Syntheses, Structures, and Properties of Two Cobalt(Ⅱ)Coordination Complexes Based on (Fluorene-9,9-diyl)dipropanoic Acid and 1,3-Bis(imidazol-1-yl)butane Ligands

摘要

Two new cobalt(Ⅱ) coordination complexes,namely [Co(HL)2(biim)(H2O)2]n·nH2O(1) and [Co(EtL)2(biim)]n·3n(H2O)·2n(EtHL) (2) (H2L =(fluorene-9,9-diyl)dipropanoic acid,biim =1,3-bis(imidazol-1-yl)butane),have been synthesized using the same starting reactants but different solvent medium.The two complexes exhibit distinctly different structures.Compound 1 exhibits a one-dimensional linear chain structure.However,complex 2 reveals a one-dimensional zigzag chain structure.Thermogravimetric analyses (TGA) and luminescent properties of these two complexes have been discussed.