Kurka Dustin W, Niehues Maximilian, Ravoo Bart Jan
Organic Chemistry Institute and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
Langmuir. 2020 Apr 14;36(14):3924-3931. doi: 10.1021/acs.langmuir.9b03891. Epub 2020 Mar 30.
The preparation of colloidal molecules (CMs), that is, clusters of colloids with a defined aggregation number and configuration, is of continued and significant interest in colloid chemistry and materials science and numerous interactions have been utilized to drive their (self-)assembly. However, only very few reports are available on the assembly of CMs based on host-guest chemistry. In this paper, we investigate the assembly of like-charged silica particles into well-defined, core-satellite AB-type CMs in water, mediated by host-guest interactions and geometric constraints. Exploiting the inherent dynamics of noncovalent attraction and making use of a soft polymer shell to enhance multivalent host-guest interactions, we successfully synthesized AB, AB, and AB CMs by selecting the appropriate size ratio of satellite to core particles.
制备胶体分子（CMs），即具有确定聚集数和构型的胶体聚集体，在胶体化学和材料科学中一直备受关注，并且人们利用了多种相互作用来驱动它们的（自）组装。然而，基于主客体化学的CMs组装的报道却非常少。在本文中，我们研究了在水相中，通过主客体相互作用和几何限制，将带相同电荷的二氧化硅颗粒组装成结构明确的核-卫星型AB型CMs。利用非共价吸引力的固有动力学，并使用软聚合物壳增强多价主客体相互作用，我们通过选择合适的卫星颗粒与核心颗粒的尺寸比，成功合成了AB₂、AB₃和AB₄ CMs。
