Luminescent and magnetic [TbEu] 2D metal–organic frameworks

Abstract

We present the synthesis, through a simple, microwave-assisted method, of lanthanoid-based 2D metal-organic frameworks (MOFs) of general formula [LnxLn’1-x(MeCOO)(PhCOO)2], including homonuclear compounds (x=1), Ln=Eu, Tb, and heterometallic compounds, [TbEu]. The...

A Family of Lanthanoid‐Sodium Multifunctional Coordination Polymers: Single‐Molecule Magnet, Luminescent and Magnetocaloric Properties

“…Lanthanoid luminescence often relies on the antenna effect. The SALOH ligand contains a phenyl ring that could effectively act as an antenna to Tb 3+ and Eu 3+ , as we have shown with 2D Tb and Eu 2D MOFs [47,48] . In solution, SALOH 2 shows its maximum absorbance between 300 and 350 nm, depending on the solvent [49] .…”

“…The SALOH ligand contains a phenyl ring that could effectively act as an antenna to Tb 3 + and Eu 3 + , as we have shown with 2D Tb and Eu 2D MOFs. [47,48] In solution, SALOH 2 shows its maximum absorbance between 300 and 350 nm, depending on the solvent. [49] In order to study the luminescence of 1Tb and 1Eu, crushed crystals were placed in a quartz holder.…”

On-surface magnetocaloric effect for a van der Waals Gd(iii) 2D MOF grown on Si

“…It is analogous to that of the other reported compounds of the series. 19,20 Compound 1 crystallizes in the monoclinic space group P 2 1 / c . van der Waals stacks of 2D layers of formula [Gd(MeCOO)(PhCOO) 2 ] form along the a axis of the unit cell.…”

“…18 The Tb and TbEu analogues display both SMM and luminescent properties. 19,20 The fact that the interactions between 2D layers are purely van der Waals forces of the order of those found in graphene allows an easy delamination of the material in flakes and monolayers.…”

Magnetic properties and magnetocaloric effect of Ln = Dy, Tb carborane-based metal–organic frameworks

“…Indeed, trivalent Ln( iii ) ions favor outstanding luminescence features like a large Stokes shift, high purity of colours and considerable quantum yields, especially in Tb( iii ) and Eu( iii ) ions. 12,26–28 In addition, the 4f orbitals of Ln( iii ) ions provide a significant magnetic moment and intrinsic anisotropy. Thus, they are good candidates for the construction of single-molecule magnets (SMMs), showcasing magnetic stability and quantum-tunneling effects.…”