Year: 2025
Type: article
Abstract: Functional spin crossover (SCO) metal-organic frameworks (MOFs) hold promise for miniaturized spin-based devices due to their tuneable molecule-based properties near room temperature. SCO describes the phenomenon where transition metal ions switch between high spin (HS) and low spin (LS) states upon external stimuli. However, even simple guest molecules like water can significantly alter the properties of these materials. Understanding the interplay between SCO and these molecules is therefore crucial. This work investigates this interplay in a fascinating 3D Fe(II) SCO-MOF, recently reported to exhibit reversible conductivity even in bulk. A combined experimental and computational approach is employed to explore how guest molecule uptake/release influences SCO dynamics including a transition from partial HS/LS to a fully LS state at high temperatures, (named reverse SCO) and ligand disorder-order behavior. The findings reveal a solid-state mechanism that differs from those previously described.
Source: Small
Institutions: IMDEA Nanoscience, Universitat Autònoma de Barcelona, Institut Català de Nanociència i Nanotecnologia, Barcelona Institute of Science and Technology, Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona, Universitat de Barcelona, Centre National de la Recherche Scientifique, Science et Ingénierie des Matériaux et Procédés, Université Grenoble Alpes, Institut Laue-Langevin, Institució Catalana de Recerca i Estudis Avançats
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4407113354