Structural versus electrical properties of an organic-inorganic hybrid material based on sulfate

A new organo-sulfate compound is obtained by slow evaporation at room temperature and is characterized by powder and single-crystal X-ray diffraction (XRD) at variable temperatures. The benzylammonium monohydrogenosulfate of formula C6H5CH2NH3+. HSO4−, denoted (BAS), crystallizes in the monoclinic system P21/c space group with the following parameters at room temperature: a=5.623(5)Å, b=20.239(5) Å, c=8.188(5)Å, β=94.104(5)°. The crystal structure consists of infinite parallel two-dimensional planes built by HSO4− anions and C6H5CH2NH3+ cations interconnected by strong O–H….. O and N–H….. O hydrogen bonds. A phase transition is detected at 350K by differential scanning calorimetry (DSC) and confirmed by powder XRD. Conductivity measurements using the impedance spectroscopy technique allow to determine the conductivity relaxation parameters associated with the H+ conduction from an analysis of the M”/M”max spectrum measured in a wide temperature range. Transport properties of this material appear to be due to an H+ ion hopping mechanism. The asymmetric unit of C6H5CH2NH3+. HSO4−. [Display omitted] •New hybrid crystal (BAS) was synthesized at room temperature by slow evaporation.•This compound crystallizes in monoclinic P21/c space group.•Electrical measurements proving the good properties of the proton conduction of BAS.