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- W2048604777 abstract "Structural phase transitions in the lipid-like bilayer material [(CH2)12(NH3)2]CuCl4 have been observed using differential thermal scanning. The compound shows an irreversible thermochromic transition at ˜ 465 K and three reversible transitions at T 1 = 433 ± 4 K and T 2 = 411 ± 2 K and T 3 = 358 K. The transition at 350 K is ascribed to chain melting. The other two correspond to crystalline phase transformation. Phase (IV) T3 = 358 ± 2K Phase (III) T2 = 411 ± 2K Phase (II) T1 = 433 ± 4K Phase (I) Dielectric permittivity is studied as a function of temperature in the range 300-440 K and frequency, range (60 Hz-100 kHz). It confirms the observed transitions. The dielectric permittivity reflects rotational and conformational transitions for the compound. The variation of the real part of the conductivity with temperature is thermally activated in the temperature range above 350 K, with frequency-dependent activation energy, the values of activation energy lie in the range of ionic hopping. The dependence of the conductivity on frequency follows the universal power law σ = σ0 + A(T) ω s ( T ) with 0<s<1. Comparison of this material with other members of the series is discussed" @default.
- W2048604777 created "2016-06-24" @default.
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- W2048604777 date "2003-06-01" @default.
- W2048604777 modified "2023-10-02" @default.
- W2048604777 title "Structural Phase Transition and the Dielectric Permittivity of the Model Lipid Bilayer [(CH<sub>2</sub>)<sub>12</sub>(NH<sub>3</sub>)<sub>2</sub>]CuCl<sub>4</sub>" @default.
- W2048604777 doi "https://doi.org/10.1080/0141159021000008990" @default.
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