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Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
Amantadine-based coordination systems with Co(II) and Zn(II) chlorides
A Ciżman1, D A Kowalska2, M Gusowski1
1Department of Experimental Physics, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland. agnieszka.cizman@pwr.edu.pl.
New hybrid organic-inorganic materials using amantadine cations and metal chloride anions exhibit reversible phase transitions. The metal center influences hydrogen bonding, dielectric properties, and proton conductivity, suggesting potential for switchable electronic devices.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Hybrid organic-inorganic materials offer tunable properties by combining distinct structural and functional components.
- Amantadine-based halometalates are explored for their potential in advanced functional applications.
Purpose of the Study:
- To synthesize and structurally characterize novel hybrid materials based on amantadine and metal chloride anions (Co(II) and Zn(II)).
- To investigate the temperature-dependent phase transitions and their impact on material properties.
Main Methods:
- X-ray diffraction (XRD) and Differential Scanning Calorimetry (DSC) for structural and thermal analysis.
- Dielectric spectroscopy and Cole-Cole analysis to probe electrical relaxation phenomena.
- DC conductivity measurements to study charge transport mechanisms.
Main Results:
- Compounds (C10H18N)2MeCl4 (Me = Co, Zn) exhibit reversible phase transitions from monoclinic to triclinic upon cooling, with significant thermal hysteresis.
- Phase transitions are driven by amantadine cation reorganization and hydrogen-bonding network rearrangements.
- Dielectric anomalies and metal-center-dependent relaxation processes were observed; DC conductivity shows Arrhenius behavior with modified proton-transfer pathways across transitions.
Conclusions:
- The metal center plays a crucial role in tuning hydrogen-bond dynamics, dipolar relaxation, and charge transport in these hybrid materials.
- Amantadine-based halometalates are promising candidates for switchable dielectric and proton-conducting applications.
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