Modulation of Spin-Crossover in Metal¿Organic Frameworks by Ionic-Liq id Guests
The control over the spin crossover (SCO) transition in microporous metal-organic frameworks (MOFs) is of current interest due to their potential application. Although tuning the SCO transition by including volatile guests into [Fe(pz)Ni(CN)4] has interesting potential implications for gas-adsorption, the thermal stability of the guest loaded materials is limited. Here is where the incorporation of ionic liquids (ILs) as guest of SCO MOFs (SCO-MOF@IL) makes the difference. Their chemical versatility enables the combination of myriad of organic/inorganic components. Despite previous studies focusing on the structure of SCO-MOF@IL, the aspect of IL dynamics within [Fe(pz)Ni(CN)4] remains unexplored. Studying the dynamics of [Fe(pz)Ni(CN)4]@IL is crucial as it can unveil the interactive behaviours between IL-MOF, potentially leading to enhanced material properties, and SCO transition control. The mobility of the IL when confined in MOF is related with the internal pressure that it applies to the framework, that in turn is linked to the complete/partial locking of the SCO transition. These findings will contribute to the development of new materials with tunable properties.
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Bruna F. Gonçalves; Roberto Fernández de Luis; GOLUB Maksym; OLLIVIER Jacques; PETRENKO Viktor; PIEPER Joerg; PORRO AZPIAZU Jose Maria; SALAZAR Hugo; SEYDEL Tilo and VIDAL MARTIN Elvira. (2025). Modulation of Spin-Crossover in Metal¿Organic Frameworks by Ionic-Liq id Guests. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-07-146
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