One-dimensional Cobalt(II) and zinc(II) succinato coordination polymers with nicotinamide: Synthesis, structural, spectroscopic, fluorescent and thermal properties

Abstract

Cobalt(II) and zinc(II) succinato (suc) coordination polymers with nicotinamide (nia), {[Co(?-suc)(H 2O) 2(nia) 2] · 2H 2O} n (1) and {[Zn(?-suc)(H 2O) 2(nia) 2] · 2H 2O} n (2) have been synthesized and characterized by elemental analyses, magnetic moments, IR and TG-DTA. Single-crystal X-ray analyses of 1 and 2 reveal that these complexes are isostructural and crystallize in triclinic space group Complexes 1 and 2 are 1-D coordination polymers, in which the metal(II) ions exhibit an octahedral geometry with two suc, two nia and two aqua ligands. The nia ligand is N-bonded, while the suc ligand bridges the metal centers through the carboxylate groups. The 1D chains are further assembled to form 3D networks by strong N-H···O and OW-H···O hydrogen bonds. IR spectra confirm the coordination modes of both suc and nia ligands, while TG-DTA data are in agreement with the crystal structures. Fluorescent analysis in the solid state shows that all complexes display intraligand (?-?*) emissions of nia. © Springer Science+Business Media, LLC 2009.