Crystal structure and electrical conductivity of imidazolium succinate

Pogorzelec‐Glaser, Katarzyna; Pawlaczyk, Cz.; Pietraszko, A.; Markiewicz, Ewa

doi:10.1016/j.jpowsour.2007.05.067

Cited by 31 publications

(43 citation statements)

References 7 publications

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“…1. The estimated energy values of conductivity process (below T = 293 K) are close to those obtained from the dielectric relaxation studies of ICB performed by Piecha et al [9] as well as to that reported so far for other imidazolium salts [13][14][15]. Above T = 293 K, the estimated activation energy of the conduction is very low and reaches E a = 0.14 eV, which is typical of superprotonic sulphates and selenates in the high conduction phase [12].…”

Section: Resultssupporting

confidence: 89%

Molecular dynamics and electrical conductivity of (C3N2H5)5Bi2Cl11

Zdanowska-Fra̧czek¹,

Hołderna-Natkaniec²,

Frączek³

et al. 2009

Solid State Ionics

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Section: Resultssupporting

confidence: 89%

Molecular dynamics and electrical conductivity of (C3N2H5)5Bi2Cl11

Zdanowska-Fra̧czek¹,

Hołderna-Natkaniec²,

Frączek³

et al. 2009

Solid State Ionics

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“…Results of structural and conductivity investigations for imidazole [19,20] and 2-methylimidazole [21] salts have been already published. Also, the details of experimental techniques are described there.…”

Section: 2mentioning

confidence: 99%

Anhydrous proton conductors for use as solid electrolytes

et al. 2010

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Anhydrous proton conductors in which proton transport proceeds via structure diffusion are interesting alternatives for membrane materials in hydrogen/air fuel cells. Understanding the mechanism of proton diffusion in candidate materials is necessary to improve their performance. We present the results of our studies of two classes of proton conductors in which conductivity does not rely on the presence of water molecules in their structure: crystalline hydrogen sulphates and selenates and new salts of nitrogen-containing heterocyclic molecules combined with a series of dicarboxylic acids. In the former group, superprotonic conductivity results from a high molecular dynamics of S/SeO 4 groups, which creates an excess of structurally equivalent positions for protons. Ferroelastic properties of the crystals determine their physical behaviour at high temperatures. In particular, ferroelasticity makes a smooth and reversible character of superionic phase transition possible. In the second group of materials, the heterocycles exhibit extensive specific interactions that result in a fluctuating network of H-bonds. Thus, the proton conduction in these materials depends on the number of protons, which can be involved in the diffusion and on the fluctuation rate of the hydrogen bond network.

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“…14 The pyrazole molecule, like other nitrogen-containing heterocycles (triazole, imidazole, benzimidazole), crystallizes in layer crystal structures held together by a hydrogen bond network, where protons can easily migrate through the crystal within the layers. [15][16][17][18][19][20][21][22] In the case of proton conductors, several proton diffusion mechanisms such as the Grotthuss process, the translocation mechanism, the vehicle mechanism, proton tunneling, and the solitonic mechanism have been proposed to explain the conducting properties. 23,24 The present study was carried out to provide detailed structural, electrical, and optical properties of this new proton conducting material.…”

Section: Introductionmentioning

confidence: 99%

Order–disorder phase transition in an anhydrous pyrazole-based proton conductor: the enhancement of electrical transport properties

Widelicka

Pogorzelec‐Glaser

Pietraszko

et al. 2017

Phys. Chem. Chem. Phys.

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The crystal structure of 1H-pyrazol-2-ium hydrogen oxalate has been studied at 100 K. It consists of two-dimensional layers built with one-dimensional chains that contain pyrazolium and oxalate acids bonded by N-HO and O-HO hydrogen bonds. According to the X-ray data and the Quantum Theory of Atoms in Molecules, it was shown that weak and moderate hydrogen bonds are present in the crystal at room temperature. The thermal stability was studied with the DSC, TGA, and DTG methods: three endothermic peaks are observed at 384, 420, and 469 K. Conductivity measurements have been performed in the temperature range from 300 to 433 K. At 383 K the pyrazole-oxalic acid framework loses its rigidity and the crystal undergoes an ordered-disordered phase transition. At this temperature, the value of the activation energy of proton conductivity changes from 1.14 to 2.31 eV. The proton conduction pathways and the transport mechanism have been studied with theoretical methods.

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Crystal structure and electrical conductivity of imidazolium succinate

Cited by 31 publications

References 7 publications

Molecular dynamics and electrical conductivity of (C3N2H5)5Bi2Cl11

Molecular dynamics and electrical conductivity of (C3N2H5)5Bi2Cl11

Anhydrous proton conductors for use as solid electrolytes

Order–disorder phase transition in an anhydrous pyrazole-based proton conductor: the enhancement of electrical transport properties

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