Synthesis, crystal structure, vibrational properties and dielectric properties of 1-(2-ammonium-ethyl) pipérazindiium hexachlorobismuthate(III)

Raman scattering and alternative current conduction mechanism of the high‐temperature phase transition in [(C4H9)4N]3Bi2Cl9

“…The assignments of the Raman bands of [(C 4 H 9 ) 4 N] 3 Bi 2 Cl 9 compound at room temperature realized by comparison with similar compounds is summarized in Table S1 …”

“…The assignments of the Raman bands of [(C 4 H 9 ) 4 N] 3 Bi 2 Cl 9 compound at room temperature realized by comparison with similar compounds is summarized in Table S1. [1,[19][20][21][22][23] It is obvious that the 170-to 300-cm À1 region correspond to the vibration modes of [Bi 2 Cl 9 ] 3À anions. On the other hand, the bands observed above 300 cm À1 arises from the internal modes of the [(C 4 H 9 ) 4 N] + cations.…”

Synthesis, crystal structure, thermal analysis and dielectric properties of [(C4H9)4N]3Bi2Cl9 compound

“…4(a) and (b). A detailed assignment of the most important band realized by comparison with similar compounds is listed in Table 5 [33][34][35][36][37][38][39][40][41].…”

Synthesis, crystal structure, thermal analysis, and electrical properties of bis tetrapropylammonium hexachloro-dizincate compound

“…The obtained activation energy is E a1 =0.69 eV in phase I and E a2 =0.96 eV in phase II. The differences can be due to the high displacement of the ammonium proton caused by the cell deformation introduced with the establishment of a non-polar phase, that is to say, the existence of a paraelectric phase at room temperature in the compound [29]. The anomaly is characterized by a sharp increase in the conductivity values, so the conductivity increases from σ=2.2610 −7 (Ω cm) −1 at 303 K to σ=1.6510 −6 (Ω cm) −1 at 327 K for the first region, and from σ=2.6010 −6 (Ω cm) −1 at 333 K to σ=1.3910 −4 (Ω cm) −1 at 403 K for the second one.…”

“…A change in the slope of the curve was observed at around T=327±(5)K which is close to the temperature of the transition detected by DSC and electric measurement. The ionic conductivity here is considered to be induced by the reorientation of the tetra-ammonium alkyl chains [29] …”