BEN RACHED, Asma; GUIONNEAU, Philippe; LEBRAUD, Eric; ELAOUD, Zakaria

doi:10.1016/j.jpcs.2016.09.006

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BEN RACHED, Asma

GUIONNEAU, Philippe
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

LEBRAUD, Eric
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Physics and Chemistry of Solids. 2017, vol. 100, p. 25-32

Elsevier

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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 350 K 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.< Réduire

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

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