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- W4254405188 abstract "<div> <p><b>Through in-situ, high-pressure x-ray diffraction experiments we have shown that the homoleptic perovskite-like coordination polymer [(CH<sub>3</sub>)<sub>2</sub>NH<sub>2</sub>]Cu(HCOO)<sub>3</sub> undergoes a pressure-induced orbital reordering phase transition above 5.20 GPa. This transition is distinct from previously reported Jahn-Teller switching in coordination polymers, which required at least two different ligands that crystallize in a reverse spectrochemical series. We show that the orbital reordering phase transition in [(CH<sub>3</sub>)<sub>2</sub>NH<sub>2</sub>]Cu(HCOO)<sub>3</sub> is instead primarily driven by unconventional octahedral tilts and shifts in the framework, and/or a reconfiguration of A-site cation ordering. These structural instabilities are unique to the coordination polymer perovskites, and may form the basis for undiscovered orbital reorientation phenomena</b><b> in this broad family of materials.</b><b></b></p> </div> <b><br></b>" @default.
- W4254405188 created "2022-05-12" @default.
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- W4254405188 date "2021-04-23" @default.
- W4254405188 modified "2023-10-18" @default.
- W4254405188 title "Pressure-Induced Jahn-Teller Switch in the Homoleptic Hybrid Perovskite [(CH3)2NH2]Cu(HCOO)3: Orbital Reordering by Unconventional Degrees of Freedom" @default.
- W4254405188 doi "https://doi.org/10.26434/chemrxiv.14465379" @default.
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