A Molecule-Based Nanoporous Material Showing Tuneable Spin-Crossover Behavior near Room Temperature


  • This work was supported by the Dutch WFMO (Werkgroep Fundamenteel Materialen Onderzoek), CW (Foundation for the Chemical Sciences), NWO (Organization for the Scientific Research), and the Spanish Ministerio de Ciencia y Tecnología through a “Ramón y Cajal” and a “Juan de la Cierva” contract. Coordination by the FP6 Network of Excellence “Magmanet” (contract number 515767) is also gratefully acknowledged. Xavier Alcobé and Josep Bassas (SCT-UB) are gratefully acknowledged for their assistance with XRPD measurements. CCDC 633362 contains the supplementary crystallographic data for this Communication. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre. Supporting Information is available online from Wiley InterScience or from the authors.


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A FeII-based 1D open framework that exhibits room-temperature spin- crossover (SCO) is reported. This material shows a reversible structural, magnetic, and chromatic response to a sorption/desorption process, allowing the tuning of the spin-transition properties by choosing the appropriate solvent (see figure). This feature represents the first example of a bifunctional material in which host–guest properties directly influence the SCO properties.