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

Aleshin, Dmitry Yu ; Diego, Rosa ; Barrios, Leoní A. ; Nelyubina, Yulia V. ; Aromí, Guillem ; Novikov, Valentin V.

Angewandte Chemie (International ed.), 2022-01, Vol.61 (3), p.e202110310-n/a [Periódico revisado por pares]

Germany: Wiley Subscription Services, Inc

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Título:
Unravelling of a [High Spin—Low Spin] ↔ [Low Spin—High Spin] Equilibrium in Spin‐Crossover Iron(II) Dinuclear Helicates Using Paramagnetic NMR Spectroscopy
Autor: Aleshin, Dmitry Yu ; Diego, Rosa ; Barrios, Leoní A. ; Nelyubina, Yulia V. ; Aromí, Guillem ; Novikov, Valentin V.
Assuntos: broken symmetry ; Cellular automata ; Crossovers ; helicates ; Information processing ; Information storage ; Iron ; Magnetic resonance spectroscopy ; Metal ions ; NMR ; NMR spectroscopy ; Nuclear magnetic resonance ; paramagnetic NMR ; Quantum dots ; Spectroscopy ; Spectrum analysis ; spin crossover ; Transition metals
É parte de: Angewandte Chemie (International ed.), 2022-01, Vol.61 (3), p.e202110310-n/a
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Spin‐crossover between high‐spin (HS) and low‐spin (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 [LS‐HS] 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. For a binuclear complex with two spin crossover active ions, at least three different states are possible: fully high‐spin [HS‐HS] or low‐spin [LS‐LS] states that are commonly encountered and a relatively unusual intermediate [HS‐LS] state. The binuclear iron(II) helicates show the exchange dynamics [HS‐LS] ↔ [LS‐HS] on a millisecond timescale in such a broken‐symmetry state.
Editor: Germany: Wiley Subscription Services, Inc
Idioma: Inglês

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

Aleshin, Dmitry Yu ; Diego, Rosa ; Barrios, Leoní A. ; Nelyubina, Yulia V. ; Aromí, Guillem ; Novikov, Valentin V.

Germany: Wiley Subscription Services, Inc

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