Synthesis, crystal structures and catalytic properties of two 1D cobalt(II) coordination polymers

Abstract

Two new cobalt(II) coordination polymers, namely [Co 1.5 (PhCOO) 3 (bbbm) 1.5 (H 2 O)] n (1) and [Co(chdc)-(bbbm)] n (2) (bbbm = 1,1 0 -(1,4-butanediyl)bis-1H-benzimidazole, H 2 chdc = 1,4-cyclohexanedicarboxylic acid), have been synthesized and structurally characterized by single crystal X-ray diffraction. The cobalt(II) centers display different environments, with trigonal-bipyramidal and octahedral geometries in 1 and a tetrahedral geometry in 2. The 1D linear chains of complex 1 and ladder-like chains of complex 2 are bridged by bbbm in bis-monodentate coordination mode; the variation of the carboxylate co-ligand effectively tunes the resulting framework architecture. The degradation of methyl orange in a photochemical Fenton-like process using complexes 1 and 2 as catalysts was investigated.

Immobilised Co(II) Homodinuclear Coordinative Compound with Terephthalate and o-phenanthroline as Ligands: Synthesis, Crystal Structure and Applications

“…[1,2] The possibility of using these classes of compounds in various fields, with practical applications such as molecular magnets, host materials like zeolites, gas storage, catalysts, materials for nonlinear optics, luminescent materials has led to the synthesis of a wide range of coordinative compounds of transition metal with different ligands. [3] A suitable example of such ligand in order to obtain the compounds from this class is the terephthalate anion, C8H4O4 2− .…”