Bidirectional photoswitchability in an iron(<scp>iii</scp>) spin crossover complex: symmetry-breaking and solvent effects
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en
Article de revue
Ce document a été publié dans
Chemical Science. 2023, vol. 14, n° 26, p. 7185-7191
The Royal Society of Chemistry
Résumé en anglais
The impact of solvent on spin crossover (SCO) behaviour is reported in two solvates [Fe(qsal-I) 2 ]NO 3 $2ROH (qsal-I = 4-iodo-2-[(8-quinolylimino)methyl]phenolate; R = Me 1 or Et 2) which undergo abrupt and gradual SCO, ...Lire la suite >
The impact of solvent on spin crossover (SCO) behaviour is reported in two solvates [Fe(qsal-I) 2 ]NO 3 $2ROH (qsal-I = 4-iodo-2-[(8-quinolylimino)methyl]phenolate; R = Me 1 or Et 2) which undergo abrupt and gradual SCO, respectively. A symmetry-breaking phase transition due to spin-state ordering from a [HS] to [HS-LS] state occurs at 210 K in 1, while T 1/2 = 250 K for the EtOH solvate, where complete SCO occurs. The MeOH solvate exhibits LIESST and reverse-LIESST from the [HS-LS] state, revealing a hidden [LS] state. Moreover, photocrystallographic studies on 1 at 10 K reveal re-entrant photoinduced phase transitions to a high symmetry [HS] phase when irradiated at 980 nm or a high symmetry [LS] phase after irradiation at 660 nm. This study represents the first example of bidirectional photoswitchability and subsequent symmetry-breaking from a [HS-LS] state in an iron(III) SCO material.< Réduire
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