Assembly of a Cluster-Based Coordination Polymer from a Linear Trimetallic Building Block Surrounded by Flexible Hingelike Ligands

A linear trimetallic cluster {[Cd3(bhnq)3(H2O)2](DMF)(H2O)3}n (1) has been synthesized from Cd(II) salts and a flexible hingelike ligand, 2,2′-bis(3-hydroxy-1,4-naphthoquinone). Sequential assembly of the linear trimetallic cluster as a new controlled second building unit with rigid covalent linker resulted in a one-dimensional hybrid cluster-based coordination polymer, {[Cd3(bhnq)3(4,4′-bipy)](DMF)(H2O)3}n 2, which is further assembled into a three-dimensional supramolecular framework with cavities via self-complementary π−π interactions.