Zn4B3O9C2H8N2: an organic–inorganic hybrid borate with a novel graphene-like layer

Abstract

A new organic–inorganic hybrid zinc borate, Zn₄B₃O₉C₂H₈N₂, has been prepared under hydrothermal conditions, aiming at the formation of an extended coordination polymer with Zn(II) ions. It crystallizes into a monoclinic crystal system with a centrosymmetric space group of P2₁/c with a = 8.398(3) Å, b = 4.9346(18) Å, c = 14.205(4) Å, β = 95.64(2)°, and Z = 2. X-Ray diffraction analyses of available single crystals reveal novel graphene-like ZnBO layers which are connected by the disordered BO₃ and ethylenediamine molecules. Formation of the corresponding zinc borate has been monitored and characterized by chemical and spectroscopic techniques. Characterization using powder X-ray diffraction, infrared spectroscopy, the UV-Vis diffuse reflectance spectrum, and the TG curve is also described.