A Unique Independent One-Dimensional Green Luminescent Coordination Polymer Nanotube Based on an Unsymmetric Tricarboxylate Linker

A novel independent one-dimensional (1D) coordination polymer nanotube [Cd₃(BPT)₂(phen)₃(H₂O)]·4.5H₂O (CPNT-1, H₃BPT = biphenyl-3,4′,5-tricarboxylic acid; phen = 1,10-phenanthroline) has been synthesized and structurally characterized. CPNT-1 shows a fascinating 1D → 2D interdigitated architecture, and the final three-dimensional supramolecular columnar network was formed via π–π stack interactions between the terminal phen ligands of the coordination polymer nanotubes. Luminescent studies show that CPNT-1 displays strong green emission at room temperature, and the guest water molecules affect its luminescent properties.