An Organic–Inorganic Hybrid Semiconducting Quantum Spin Liquid Candidate: (BEDT-TTF)<sub>3</sub>[Cu<sub>2</sub>(μ-C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>·CH<sub>3</sub>CH<sub>2</sub>OH·1.2H<sub>2</sub>O]
The organic–inorganic hybrid (BEDT-TTF)<sub>3</sub>[Cu<sub>2</sub>(μ-C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>·CH<sub>3</sub>CH<sub>2</sub>OH·1.2H<sub>2</sub>O] (<b>I</b>) was obtained using the...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Magnetochemistry |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2312-7481/11/2/12 |
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| Summary: | The organic–inorganic hybrid (BEDT-TTF)<sub>3</sub>[Cu<sub>2</sub>(μ-C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>·CH<sub>3</sub>CH<sub>2</sub>OH·1.2H<sub>2</sub>O] (<b>I</b>) was obtained using the electrocrystallization method. It comprises a θ<sup>21</sup>-phase organic donor layer and a two-dimensional inorganic antiferromagnetic honeycomb lattice. Cu(II) is octahedrally coordinated by three bisbidenetate oxalates, exhibiting Jahn–Teller distortion. CH<sub>3</sub>CH<sub>2</sub>OH and H<sub>2</sub>O molecules are located within the cavities of the honeycomb lattice. The total formal charge of the three donor molecules was assigned to be +2 based on the bond lengths in the TTF core, which corresponded to the Raman spectra. It is a semiconductor with <i>σ</i><sub>rt</sub> = 0.04 S/cm and <i>E</i><sub>α</sub> = 40 meV. No long-range ordering was observed above 2 K from zero-field cooling/field cooling magnetization, as confirmed by specific heat measurements. The spin frustration with f > 10 from the antiferromagnetic copper-oxalate-framework was observed. It is a candidate quantum spin liquid. |
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| ISSN: | 2312-7481 |