Nánási Dalma Edit, Kunfi Attila, Ábrahám Ágnes, Mayer Péter J, Mihály Judith, Samu Gergely F, Kiss Éva, Mohai Miklós, London Gábor
MTA TTK Lendület Functional Organic Materials Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary.
Laboratory of Interfaces and Nanostructures, Eötvös Loránd University, Pázmány Péter stny. 1/A, 1117 Budapest, Hungary.
Langmuir. 2021 Mar 16;37(10):3057-3066. doi: 10.1021/acs.langmuir.0c03275. Epub 2021 Mar 1.
The construction of a donor-acceptor Stenhouse adduct molecular layer on a gold surface is presented. To avoid the incompatibility of the thiol surface-binding group with the donor-acceptor polyene structure of the switch, an interfacial reaction approach was followed. Poly(dopamine)-supported gold nanoparticles on quartz slides were chosen as substrates, which was expected to facilitate both the interfacial reaction and the switching process by providing favorable steric conditions due to the curved particle surface. The reaction between the surface-bound donor half and the CF-isoxazolone-based acceptor half was proved to be successful by X-ray photoelectron spectroscopy (XPS). However, UV-vis measurements suggested that a closed, cyclopentenone-containing structure of the switch formed on the surface irreversibly. Analysis of the wetting behavior of the surface revealed spontaneous water spreading that could be associated with conformational changes of the closed isomer.
本文介绍了在金表面构建供体-受体施滕豪斯加合物分子层的过程。为避免硫醇表面结合基团与开关的供体-受体多烯结构不相容，采用了界面反应方法。选择石英载玻片上聚多巴胺负载的金纳米颗粒作为基底，由于颗粒表面呈弯曲状，有望通过提供有利的空间条件促进界面反应和开关过程。通过X射线光电子能谱（XPS）证明表面结合的供体半体与基于CF-异恶唑酮的受体半体之间的反应是成功的。然而，紫外-可见光谱测量表明，表面形成了一种不可逆的、含环戊烯酮的闭合开关结构。对表面润湿性的分析表明，水会自发铺展，这可能与闭合异构体的构象变化有关。
