Metal-Organic Framework vs. Coordination Polymer—Influence of the Lanthanide on the Nature of the Heteroleptic Anilate/Terephtalate 3D Network

Metal-organic frameworks (MOFs), whose definition has been regularly debated, are a sub-class of coordination polymers (CPs) which may feature both an overall 3D architecture and some degree of porosity. In this context, MOFs based on lanthanides (Ln-MOFs) could find many applications due to the combination of sorption properties and magnetic/luminescent behaviors. Here we report rare examples of 3D Ln-CPs based on anilate linkers, obtained under solvothermal conditions using a heteroleptic strategy. The three compounds of formula [Yb2(μ-ClCNAn)2(μ-F4BDC)(H2O)4]·(H2O)3 (1), [Er2(μ-ClCNAn)2(μ-F4BDC)(H2O)4]·(H2O)4 (2) and [Eu2(μ-ClCNAn)2(μ-F4BDC)(H2O)6] (3) have been characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and optical measurements. Structural characterization revealed that compounds 1 and 2 present an interesting MOF architecture with extended rectangular cavities which are only filled with water molecules. On the other hand, compound 3 shows a much more complex topology with no apparent cavities. We discuss here the origins of such differences and highlight the crucial role of the Ln(III) ion nature for the topology of the CP. Compounds 1 and 2 now offer a playground to investigate the possible synergy between gas/solvent sorption and magnetic/luminescent properties of Ln-MOFs.

Unprecedented homochiral 3D lanthanide coordination polymers with triple-stranded helical architecture constructed from a rigid achiral aryldicarboxylate ligand

Luminescence and second harmonic generation activity of a series of homochiral 3D Ln-CPs were studied.

Two novel pillared-layer lanthanide borates built by Ln@B12O28/29 ring clusters and dicarboxylate linkers (Ln = Pr, Nd)

Two unusual organic–inorganic hybrid pillared-layer lanthanide borates with two types of Ln-centered ring clusters, Ln@B₁₂O₂₈ and Ln@B₁₂O₂₉, have been made.

The synergistic effect of cobalt on a Pd/Co catalyzed Suzuki–Miyaura cross-coupling in water

We report on the first Suzuki–Miyaura reaction promoted by a phosphine-free trimetallic Pd₂/Co catalyst proceeding in water, under aerobic conditions. Results reveal a synergistic Co–Pd cooperation.

Structural diversity of luminescent lanthanide metal–organic frameworks based on a V-shaped ligand

A systematic research of solvent and temperature induced structural diversity of lanthanide metal–organic frameworks based on a V-shaped ligand.

Highly thermostable lanthanide metal–organic frameworks exhibiting unique selectivity for nitro explosives

The solvent-free Eu-MOF with high red emission intensity and the microporous instinct exhibits high sensitivity for 2,4,6-trinitrophenol with K_sv constant 6.24 × 10⁴ M⁻¹.

Magnetic and luminescent properties of lanthanide coordination polymers with asymmetric biphenyl-3,2′,5′-tricarboxylate

An asymmetric ligand was employed to construct eight (3,6)-connected lanthanide complexes exhibiting slow magnetization relaxation behaviour and characteristic luminescent properties.

Synthesis, structure and properties of 2D lanthanide coordination polymers based on N-heterocyclic arylpolycarboxylate ligands

Eight 2D LCPs based on the N-heterocyclic arylpolycarboxylate ligands were prepared, and the luminescence and magnetic properties were studied.