Plastic crystalline [(C 4 H 9 ) 4 N]FeCl 4 : reversible order–disorder phase transitions and potential for thermal energy storage

RSC Advances 2026 Open access

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Authors: Khawla Ben Brahim, Imen Ibrahmi, Imed Kammoun, Noweir Ahmad Alghamdi, J. P. Bardeau, Gwenaël Corbel, Abderrazek Oueslati
DOI: 10.1039/d5ra09848c
Cited by: 2
References: 38

Abstract

, confirmed the presence of two-phase transitions. The frequency-dependent AC conductivity follows Jonscher's universal power law and is governed by two hopping mechanisms: correlated barrier hopping (CBH) and non-overlapping small polaron tunneling (NSPT). Dielectric measurements further revealed relaxation processes consistent with the dynamic behavior of the cation-anion sublattice. These findings establish this hybrid halogenoferrate as a model system for probing phase-transition mechanisms in plastic crystalline materials and for designing next-generation thermal energy storage devices.

Fields of Study & Subjects

Thermal Expansion and Ionic Conductivity Organic and Molecular Conductors Research Phase Change Materials Research

Publication details

Journal / source
RSC Advances
Publisher
Royal Society of Chemistry (RSC)
Volume
16
Issue
7
Pages
5904–5914
Publication date
1 January 2026
Language
EN