Design And Assembly Of Coordination Polymers Using Nitrogen-Containing Heterocyclic Ligands

Coordination polymers, especially chiral coordination polymers, arecurrently attracting extensive interest due to their potential applications incatalysis, adsorption, guest exchange, sensor, photonics and electronics.Herein, four achiral rigid nitrogen-containing ligands have been synthesizedand used to build a series of coordination polymers. The as-synthesizedcompounds were characterized by elemental analysis and single-crystalX-ray diffraction.Three achiral dipyridyl-functionalized 1,2,4-oxadiazole ligands L¹-L³and a rigid tetra-4-imidazol-functionalized tetraphenylmethane ligand L⁴were designed and synthesized. L¹-L³ were used to construct ten supermolecularcomplexes 1-10 with different metal salts, such as Ag⁺, Cd²⁺, Ni²⁺,Zn²⁺, Cu²⁺ and so on. The crystal structures were investigated by X-raydiffraction analysis in detail. And the results indicated that the coordinationgeometry preferred by the metal ions, the counter anions, and the weakinteractions, such as the hydrogen bonding andÏ€-Ï€interactions, paly animportant role in determining the topologies of the stable multi-networks.