The reaction between two equivalents of the Schiff base ligands N,N′-bis(3-methoxysalicylidene)ethylenediamine (H2L1) or enantiopure N,N′-bis(3-methoxysalicylidene)cyclohexane-1,2-diamine (H2L2) with one equivalent of Ce(NO3)3·6H2O in the presence of a bulky counteranion leads to the formation of chiral metal–organic frameworks (MOFs) whose channels encapsulate the counteranion, leading to the formation of compounds with the structural formulas {[Ce(NO3)2(L1)2]X·H2O}n, where X = ClO4– (1), PF6– (2), or BF4– (3), and {[Ce(NO3)2(L2)2]X·CH3CN}n, where X = ClO4– (4), PF6– (5), or BF4– (6), as well as the isostructural reference compound {Nd(NO3)2(L1)2]BF4·CH3CN}n (3Nd). A combination of static and dynamic magnetic measurements demonstrates the good isolation of the CeIII centers and a field-induced slow relaxation of the magnetization. Correlations between the temperature and field-dependent magnetic relaxation data and ultralow-frequency Raman spectroscopy reveal the presence of a vibronic barrier driving magnetic relaxation. Theoretical calculations have been performed to elucidate the nonparticipation of the electronic excited states in the main relaxation processes.

This study reveals a novel mechanism for the reversible spin crossover (SCO) behavior of the 3D Fe(II) SCO-MOF, highlighting the intricate interplay between the SCO phenomenon, water uptake/release, ....

A purely synthetic supramolecular chemistry approach enables the protection of the spin-based qubit [Cr(ox)3]3− from external sources of decoherence in the solid state, leading to the enhancement of ...

The controlled deposition of organized molecular materials on technologically relevant substrates is crucial for the development of innovative magneto-optical devices. In this work, we report the grow...

The controlled deposition of organized molecular materials on technologically relevant substrates is crucial for the development of innovative magneto-optical devices. In this work, we report the grow...

Mechanochemical synthesis provides access to clean, effective, and rapid synthesis of 2D van der Waals MOFs [Ln(MeCOO)(PhCOO)2] (1Eu, 2Eu, 2Tb). The method also allows easy access to heterometallic analogue 2LaTb. All samples are obtained as nanosized crystals, and 1Eu has been characterized by electron crystallography (3D-ED). Thus, mechanochemistry and 3D-ED is a winning combination for the clean synthesis of 2D MOFs that can be upscaled to multigram synthesis.

This artwork represents the energy barrier an SMM must overcome to reverse its magnetization as a large snowy mountain. Under-barrier processes involving specific phonons can mediate magnetic relaxati...