Blanke Meik, Postulka Leona, Ciara Isabelle, D'Acierno Francesco, Hildebrandt Marcus, Gutmann Jochen S, Dong Ronald Y, Michal Carl A, Giese Michael
Organic Chemistry, University of Duisburg-Essen, Universitätsstraße 7, 45117 Essen, Germany.
Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC V6T 1Z1, Canada.
ACS Appl Mater Interfaces. 2022 Apr 13;14(14):16755-16763. doi: 10.1021/acsami.2c03241. Epub 2022 Apr 4.
Dynamic covalent bonds bear great potential for the development of adaptive and self-healing materials. Herein, we introduce a versatile concept not only for the design of low-molecular-weight liquid crystals but also for their postsynthetic modification by using the dynamic covalent nature of imine bonds. The methodology allows systematic investigations of structure-property relationships as well as the manipulation of the materials' behavior (liquid crystallinity) and the introduction of additional properties (here, fluorescence) by a solvent-free method. For the first time, the transamination reaction is followed by variable-temperature F solid-state NMR in the mesophase, providing insights into the reaction dynamics in a liquid crystalline material. Finally, the application potential for the design of liquid crystalline materials with adaptive properties is demonstrated by a sequential combination of these reactions.
动态共价键在适应性和自修复材料的开发方面具有巨大潜力。在此，我们引入了一个通用概念，不仅用于设计低分子量液晶，还用于利用亚胺键的动态共价性质对其进行合成后修饰。该方法允许系统地研究结构-性能关系，以及通过无溶剂方法操纵材料的行为（液晶性）并引入其他性能（此处为荧光）。首次在中间相中通过变温F固体核磁共振跟踪转氨反应，从而深入了解液晶材料中的反应动力学。最后，通过这些反应的顺序组合展示了设计具有适应性的液晶材料的应用潜力。
