N-Ligands mediated Co(Ⅱ) coordination polymer incorporating 5-hydroxyisophthalic acid: Syntheses, structures, and theoretical calculations

Abstract

The coordination polymer, [Co(L)(hip)]_n (1), (L = 11-fluoro-pyridine[3,2-a:2',3'-c]phenazine and H₂hip = 5-hydroxyisophthalic acid), has been successfully synthesized under hydrothermal condition. Complex 1 crystallizes in tetragonal, space group P4₃2₁2 and the asymmetric unit consists of one Co(II) ion, one hip^2- anion and one ligand L. The binuclear [Co₂(L)₂(hip)₄]^4- second building unit is formed by the coordination of four different hip^2- anions and two Co(L) moieties. The adjacent Co(Ⅱ) centers are connected by the bridging hip^2- anions to form a one-dimensional helical chain. Finally, a three-dimensional structure is formed by the self-assembly of the coordination bond between the Co centers and the hip^2- anions. The powder X-ray diffraction, thermal analysis, IR analysis, UV-Vis absorption spectrum, photoluminescent properties and theoretical calculation for complex 1 are straight displayed.

KEY WORDS: Co(Ⅱ), 5-hydroxyisophthalic acid, Coordination polymer, Crystal structure

Bull. Chem. Soc. Ethiop. 2024, 38(4), 877-887.                                                   

DOI: https://dx.doi.org/10.4314/bcse.v38i4.5