From 1D to 2D Cd(II) and Zn(II) Coordination Networks by Replacing Monocarboxylate with Dicarboxylates in Partnership with Azine Ligands: Synthesis, Crystal Structures, Inclusion, and Emission Properties.

Eight mixed-ligand coordination networks, [Cd(2-aba)(NO)(4-bphz)]·n(dmf) (), [Cd(2-aba)(4-bphz)]·0.75n(dmf) (), [Cd(seb)(4-bphz)]·n(HO) (), [Cd(seb)(4-bpmhz)]·n(HO) (), [Cd(hpa)(3-bphz)] (), [Zn(1,3-bdc)(3-bpmhz)]·n(MeOH) (), [Cd(1,3-bdc)(3-bpmhz)] ·0.5n(HO)·0.5n(EtOH) (), and [Cd(NO)(3-bphz)(bpe)]·n(3-bphz) () were obtained by interplay of cadmium nitrate tetrahydrate or zinc nitrate hexahydrate with 2-aminobenzenecarboxylic acid (H(2-aba)), three dicarboxylic acids, sebacic (decanedioic acid, Hseb), homophthalic (2-(carboxymethyl)benzoic acid, Hhpa), isophthalic (1,3-benzenedicarboxylic acid, H(1,3-bdc)) acids, bis(4-pyridyl)ethane (bpe) and with four azine ligands, 1,2-bis(pyridin-4-ylmethylene)hydrazine (4-bphz), 1,2-bis(1-(pyridin-4-yl)ethylidene) hydrazine (4-bpmhz), 1,2-bis(pyridin-3-ylmethylene)hydrazine (3-bphz), and 1,2-bis(1-(pyridin-3-yl) ethylidene)hydrazine (3-bpmhz). Compounds and are 1D coordination polymers, while compounds - are 2D coordination polymers. All compounds were characterized by spectroscopic and X-ray diffraction methods of analysis. The solvent uptakes and stabilities to the guest evacuation were studied and compared for 1D and 2D coordination networks. The de-solvated forms revealed a significant increase of emission in comparison with the as-synthesized crystals.