Article Dans Une Revue Angewandte Chemie International Edition Année : 2024

Hofmann Clathrates: A "Blue Box" Approach to Modulate Spin-Crossover Properties

Résumé

Hofmann coordination polymers (CPs) with cationic ligands provide an innovative strategy for recognizing π-electron-rich aromatic molecules – similar to the “little blue box”. In this study, we demonstrate that hydroquinone molecules can be incorporated into these coordination polymers when redox-active bipyridinium derivatives are used as axial ligands. The insertion leads to a significant structural modification, resulting in a shift of the spin transition by 150 K and an approximate 23 % increase in volume, caused by the strong donor-acceptor π-π stacking interaction formed between the ligands and the guest molecule. These findings have been confirmed through temperature-dependent single crystal X-ray diffraction, magnetic measurements and optical reflectivity measurements.

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hal-04761740 , version 1 (31-10-2024)

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Livia Getzner, Laure Vendier, Gábor Molnár, Rotaru Aurelian, Saioa Cobo, et al.. Hofmann Clathrates: A "Blue Box" Approach to Modulate Spin-Crossover Properties. Angewandte Chemie International Edition, In press, 63 (46), pp.e202412525. ⟨10.1002/anie.202412525⟩. ⟨hal-04761740⟩
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