Synthesis, Structure, and Characterization of a New Metal-Organic Framework containing Meso-Helices

The new metal-organic framework [Cd(bqdc)(phen)]n (1) (bqdc = 2, 2-biquinoline-4, 4-dicarboxylate, phen = 1, 10-phenanthroline) was hydrothermally synthesized by hetero-ring carboxylate ligand and N-containing auxiliary ligand. The structure of 1 was determined by single-crystal X-ray diffraction analysis and further characterized by elemental analyses, IR spectroscopy, X-ray powder diffraction, and TG analysis. Single-crystal X-ray structural analysis shows that complex 1 is an infinite two-dimensional framework containing aesthetic meso-helix. These two-dimensional coordination networks are interconnected through aromatic stacking and CH center dot center dot center dot O hydrogen bonding interactions to afford a 6-connected (412.63) three-dimensional supramolecular architecture. Furthermore, the photoluminescent property of complex 1 was studied.