Synthesis, crystal structures and magnetic properties of a series of pentanuclear heterometallic [CuII3LnIII2] (Ln = Ho, Dy, and Gd) complexes containing mixed organic ligands

Three novel heterometallic compounds [CuII3LnIII2] [Ln = Ho (1), Dy (2) and Gd (3)] containing mixed organic ligands were obtained. 1 and 2 show slow magnetic relaxation behaviour.

Tetranuclear Ni4 cubane complexes with high χT maxima: magneto-structural analysis

Seven tetranuclear Ni(ii) cubane complexes with unexpectedly high χT maxima coming from the ZFS contribution and with an interesting magneto-structural correlation.

Tetranuclear Ni(ii) and Co(ii) Schiff-base complexes with an M4O6 defective dicubane-like core: zero-field SMM behavior in the cobalt analogue

Two tetranuclear Ni₄ and Co₄ complexes were prepared and characterized. Their magnetic properties were thoroughly studied and it was revealed that the Co₄ compound behaves as a zero-field single-molecule magnet.

Facile access to efficiently luminescent Ln3+ phosphonic ester coordination polymers (Ln = Eu, Tb, Dy)

Efficiently luminescent coordination polymers containing lanthanide ions (Eu³⁺, Tb³⁺, Dy³⁺) can be easily obtained using a suitable bisphosphonic ester from which a heterometallic version can be elaborated showing white light emission.

A tetra-nuclear cubane-like nickel(II) complex with a tridentate salicyl-idene-imine Schiff base ligand: tetra-kis-[μ3-4-methyl-N-(2-oxidophen-yl)salicylideneiminato]tetra-kis-[methano-lnickel(II)] methanol 0.8-solvate

The tetra-nuclear title complex, [Ni4(C14H11NO2)4(CH3OH)4]·0.8CH3OH, has a distorted cubane topology shaped by four Schiff base ligands. The cubane [Ni4(μ3-O4)] core is formed via the O atoms from the Schiff base ligands. The octa-hedrally coordinated NiII ions occupy alternating vertices of the cube. Each NiII ion is coordinated by one O,N,O'-tridentate dianionic ligand, two O atoms of oxidophenyl groups from adjacent ligands and the O atom of a coordinating methanol mol-ecule. The cubane core is stabilized via an intra-molecular O-H⋯O hydrogen bond between the hy-droxy group of the coordinating methanol mol-ecules and the phenolate O atom of the aldehyde Schiff base fragment. Additional stabilization is obtained via intra-molecular C-H⋯O hydrogen bonds involving aromatic C-H groups and the oxygen atoms of adjacent methanol mol-ecules. In the crystal, complex mol-ecules are linked into chains parallel to the c axis via weak C-H⋯O hydrogen bonds. The partial-occupancy disordered methanol solvent mol-ecule has a site occupancy of 0.8 and is linked to the tetra-nuclear unit via an inter-molecular C-H⋯O hydrogen bond involving a phenolate O atom.