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Some aspects of dimensionality and phase transitions of organic–inorganic hybrid perovskite (n-C14H29NH3)2ZnCl4

Abdelkader, M. M. ; Gamal, W. M.

Applied physics. A, Materials science & processing, 2017-03, Vol.123 (3), p.1-14, Article 153 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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  • Título:
    Some aspects of dimensionality and phase transitions of organic–inorganic hybrid perovskite (n-C14H29NH3)2ZnCl4
  • Autor: Abdelkader, M. M. ; Gamal, W. M.
  • Assuntos: Characterization and Evaluation of Materials ; Charge density ; Condensed Matter Physics ; Coordination compounds ; Crystallization ; Differential thermal analysis ; Hydrogen bonding ; Intercalation ; Interlayers ; Machines ; Manufacturing ; Metal halides ; Nanotechnology ; Optical and Electronic Materials ; Perovskites ; Phase transitions ; Physics ; Physics and Astronomy ; Processes ; Surfaces and Interfaces ; Thin Films
  • É parte de: Applied physics. A, Materials science & processing, 2017-03, Vol.123 (3), p.1-14, Article 153
  • Descrição: The differential scanning calorimetery and the differential thermal analysis thermograms were performed over a suitable wide range of temperatures on polycrystalline samples of the titled hybrid. Furthermore, the ac conductivity σ ac (ῳ, T ) and the complex dielectric permittivity ε * (ῳ, T ) as function of temperature 120 K <  T  < 400 K and some selected frequencies in the range 1 kHz ≤  f  ≤ 100 kHz were measured and presented. The combination of the measured parameters confirms, without any doubt, the existence of a first-order reversible solid–solid structural phase transition from intercalation to non-intercalation, at T  ≈ 368 K accompanied by a sudden increase of the interlayer spacing by ≈17.5%. The analysis of our data is based on the coordination complex and the dimensionality of the central metal halide arrangements, which, in our case, is isolated square [ZnCl 4 ] −2 tetrahedral coordination and, hence, of zero-dimensionality (0D), but stabilized in a two-dimensional structure through charge-assisted hydrogen-bonding system. The zero-dimensionality results in a large charge density and, hence, of high efficiently packed compared with other hybrids of this series which are usually crystallized in two-dimensional (2D) corner-sharing [MCl 6 ] −2 . The rule of hydrogen bonding has been considered. The odd–even effects were given.
  • Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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