SCIORTINO, Natasha F.; ZENERE, Katrina A.; CORRIGAN, Maggie E.; HALDER, Gregory J.; CHASTANET, Guillaume; LÉTARD, Jean François; KEPERT, Cameron J.; NEVILLE, Suzanne M.

doi:10.1039/C6SC03114E

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SCIORTINO, Natasha F.
School of Chemistry

ZENERE, Katrina A.
School of Chemistry

CORRIGAN, Maggie E.
School of Chemistry

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Chemical Science. 2017, vol. 8, n° 1, p. 701-707

The Royal Society of Chemistry

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A four-stepped cascade of Fe(II) high spin (HS) to low spin (LS) states is demonstrated in a family of 2-D Hofmann materials, [Fe3II(saltrz)6(MII(CN)4)3]·8(H2O) (MII = Pd (1Pd), Pt (1Pt); saltrz = (E)-2-(((4H-1,2,4-triazol-4-yl)imino)methyl)phenol). Alongside the fully HS and LS Fe(II) states, fractional spin state stabilization occurs at HS/LS values of 5/6, 2/3, and 1/6. This unconventional spin state periodicity is driven by the presence of multiple spin crossover (SCO) active Fe(II) sites which are in subtly distinct environments driven by a network of antagonistic host–host and host–guest interactions. Alternating long- and short-range magnetostructural ordering is achieved over the five distinct spin state ratios HS1.0LS0.0, HS0.833LS0.167, HS0.667LS0.333, HS0.167LS0.833, and HS0.0LS1.0 owing to the flexibility of this 2-D interdigitated lattice topology interconnected by intermolecular interactions. A distinct wave-like spin state patterning is structurally evidenced for each intermediate phase.< Leer menos

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Four-step iron(II) spin state cascade driven by antagonistic solid state interactions

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