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2021-11-29

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/185918

Unravelling of a [High Spin Low Spin] ↔ [Low Spin High Spin] Equilibrium in Spin-Crossover Iron(II) Dinuclear Helicates Using Paramagnetic NMR Spectroscopy

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https://doi.org/10.1002/anie.202110310

Abstract

Spin-crossover between high-spin (HS) and lowspin (LS) states of selected transition metal ions in polynuclear and polymeric compounds is behind their use as multistep switchable materials in breakthrough electronic and spintronic devices. We report the first successful attempt to observe the dynamics of a rarely found broken-symmetry spin state in binuclear complexes, which mixes the states [HS-LS] and [LSHS] on a millisecond timescale. The slow exchange between these two states, which was identified by paramagnetic NMR spectroscopy in solutions of two spin-crossover iron(II) binuclear helicates that are amenable to molecular design, opens a path to double quantum dot cellular automata for information storage and processing.

Subject

Simetria trencada (Física), Ressonància magnètica nuclear, Spin (Física nuclear)

Subject (English)

Broken symmetry (Physics), Nuclear magnetic resonance, Nuclear spin

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Articles publicats en revistes (Química Inorgànica i Orgànica)

Citation

ALESHIN, Dmitry, et al. Unravelling of a [High Spin Low Spin] ↔ [Low Spin High Spin] Equilibrium in Spin-Crossover Iron(II) Dinuclear Helicates Using Paramagnetic NMR Spectroscopy. Angewandte Chemie-International Edition. 2021. Vol. 61, num. e202110310. ISSN 1433-7851. [consulted: 12 of June of 2026]. Available at: https://hdl.handle.net/2445/185918

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