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Abstract <p>This study examines the thermal, dielectric, and thermoelectric properties of 2D metal–organic complexes, specifically (CH<sub>2</sub>)<sub>6</sub>(NH<sub>3</sub>)<sub>2</sub>CoCl<sub>4</sub> (HDACoCl<sub>4</sub>) and (CH<sub>2</sub>)<sub>12</sub> (NH<sub>3</sub>)<sub>2</sub>CoCl<sub>4</sub> (DDACoCl<sub>4</sub>). Differential scanning calorimetry thermographs reveal significant thermal events, including phase transitions and structural reorganizations, which directly influence the materials’ dielectric and thermoelectric performance. Notably, (CH<sub>2</sub>)<sub>6</sub>(NH<sub>3</sub>)<sub>2</sub>CoCl<sub>4</sub> undergoes two primary thermal transitions at 410 K and 466 K, demonstrating strong thermal stability. In contrast, (CH<sub>2</sub>)<sub>12</sub>(NH<sub>3</sub>)<sub>2</sub>CoCl<sub>4</sub> exhibits multiple transitions at lower temperatures, attributed to its greater molecular flexibility. Dielectric analysis of (CH<sub>2</sub>)<sub>6</sub>(NH<sub>3</sub>)<sub>2</sub>CoCl<sub>4</sub> reveals peaks at 323 K and 371 K, corresponding to dipolar relaxation and phase transitions. Meanwhile, thermoelectric studies on (CH<sub>2</sub>)<sub>12</sub>(NH<sub>3</sub>)<sub>2</sub>CoCl<sub>4</sub> indicate variable thermoelectric power with multiple inflection points, suggesting dynamic carrier behavior and phase-related transport changes. Compared to conventional materials, these organic-metal complexes offer tunable properties and enhanced potential applications in sensors, energy storage, and flexible electronics. The findings position these materials as promising candidates for advanced electronic and energy-related technologies.</p> Graphical Abstract <p></p>

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Correlating Structural Features and Physical Properties in (CH2)6/12(NH3)2CoCl4 Complexes: A Study of Thermal and Electronic Behaviors

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • A. H. El-Dosokey,
  • Nawal K. Almaymoni,
  • Mohamed R. Eid,
  • Amnah M. Alofi,
  • Abdel-Haleem Abdel-Aty,
  • Hosam M. Gomaa

摘要

Abstract

This study examines the thermal, dielectric, and thermoelectric properties of 2D metal–organic complexes, specifically (CH2)6(NH3)2CoCl4 (HDACoCl4) and (CH2)12 (NH3)2CoCl4 (DDACoCl4). Differential scanning calorimetry thermographs reveal significant thermal events, including phase transitions and structural reorganizations, which directly influence the materials’ dielectric and thermoelectric performance. Notably, (CH2)6(NH3)2CoCl4 undergoes two primary thermal transitions at 410 K and 466 K, demonstrating strong thermal stability. In contrast, (CH2)12(NH3)2CoCl4 exhibits multiple transitions at lower temperatures, attributed to its greater molecular flexibility. Dielectric analysis of (CH2)6(NH3)2CoCl4 reveals peaks at 323 K and 371 K, corresponding to dipolar relaxation and phase transitions. Meanwhile, thermoelectric studies on (CH2)12(NH3)2CoCl4 indicate variable thermoelectric power with multiple inflection points, suggesting dynamic carrier behavior and phase-related transport changes. Compared to conventional materials, these organic-metal complexes offer tunable properties and enhanced potential applications in sensors, energy storage, and flexible electronics. The findings position these materials as promising candidates for advanced electronic and energy-related technologies.

Graphical Abstract