Crystal structure, optical characterization, conduction and relaxation mechanisms of a new hybrid compound (C6H9N2)2[Sb2Cl8]

I. Chaabane; W. Rekik; H. Ghalla; M. Zaghrioui; J. Lhoste; A. Oueslati

doi:10.1039/D3RA08885E

Crystal structure, optical characterization, conduction and relaxation mechanisms of a new hybrid compound (C₆H₉N₂)₂[Sb₂Cl₈]†

I. Chaabane,^a W. Rekik,^b H. Ghalla,^c M. Zaghrioui,^d J. Lhoste

^e and A. Oueslati

*^a

Author affiliations

* Corresponding authors

^a Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax, B.P. 1171, 3000 Sfax, Tunisia
E-mail: oueslatiabderrazek@yahoo.fr

^b Laboratory Physical-Chemistry of Solid State, Chemistry Department, Faculty of Sciences of Sfax, University of Sfax, BP 1171, Sfax, Tunisia

^c Quantum and Statistical Physics Laboratory, Faculty of Sciences, University of Monastir, Monastir 5079, Tunisia

^d Université de Tours, Laboratoire GREMAN UMR-CNRS 7347, 15 rue de la Chocolaterie, IUT de Blois, 41029 Blois cedex, France

^e Institut des Molécules et Matériaux du Mans (IMMM), UMR-6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France

Abstract

Hybrid materials play a crucial role in the construction of flexible electronic devices due to the advantages of both organic and inorganic components. To this end, a new hybrid compound (C₆H₉N₂)₂[Sb₂Cl₈] was successfully fabricated using the slow evaporation solution growth approach at room temperature. In-depth research has been done on the structural, optical, and dielectric characteristics. This compound adopts the triclinic symmetry and crystallizes in the centrosymmetric space group P [1 with combining macron] . The inorganic and organic components respectively form anionic and cationic layers parallel to the ac-plane and alternate along the crystallographic b-axis. The [Sb₂Cl₈]²⁻ dimeric units are bound to the 2-amino-5-picolinium cations [(C₆H₉N₂)]⁺ through N–H⋯Cl hydrogen bonds. Optical absorption measurements showed a semiconductor behavior with a band gap of approximately 3.57 eV. In addition, DFT calculations were performed to investigate the absorption spectrum, wavelength, and HOMO–LUMO gap. The analysis of complex impedance spectra shows that the electrical conductivity of the sample is strongly frequency and temperature dependent, indicating a relaxation phenomenon and semiconductor-type behavior. Dielectric data obtained from complex impedance spectroscopy and ac conductivity with the use of the Maxwell–Wagner equivalent circuit model, and the universal power law have been investigated to explore the basic components of the electronic transport and relaxation process in our material.

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Article information

DOI: https://doi.org/10.1039/D3RA08885E
Article type: Paper
Submitted: 27 Dec 2023
Accepted: 16 Jan 2024
First published: 23 Jan 2024
This article is Open Access

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RSC Adv., 2024,14, 3588-3598

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Crystal structure, optical characterization, conduction and relaxation mechanisms of a new hybrid compound (C₆H₉N₂)₂[Sb₂Cl₈]

I. Chaabane, W. Rekik, H. Ghalla, M. Zaghrioui, J. Lhoste and A. Oueslati, RSC Adv., 2024, 14, 3588 DOI: 10.1039/D3RA08885E

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