Structural Features in Some Layered Hybrid Copper Chloride Perovskites: ACuCl4 or A2CuCl4
Ceng Han1, Alasdair J Bradford1,2, Alexandra M Z Slawin1
1School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom.
Inorganic Chemistry
|July 9, 2021
Summary
Three new hybrid copper(II) chloride layered perovskites were synthesized, exhibiting distinct structures and thermal properties. Variable-temperature synchrotron X-ray powder diffraction revealed significant thermal contraction in one material, suggesting potential applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Layered perovskites are a versatile class of materials with tunable properties.
- Hybrid organic-inorganic perovskites offer unique structural and functional characteristics.
- Copper(II) chloride compounds are of interest for their magnetic and structural behaviors.
Purpose of the Study:
- To synthesize and characterize novel hybrid copper(II) chloride layered perovskites.
- To investigate their crystal structures and structural dynamics.
- To explore their magnetic properties.
Main Methods:
- Single-crystal and powder X-ray diffraction (XRD) at variable temperatures.
- Synchrotron X-ray powder diffraction (SXRD).
- Preliminary magnetic susceptibility measurements.
Main Results:
- Three new hybrid copper(II) chloride layered perovskites (ACuCl4 or A2CuCl4) were identified with distinct structure types.
- (m-PdH2)CuCl4 exhibited significant axial thermal contraction upon heating, attributed to interlayer block contraction.
- (3-AbaH)2CuCl4 and (4-AbaH)2CuCl4 adopted different structures, with (3-AbaH)2CuCl4 showing static disorder.
Conclusions:
- The structural diversity of these hybrid perovskites is influenced by the organic templating species.
- The observed thermal contraction in (m-PdH2)CuCl4 highlights unique structural responses to temperature.
- Preliminary magnetic data suggest dominant ferromagnetic interactions in these novel materials.
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