A meso-one-dimensional coordination polymer based on racemic 2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)benzoic acid: Synthesis, structure and properties

A novel polymeric complex NaCo(o-pba)3(H2O)3 (o-Hpba = 2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)benzonic acid) based on racemic N-arylphthalimidine ligand has been prepared and characterized by elemental analysis, spectroscopic and X-ray crystallography methods. In the compound, each Co(II) cation is coordinated by six O atoms from three carboxyl groups of o-pba− and three water molecules in fac-MA3B3 model forming a chiral tripodal Co(o-pba)3(H2O)3− anion-complex, enantiomeric pairs of which are alternately arranged in head-to-head and tail-to-tail orientations giving rise to a meso-one-dimensional chain-like structure. The compound exhibits high stability and unusual triple-peak luminescence in DMSO solution at room temperature.