Structural characterization, vibrational and optical properties of a novel one-dimensional organic–inorganic hybrid based-iodobismuthate(III) material, [C10H7NH3]BiI4

The new organic–inorganic hybrid compound [C10H7NH3]BiI4 has been grown by the solvent evaporation method. The one-dimensional (1D) structure for [C10H7NH3]BiI4 has been determined by the single-crystal X-ray diffraction to be orthorhombic, Pbca with a = 15.515(3) Å, b = 7.643(2) Å, c = 29.067(5) Å and Z = 8. The structure consists of corrugated layers of BiI4− chains, with Bi–I bond lengths ranging from 2.9260(2) to 3.2659(2) Å, separated by the organic (C10H7NH3)+ cations. The crystal packing is governed by I⋯I electrostatic interactions forming a self-assembled multiple pseudo-two-dimensional structure. Raman and infrared spectra were used to gain more information of the title compound. An assignment of the observed vibration modes is reported. The optical absorption for thin films of the one-dimensional hybrid has also been investigated, revealing a semiconductive behavior with a characteristic energy of Eg = 2.32 eV.

The structure of the new one-dimensional organic–inorganic hybrid compound [C10H7NH3]BiI4 consists of corrugated layers of BiI4− chains separated by the organic (C10H7NH3)+ cations. The optical properties were investigated by optical absorption measurement.Figure optionsDownload as PowerPoint slideHighlights
► [C10H7NH3]BiI4 is a new one-dimensional material containing low-dimensional iodobismuthates(III) anions.
► The structure consist of corrugated layers of BiI4− chains separated by the organic (C10H7NH3)+ cations.
► The crystal packing is governed by I⋯I electrostatic interactions.
► The vibrational properties of this structure were studied by Raman scattering and infrared spectroscopy.
► The optical absorption for thin films revealing a semiconductive behavior with a characteristic energy of Eg = 2.32 eV.