Cerium(IV)−Lanthanide(III)−Pyridine-2,6-dicarboxylic Acid System: Coordination Salts, Chains, and Rings

Mg1−xCoxLi2(3,5-pdcH)2(DMF)2 (x = 0, 0.285, 0.575, 1): a series of heterometallic coordination polymers doped with magnetic Co2+ ions

Presented is a series of Mg_1−xCo_xLi-HCPs with the turn-on effect of anti-ferromagnetic properties upon the doping of high-spin Co²⁺ ions at Mg²⁺ sites.

Structural Systematics for Lanthanide(III) Systems: Interactions of the Achiral Hexamminecobalt(III) Cation with Tris(dipicolinato)lanthanate(III) Anions

Extended structural studies, largely determinations at ~150 K, of the family of hydrates of [Co(NH3)6][Ln(dipic)3] (Ln = La–Lu, and Y; dipic = dipicolinate = pyridine-2,6-dicarboxylate) have provided detailed evidence of the nature of the interactions between the formally achiral cation and the chiral anions. They also provide a reference point for consideration of related systems incorporating chiral cations with and without the capacity to act as H-bond donors.

Phenalenyl-based mononuclear dysprosium complexes

The phenalenyl-based dysprosium complexes [Dy(PLN)2(HPLN)Cl(EtOH)] (1), [Dy(PLN)3(HPLN)]·[Dy(PLN)3(EtOH)]·2EtOH (2) and [Dy(PLN)3(H2O)2]·H2O (3), HPLN being 9-hydroxy-1H-phenalen-1-one, have been synthesized. All compounds were fully characterized by means of single crystal X-ray analysis, paramagnetic (1)H NMR, MALDI-TOF mass spectrometry, UV-vis spectrophotometry and magnetic measurements. Both static (dc) and dynamic (ac) magnetic properties of these complexes have been investigated, showing slow relaxation of magnetization, indicative of single molecule magnet (SMM) behavior. Attempts to synthesize sublimable phenalenyl-based dysprosium complexes have been made by implementing a synthetic strategy under anhydrous conditions. The sublimed species were characterized and their thermal stability was confirmed. This opens up the possibility to deposit phenalenyl-based lanthanides complexes by sublimation onto surfaces, an important prerequisite for ongoing studies in molecular spintronics.

Tuning the properties of the UiO-66 metal organic framework by Ce substitution

Replacement of Zr by Ce in a metal organic framework gives defects and redox activity for use in heterogeneous catalysis.

Tetra-μ-acetato-κ4O:O′;κ3O,O′:O;κ3O:O,O′-bis[(acetato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)europium(III)]

In the title centrosymmetric dinuclear complex, [Eu₂(CH₃CO₂)₆(C₁₂H₈N₂)₂], the Eu^III atom is nine-coordinated by two N atoms from a 1,10-phenanthroline ligand and seven O atoms from five acetate ligands (two bidentate, three monodentate). The crystal structure is stabilized by π–π stacking inter­actions between the pyridine and benzene rings of adjacent mol­ecules, with a centroid–centroid distance of 3.829 (2) Å.