Construction of a PbII coordination polymer from a   semi-rigid ditopic 2,2-biimidazole derivative: synthesis, crystal structure and characterization

A new PbII coordination polymer, poly[0.75(aqua)[ μ 3-4,4 ′ -(1H,1 ′ H-[2,2 ′ -biimidazole]-1,1 ′ -diyl)dibenzoato- κ 5O,O ′ ;N;O ′ ′ ,O ′ ′ ′ ]]lead(II)] 1.25-hydrate], {[Pb(C20H12N4O4)(H2O)0.75] · 1.25H2O}n or {[Pb(L)(H2O)0.75] · 1.25H2O}n (1) [H2L = 4,4 ′ -(1H,1 ′ H-[2,2 ′ -biimidazole]-1,1 ′ -diyl)dibenzoic acid], was synthesized under solvothermal reaction conditions and characterized using microanalysis, IR spectroscopy and thermogravimetric analysis. Single-crystal structure analysis reveals that a two-dimensional corrugated layer structure is formed in 1 and that neighbouring layers are further extended into a three-dimensional structure by hydrogen-bonding interactions. In addition, a fluorescence sensing experiment towards Cu2+ based on the polymeric PbII complex was carried out.

Source: Acta Crystallographica Section C - June 14, 2023 Category: Chemistry Authors: Liu, X. Cai, H. Zhou, R. Li, Y. Tags: coordination polymer supramolecular network crystal structure fluorescence sensing lead(II) complex 2,2 ′ -biimidazole dibenzoic acid photoluminescence research papers Source Type: research