Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia.
State Key Laboratory of Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
Angew Chem Int Ed Engl. 2023 Apr 24;62(18):e202302448. doi: 10.1002/anie.202302448. Epub 2023 Mar 24.
Flexible metal-organic materials are of growing interest owing to their ability to undergo reversible structural transformations under external stimuli. Here, we report flexible metal-phenolic networks (MPNs) featuring stimuli-responsive behavior to diverse solute guests. The competitive coordination of metal ions to phenolic ligands of multiple coordination sites and solute guests (e.g., glucose) primarily determines the responsive behavior of the MPNs, as revealed experimentally and computationally. Glucose molecules can be embedded into the dynamic MPNs upon mixing, leading to the reconfiguration of the metal-organic networks and thus changes in their physicochemical properties for targeting applications. This study expands the library of stimuli-responsive flexible metal-organic materials and the understanding of intermolecular interactions between metal-organic materials and solute guests, which is essential for the rational design of responsive materials for various applications.
柔性金属有机材料由于其在外力刺激下能够进行可逆结构转变的能力而受到越来越多的关注。在这里，我们报道了具有刺激响应行为的柔性金属酚醛网络（MPN），其能够对不同的溶质客体表现出响应行为。实验和计算表明，金属离子与多配位位点的酚配体和溶质客体（如葡萄糖）的竞争配位主要决定了 MPN 的响应行为。葡萄糖分子可以在混合时嵌入到动态 MPN 中，导致金属有机网络的重新配置，从而改变其物理化学性质，以用于靶向应用。这项研究扩展了刺激响应柔性金属有机材料的库，并加深了对金属有机材料与溶质客体之间分子间相互作用的理解，这对于合理设计用于各种应用的响应材料至关重要。
