Six new coordination polymers based on 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium: Syntheses, crystal structures and properties

Abstract

In this work, we have synthesized six coordination polymers using the organic ligand 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium (H₂L). The compounds, named [Co(L)(H₂O)₂]_n (1), [Co(L)(2,2′-bpy)(H₂O)]_n (2), [Co(L)(4,4′-bpy)_0.5]_n (3), [Mn₂(L)₂(H₂O)₂]_n (4), [Mn(L)(2,2′-bpy)(H₂O)]_n (5) and [Mn(L)(phen)(H₂O)]_n (6), where 2,2′-bpy = 2,2′-bipyridine, 4,4′-bpy = 4,4′-bipyridine and phen = 1,10-phenanthroline, were prepared under hydrothermal conditions and characterized using various physical measurements. The single-crystal X-ray diffraction analyses show that compounds 1–6 possess different structures because of multiple coordination modes and weak interactions. The Hirshfeld surface analyses of compounds 1–6 have also been studied in detail.