Moreno-Alcántar Guillermo, Aliprandi Alessandro, Rouquette Remi, Pesce Luca, Wurst Klaus, Perego Claudio, Brüggeller Peter, Pavan Giovanni M, De Cola Luisa
Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67083, Strasbourg, France.
Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, via Cantonale 2c, 6928, Manno, Switzerland.
Angew Chem Int Ed Engl. 2021 Mar 1;60(10):5407-5413. doi: 10.1002/anie.202013474. Epub 2021 Jan 21.
Self-assembly relies on the ability of smaller and discrete entities to spontaneously arrange into more organized systems by means of the structure-encoded information. Herein, we show that the design of the media can play a role even more important than the chemical design. The media not only determines the self-assembly pathway at a single-component level, but in a very narrow solvent composition, a supramolecular homo-aggregate can be non-covalently wrapped by a second component that possesses a different crystal lattice. Such a process has been followed in real time by confocal microscopy thanks to the different emission colors of the aggregates formed by two isolated Pt complexes. This coating is reversible and controlled by the media composition. Single-crystal X-ray diffraction and molecular simulations based on coarse-grained (CG) models allowed the understanding of the properties displayed by the different aggregates. Such findings could result in a new method to construct hierarchical supramolecular structures.
自组装依赖于较小的离散实体通过结构编码信息自发排列成更有组织系统的能力。在此，我们表明介质的设计所起的作用甚至比化学设计更为重要。介质不仅在单一组分水平上决定自组装途径，而且在非常狭窄的溶剂组成范围内，一种超分子均聚物可以被具有不同晶格的第二种组分非共价包裹。由于两种分离的铂配合物形成的聚集体具有不同的发射颜色，共聚焦显微镜能够实时跟踪这样一个过程。这种包覆是可逆的，并受介质组成的控制。单晶X射线衍射和基于粗粒化（CG）模型的分子模拟有助于理解不同聚集体所表现出的性质。这些发现可能会产生一种构建分层超分子结构的新方法。
