ACS Appl Mater Interfaces. 2019 Feb 13;11(6):6404-6410. doi: 10.1021/acsami.8b19988. Epub 2019 Feb 5.
Metal-phenolic networks (MPNs) are an emerging class of functional metal-organic materials with a high degree of modularity in terms of the choice of metal ion, phenolic ligand, and assembly method. Although various applications, including drug delivery, imaging, and catalysis, have been studied with MPNs, in the form of films and capsules, the influence of metals and organic building blocks on their mechanical properties is poorly understood. Herein, we demonstrate that the mechanical properties of MPNs can be tuned through choice of the metal ion and/or phenolic ligand. Specifically, the pH of the metal ion solution and/or size of phenolic ligand influence the Young's modulus ( E) of MPNs (higher pHs and smaller ligands lead to higher E). This study systematically investigates the roles of both metal ions and ligands on the mechanical properties of metal-organic materials and provides new insight into engineering the mechanical properties of coordination films.
金属-酚网络（MPNs）是一类新兴的功能金属有机材料，在金属离子、酚配体和组装方法的选择方面具有高度的模块化。尽管已经研究了 MPNs 在薄膜和胶囊形式下的各种应用，包括药物输送、成像和催化，但对金属和有机构建块对其机械性能的影响知之甚少。在这里，我们证明通过选择金属离子和/或酚配体可以调节 MPNs 的机械性能。具体来说，金属离子溶液的 pH 值和/或酚配体的大小影响 MPNs 的杨氏模量（E）（较高的 pH 值和较小的配体导致较高的 E）。这项研究系统地研究了金属离子和配体对金属有机材料机械性能的作用，并为工程化配位薄膜的机械性能提供了新的见解。
