Synthesis, 13C NMR-MAS, AC conductivity and structural characterization of [C7H12N2]ZnCl4
摘要:
Synthesis, crystal structure, C-13 CP-MAS-NMR analysis and impedance spectroscopy study are reported for a new organic-inorganic hybrid salt, [C7H12N2][ZnCl4], consisting of one 2,4-diammonium toluene cation and one [ZnCl4](2-) anion. The Zn atom is in a slightly distorted tetrahedra coordination environment. The structure can be described by the alternation of ionic and organic layers. The cohesion of the material is assured by strong charge-assisted N-H center dot center dot center dot Cl interactions established between ammonium groups and discrete [ZnCl4](2-) tetrahedra. Solid state C-13 CP-MAS-NMR spectra show seven isotropic resonances, confirming the existence of seven non-equivalent carbon atoms which are consistent with the solid state structure determined by X-ray diffraction.Impedance spectroscopy study, reported for single crystal and powder samples, reveals that the conduction in the material is due to a hopping process along the [1 0 0] direction. (C) 2010 Published by Elsevier B.V.