From molecular to coordination complex: Two new supramolecular networks involving 4,4′-bipy, aminosalicylic acid and Co(II) ions

摘要: Abstract In this work, two new compounds, named (bpy)(Hbpy)+AS−·H2O (1) and [Co(bpy)2(H2O)4]ASCl·3H2O (2) (where bpy is 4,4′-bipyridine, Hbpy the protonated 4,4′-bipyridine AS− aminosalicylate anion), were obtained investigated by single crystal X-ray diffraction vibrational (Raman infrared) spectroscopic techniques. For both complexes existence of supramolecular interactions such as electrostatic, hydrogen bonding, π-stacking C H⋯π was observed. All them responsible for crystalline lattice stability formation a three-dimensional arrangement. compound an interesting bonding interaction observed through cavities, interacting with Hbpy+ cation interaction. The spectra are in good agreement data; infrared spectrum exhibits bands at 1641 1195 cm−1, assigned to O stretching modes anion (carboxyl hydroxyl groups, respectively). Raman 1598 1006 cm−1 refer νCC/νCN νring modes, respectively, cation. (2), it has been 1634 1193 cm−1 referring νO νC anion, whereas 1617 1021 cm−1 concerned 4,4′-bipyridine. successful synthesis characterization these compounds show that mixed ligands can provide multiple structure, use 4-aminosalicylic acid, which act H-donor H-acceptor, contributes features rapidly expanding area chemistry.