Hierarchical formation of one-dimensional supramolecular structure via stacking or coordination of hydrogen-bonded inorganic-organic hybrid pairs

化学的目标之一是材料的分子设计，以实现特定或多功能特性。非常成功的方法是分子结构和晶体工程。在这两个领域中，金属离子与有机配体的组合在构建金属有机框架（MOFs）方面显示出非常富有成效的效果，这些金属有机框架具有吸引力的空间，用于诸如化学吸附、气体储存、催化、磁性、导电性和发光性质等功能。然而，用于特定应用的MOF的合理设计和制备仍处于发展阶段。因此，需要做大量的工作来找出相关的结构类型，并寻找能够控制结构的多功能配体进行合理的合成。在本研究中，同时使用多齿配体H_2 tdpd和桥联配体吡嗪及4，4 ′-联吡啶与钴（II）和锌（II）离子反应，得到了三种有趣的多级聚合物结构：一维梯形链化合物和两种一维链状化合物。这些结构表明，金属离子和溶剂分子在构建配位聚合物中起着重要的作用。

One of the goals of chemistry is the molecular design of materials to achieve specific or multifunctional properties. Very successful approaches are molecular architecture and crystal engineering. Within these two fields, a combination of metal ions with organic ligands was shown to be very fruitful in building metal-organic frameworks (MOFs) that possess attractive space for functions such as chemisorption, gas storage, catalysis, magnetism, conductivity and luminescence properties. However, the rational design and preparation of MOFs for specific applications are still at an evolutionary stage. Therefore, much work is required to figure out the relevant structural types and to seek versatile ligands that are able to control structure for rational synthesis. In this study, Simultaneous use of the multidentate ligand H2tdpd and bridging ligand pyrazine and 4,4’-bipyridine for the reaction with cobalt(II) and zinc(II) ions affords three interesting hierarchical polymeric architectures: 1D ladder chain compound and two kinds of 1D chain compounds. These obtained structures show that the metal ions and the solvent molecules play important roles to construct coordination polymers.