Department of Chemistry, University of Utah, Salt Lake City, UT 84112.
Proc Natl Acad Sci U S A. 2022 Mar 22;119(12):e2122398119. doi: 10.1073/pnas.2122398119. Epub 2022 Mar 17.
It is well known that chemical compositions and structural arrangements of materials have a great influence on their resultant properties. Diverse functional materials have been constructed by using either biomolecules (peptides, DNA, and RNA) in nature or artificially synthesized molecules (polymers and pillararenes). The relationships between traditional building blocks (such as peptides) have been widely investigated, for example how hydrogen bonds work in the peptide multistage assembly process. However, in contrast to traditional covalent bond-based building blocks-based assembly, suprastructures formed by noncovalent bonds are more influenced by specific bond features, but to date only a few results have been reported based on noncovalent bond-based building block multistage assembly. Here, three metal–organic cycles (MOCs) were used to show how coordination bonds influence the bimetallacycle conformation then lead to the topology differences of MOC multilevel ordered materials. It was found that the coordination linker (isophthalate-Pt-pyridine) is an important factor to tune the shape and size of the MOC-derived suprastructures.
众所周知，材料的化学成分和结构排列对其最终性能有很大影响。通过使用自然界中的生物分子（如肽、DNA 和 RNA）或人工合成分子（聚合物和柱芳烃），已经构建了多种功能材料。人们广泛研究了传统构建块（如肽）之间的关系，例如氢键在肽多级组装过程中的作用。然而，与基于传统共价键的构建块组装相比，由非共价键形成的超结构受特定键特征的影响更大，但迄今为止，仅基于非共价键的构建块多级组装报道了少数结果。在这里，使用了三个金属-有机环（MOC）来展示配位键如何影响双金属环构象，进而导致 MOC 多级有序材料的拓扑差异。研究发现，配位连接体（间苯二甲酸-Pt-吡啶）是调节 MOC 衍生超结构形状和大小的重要因素。
