A new one-dimensional hybrid material lattice: AC conductivity and structural characterization of [C7H12N2][CdCl4]

Adel Jarboui, Abderrazek Ousleti, Karim Adil, Kamel Guidara, Faouzi Hlel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The present paper reports the synthesis, crystal structure, 13C and 111Cd cross-polarization magic-angle spinning nuclear magnetic resonance(CP-MAS-NMR) analysis and ac conductivity for a new organic-inorganic hybrid salt, [C7H12N2][CdCl4]. The compound crystallizes in the triclinic system, space group P1, with unit cell dimensions: a = 7.1050(3) Å, b = 8.9579(3) Å, c = 9.4482(3) Å, α = 81.415(1)°, β = 89.710(2)°, γ = 85.765(1)°, V = 592.97(4) Å3, and Z = 2. The asymmetric unit is composed of one-2,4-diammonium toluene cation and one [CdCl4]2- anion. The Cd atom is in a slightly distorted octahedra coordination environment. Its structure can be described by infinite chains of CdCl6 octahedron linked to organic cations by a strong charge-assisted N-H{bullet operator}{bullet operator}{bullet operator}Cl interactions in order to build organic-inorganic layers staked along [011] direction. The solid state 13C CP-MAS-NMR spectra has shown seven isotropic resonances, confirming the existence of seven non-equivalent carbon atoms, which is consistent with crystal structure determined by X-ray diffraction. As for 111Cd MAS-NMR, it has shown one cadmium site with isotropic chemical shift observed at 167. 2 ppm. The complex impedance of the compound has been investigated in the temperature range of 403-460 K and in the frequency range of 200 Hz-5 MHz. The impedance plots have shown semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. The circuits consist of the parallel combination of bulk resistance Rp and constant phase elements.

Original languageEnglish (US)
Pages (from-to)145-155
Number of pages11
JournalIonics
Volume17
Issue number2
DOIs
StatePublished - Mar 1 2011

Keywords

  • Electrical properties
  • Hybrids material
  • Impedance spectroscopy
  • Nuclear magnetic resonance (NMR)
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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