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Electrotriggered Confined Self-assembly of Metal–Polyphenol Nanocoatings Using a Morphogenic Approach
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acs.chemmater.7b03349
Clément Maerten 1 , Lionel Lopez 1 , Paolo Lupattelli 1, 2, 3 , Gaulthier Rydzek 4, 5 , Sergey Pronkin 6, 7 , Pierre Schaaf 1, 2, 6, 8, 9 , Loïc Jierry 1, 6 , Fouzia Boulmedais 1, 2
Affiliation  

Supramolecular metal-phenolic thin films attract an increasing interest since they allow the design of new types of self-assembling materials, such as tunable electronics or biomaterials. In this study, a new electrotriggered self-assembly of tannic acid-Fe(III) (TA-Fe(III)) nanocoatings was developed using the morphogenic approach with Fe(III) ions as a morphogen. Morphogens are molecules or ions produced locally that diffuse into the solution and induce a chemical reaction or interaction in a confined space near a surface. Using a mixture of TA and Fe(II) ions in contact with an electrode, a confined electrogenerated gradient of Fe(III) was obtained by application of an anodic current to locally form TA-Fe(III) coordination complexes. TA-Fe(III) nanocoatings, based on di- and tri-coordinated complexes, were thus obtained. Both the film thickness and its self-assembly kinetics were tuned by controlling the Fe(II)/TA molar ratio of the building solution, the intensity, and the duration of the applied current. We showed that this strategy can be applied to two other polyphenols (gallic acid and rosmarinic acid). This new electrotriggered confined self-assembly of metal–polyphenol gives new perspectives in applications such as antioxidant coating.

中文翻译:

使用形态发生方法的金属多酚纳米涂层的电触发约束自组装

超分子金属酚醛薄膜引起了越来越多的兴趣,因为它们允许设计新型的自组装材料,例如可调电子器件或生物材料。在这项研究中,开发了一种新的电触发的鞣酸-Fe(III)(TA-Fe(III))纳米涂层的自组装,该方法使用了以Fe(III)离子为形态发生剂的形态发生方法。色原是局部产生的分子或离子,它们扩散到溶液中并在表面附近的狭窄空间中引起化学反应或相互作用。使用TA和Fe(II)离子的混合物与电极接触,通过施加阳极电流局部形成TA-Fe(III)配位络合物,可得到有限的电生成的Fe(III)梯度。因此获得了基于二配位和三配位配合物的TA-Fe(III)纳米涂层。通过控制建筑溶液的Fe(II)/ TA摩尔比,强度和施加电流的持续时间,可以调节膜厚度及其自组装动力学。我们证明了该策略可以应用于其他两种多酚(没食子酸和迷迭香酸)。这种新的电触发的金属-多酚受限自组装为抗氧化剂涂层等应用提供了新的视角。
更新日期:2017-11-15
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