Polyrotaxane-like and Interpenetrating Metal−Organic Frameworks (MOFs) Constructed from Biphenyl-4,4′-Dicarboxylate and Bis(imidazole) Ligand

The paper presents three interesting entanglement systems, including two polyrotaxane-like and one interpenetrating frameworks, namely, [Co(L1)(bpdc)] (1), [Co(L2)(bpdc)] (2), and [Co(L3)1.5(bpdc)(H2O)]·(L3) (3), constructed from biphenyl-4,4′-dicarboxylate and bis(imidazole) ligands (L1 = 1,6-bis(imidazol-1-yl)-hexane, and rods that are interlaced in a parallel fashion to result in 2D → 2D polyrotaxane-like motifs (L2 = 1,4-bis(imidazol-1-ylmethyl)benzene and L3 = 1,4-bis(1-imidazolyl)-benzene)). Both compounds 1 and 2 contain loops. Compound 3 represents the first example of a triply interpenetrated 5-connected 4466 topology network.

该论文介绍了三种引人入胜的纠缠体系，包括两种类似聚轮烷的和一种穿插框架，具体为[Co(L1)(bpdc)] (1)、[Co(L2)(bpdc)] (2)以及[Co(L3)1.5(bpdc)(H2O)]·(L3) (3)，这些体系由双苯-4,4'-二羧酸酯和双(咪唑)配体（L1 = 1,6-双(咪唑-1-基)-己烷，以及相互交织成平行排列的棒状物，从而形成二维到二维的聚轮烷类似图案；L2 = 1,4-双(咪唑-1-基甲基)苯和L3 = 1,4-双(1-咪唑基)-苯）构建而成。化合物1和2均含有环状结构。化合物3代表了首次出现的具有三重穿插的五连接4466拓扑网络结构的实例。