Structure and Fluorescence Properties of a Two-Dimensional Zinc(II) Coordination Polymer Containing Isophthalate

Abstract

A new coordination polymer formulated as [Zn(L)(1,3-BDC)] (L = 1,3-bis-(benzimidazole-1-ylmethylene)-benzene, 1,3-H₂BDC = isophthalic acid) is hydrothermally synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction analysis. It crystallizes in the monoclinic space group P2₁/n, a = 10.179(3) Å, b = 10.510(3) Å, c = 23.217(6) Å, α = 90, β = 91.983(3), γ = 90°, V = 2482.4(11) ų, Z = 4, C₃₀H₂₂N₄O₄Zn, M_r = 567.91, D_c = 1.520 g/cm³, μ = 1.036 mm^–1. The complex exhibits a 2D (4,4) network with the point symbol {4⁴,6²} and further extended into a 3D supramolecular framework through π⋯π stacking interactions between two well-overlapping benzimidazolyl rings of the neighboring L ligands. Furthermore, the thermal stability and fluorescence properties of the complex are investigated.