of redox surfactants and polyelectrolytes that leads to the construction of mesoscale organized electroactive films. In contrast to thin films prepared with traditional redox polymers, here, the redox surfactant does not only allow the control of the film meso-organization (from 2D hexagonal to circular hexagonal phases) but it also allows the control of the number and position of the redox centers. Finally, these films show high stability and a negligible structural deformation under redox-state changes.
电活性薄膜在能量转换、致动器和分子电子学等领域的器件中是一个重要的组成部分。通过层层技术来构建电活性薄膜是一个很有吸引力的选择，因为可以精细地控制厚度和组成。然而，文献中描述的大多数组件都缺乏内部有序性，并且它们的厚度会随着氧化态的改变而变化。在这项工作中，我们描述了通过层层组装氧化还原表面活性剂和聚电解质来构建介观有序的电活性薄膜。与使用传统氧化还原聚合物制备的薄膜相比，在这里，氧化还原表面活性剂不仅可以控制薄膜的介观组织（从二维六方相到圆形六方相），还可以控制氧化还原中心的数量和位置。最后，这些薄膜在氧化还原状态变化下表现出高稳定性和可忽略的结构变形。
