A new ladder-type silver(I) coordination polymer with 4,4'-bipyridine and 4-[(4-carboxybenzyloxy)methyl]benzoate ligands: synthesis, crystal structure, fluorescence properties and Hirshfeld surface analysis.

A novel ladder-type coordination polymer (CP), poly(μ-4,4'-bipyridine-κN:N'){μ-4-[(4-carboxybenzyloxy)methyl]benzoato-κO}silver(I), [Ag(CHO)(CHN)] or [Ag(HL)(4,4'-bpy)] {HL is 4,4'-[oxybis(methylene)]dibenzoic acid and 4,4'-bpy is 4,4'-bipyridine}, was synthesized using hydrothermal methods. The complex was characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction, and is a ladder-type CP which exhibits an obvious Ag-Ag interaction. The legs of the ladder are formed by parallel 4,4'-bipy ligands and silver ions, and the rungs are constructed by Ag-Ag interactions. A Hirshfeld surface analysis was carried out and is discussed in detail. The complex also displays favourable fluorescence properties.