Identification of Reaction Conditions That Can Reproducibly Lead to a Particular Vertex Geometry: Quest for a Robust and Reproducible Metal-Carboxylate Noncluster-type SBU

The present work reports the identification of a robust and reproducible metal-carboxylate noncluster-based secondary building unit (SBU) using flexible ligands, methylenebis(3,5-dimethylpyrazole), and homologous alkanedicarboxylic acids (HOOC-(CH2)n-COOH). We have successfully synthesized a series of zinc(II) coordination polymers using a tailor-made SBU, designed with the proper utilization of the hydrogen bonds of a pyrazole-based ligand. We have identified a clear correlation between the type of auxiliary linker used and the vertex geometry that is present in the resultant network. This, in effect, can pave the way for the strategic control of the vertex geometry, which should enable us to design and predict the topology and dimensionality of a metal−organic framework.

本研究报告了一种基于柔性配体甲基二(3,5-二甲基吡唑)和同系烷二羧酸（HOOC-(CH2)n-COOH）的稳健且可复制的非簇集金属羧酸盐二级构建单元（SBU）。通过巧妙利用基于吡唑的配体的氢键，我们成功合成了一系列锌（II）配位聚合物，并采用定制的SBU进行设计。我们发现了所用辅助连接体类型与所得网络中存在的顶点几何形状之间的明确相关性。实际上，这为顶点几何形状的战略控制开辟了道路，从而应使我们能够设计和预测金属-有机框架的拓扑结构和维度。