Baek Seungjoo, Heo Jung-Moo, Bae Kwangmin, Khazi Mohammed Iqbal, Lee Seongjae, Kim Kyeounghak, Kim Jong-Man
Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea.
Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Korea.
Langmuir. 2024 Aug 12. doi: 10.1021/acs.langmuir.4c02167.
The construction of functional materials via the co-assembly of multimolecular systems has recently emerged as a fascinating topic. The co-assembled multicomponent could promote the evolution of supramolecular assemblies into a high-order nanoarchitecture with improved functional properties. We report the successful preparation of a dual-functional polydiacetylene () having thermochromic and solvatochromic properties via facile co-assembly of and cyanuric acid () followed by ultraviolet-induced polymerization. Molecular packing patterns from powder X-ray diffraction and density functional theory calculations of molecular self-assembly processes confirm highly ordered co-assembled lamellar structures. showed excellent reversible thermochromism properties when the temperature was increased from 30 to 150 °C with a reversible blue-to-red color transition that could be detected by the naked eye. Also, displayed selective blue-to-red solvatochromism against dimethylformamide and dimethyl sulfoxide. Detailed investigations revealed that the enhanced thermochromic reversibility and solvatochromic selectivity could be attributed to the hydrogen-bonding interactions and the formation of a network structure in the /cyanuric acid co-assembly. Our research opens a promising route for improving the performance of functional materials via noncovalent multicomponent arrangements at the molecular level.
通过多分子体系的共组装构建功能材料最近已成为一个引人入胜的课题。共组装的多组分体系能够促进超分子组装体演变成具有改进功能特性的高阶纳米结构。我们报道了通过10,12-二十五碳二炔酸（PDDA）与氰尿酸（CA）的简便共组装，随后进行紫外光诱导聚合，成功制备出具有热致变色和溶剂致变色特性的双功能聚二乙炔（PDA）。粉末X射线衍射的分子堆积模式以及分子自组装过程的密度泛函理论计算证实了高度有序的共组装层状结构。当温度从30℃升高到150℃时，PDA表现出优异的可逆热致变色特性，具有肉眼可检测到的从蓝色到红色的可逆颜色转变。此外，PDA对二甲基甲酰胺和二甲基亚砜表现出选择性的从蓝色到红色的溶剂致变色。详细研究表明，热致变色可逆性和溶剂致变色选择性的增强可归因于氢键相互作用以及PDDA/氰尿酸共组装中网络结构的形成。我们的研究为通过分子水平的非共价多组分排列来改善功能材料的性能开辟了一条有前景的途径。
