A New Coordination Polymer of Zn(II)-btc (H3btc = Benzene-1,3,5-tricarboxylic acid) with Protonated Acridine: Synthesis, Crystal Structure and Spectroscopic Properties

摘要

A new Zn(II)-btc coordination polymer 1 (H3btc = benzene-1,3,5-tricarboxylic acid) containing protonated acridines was synthesized by hydrothermal reaction at 165 °C for 3 days and characterized by FT-IR, UV–Vis, Fluorescence, TGA measurements and single-crystal/powder X-ray crystallography. The crystallographic data for 1: monoclinic, P21, a = 11.0100(5), b = 16.7104(7), c = 11.7492(5) Å, β = 98.735(2), V = 2136.56(16) Å3, Z = 4, T = 130(2) K, Dc = 1.572 g cm−3, F(000) = 1036, μ(Mo Kα) = 1.205 mm−1, GOF = 1.005. R 1 = 0.0427, wR 2 = 0.1410 [I 2σ(I)]. Structural analysis also revealed that the btc3− ligands bridge four-coordinate Zn(II) centres to form a 2-D grid-like layer network on the bc plane. The protonated acridines fill up the cavities formed between adjacent layers and combine the 2-D layers to generate a non-interpenetrating 3-D supramolecular framework through the hydrogen bondings and π···π packing interactions. The fluorescence investigation disclosed that 1 shows multiband emissions over a wide range.