Molecular switching on surfaces

IF 8.2 1区 化学 Q1 CHEMISTRY, PHYSICAL
Jorn D. Steen, Daniël R. Duijnstee, Wesley R. Browne
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引用次数: 1

Abstract

Molecular switching has established itself as a key functionality of building blocks developed for addressable materials and surfaces over the last two decades. Many challenges in their use and characterisation have been presented by the wide variation in interfaces studied, these ranging from truly single-molecule devices to two-dimensional self-assembled monolayers and thin films that bridge the gap between surface and macroscopically bulk materials (polymers, MOFs, COFs), and further still to other interfaces (solid–liquid, liquid–air, etc.). The low number density of molecules on monolayer-coated interfaces as well as in thin films, for example, presents substantial challenges in the characterisation of the composition of modified interfaces. The switching of molecular structure with external stimuli such as light and electrode potential adds a further layer of complexity in the characterisation of function. Such characterisation “in action” is necessary to correlate macroscopic phenomena with changes in molecular structure. In this review, key classes of molecular switches that have been applied frequently to interfaces will be discussed in the context of the techniques and approaches used for their operando characterisation. In particular, we will address issues surrounding the non-innocence of otherwise information-rich techniques and show how model – non-switching – compounds are often helpful in confirming and understanding the limitations and quirks of specific techniques.

Abstract Image

表面上的分子开关
在过去的二十年中,分子开关已经成为可寻址材料和表面开发的构建模块的关键功能。研究界面的广泛变化带来了使用和表征方面的许多挑战,从真正的单分子器件到二维自组装单层和薄膜,这些单层和薄膜弥合了表面和宏观大块材料(聚合物,mof, COFs)之间的差距,进一步到其他界面(固体-液体,液体-空气等)。例如,单层涂覆界面和薄膜上的低分子数密度对修饰界面组成的表征提出了实质性的挑战。分子结构与外部刺激(如光和电极电位)的切换增加了功能表征的进一步复杂性。要将宏观现象与分子结构的变化联系起来,这种“活动中”的表征是必要的。在这篇综述中,分子开关的主要类别已经经常应用于界面将讨论的技术和方法的背景下,用于其操作特性的表征。特别是,我们将解决围绕信息丰富的技术的非清白性的问题,并展示模型-非开关-化合物如何经常有助于确认和理解特定技术的局限性和怪癖。
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来源期刊
Surface Science Reports
Surface Science Reports 化学-物理:凝聚态物理
CiteScore
15.90
自引率
2.00%
发文量
9
审稿时长
178 days
期刊介绍: Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.
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