Reversible switching of slow magnetic relaxation in a classic lanthanide metal–organic framework system

Abstract

The reversible sorption-desorption of terminal coordinated water molecules and the guest molecules can switch slow magnetic relaxation in a classic lanthanide metal-organic framework system, Dy(BTC)(H2O)·DMF and Dy(BTC).

Metal-Organic Framework of Lanthanoid Dinuclear Clusters Undergoes Slow Magnetic Relaxation

“…From Equation (1), τ 0 for 1 was determined to be 2.1 × 10 –6 s, and Δ E was determined to be 22.5 cm –1 . These values are similar to those reported for some Dy(III)-based SMMs [15,18,22], although they are slightly lower due to the distorted coordination environment.…”

“…In particular, since Ln ions can have large coordination numbers, MOFs can be designed to be flexible and to have sophisticated structures. For example, Dy(III) ions and 1,3,5-benzenetricarboxylate (BTC) have been reported to assemble into a MOF with a highly symmetrical structure, which undergoes reversible slow magnetic relaxation driven by sorption or desorption of terminal coordinated water and guest molecules [15]. The magnetic properties of Ln-MOFs can be enhanced by changing their structures.…”

Photo-activation of Single Molecule Magnet Behavior in a Manganese-based Complex

“…In order to use SMMs in information storage devices, the magnetic properties of the SMMs must show hysteresis, and it must be possible to control them by applying external stimuli, such as light, electric, pressure, etc. , which can be accomplished by including multifunctional ligands 2 3 4 5 . Photo-switchable magnetic materials have become quite important in the field of high-density information storage media 6 7 8 .…”

Electro-activity and magnetic switching in lanthanide-based single-molecule magnets

“…25 can be reversibly recovered by single-crystal-to-single-crystal transformation by immersion of 26 in a H 2 O/DMF mixture. 79 25 did not show any SMM behaviour in zero and non-zero applied magnetic fields while after removing the guest solvent molecules, 26 behaved as an SMM in both zero and 1000 Oe applied magnetic fields. Both thermally dependent and independent magnetic relaxation processes were present.…”