Slow magnetic relaxation in a heteroleptic anilate-based Dy metal-organic framework.

Novel heteroleptic anilate-based lanthanide MOFs (Ln = Tb, Dy, Ho) have been obtained under hydrothermal conditions by the ancillary ligand synthetic strategy. These structurally isomorphous species contain octacoordinated Ln ions with coordination polyhedra approaching an ideal symmetry, best described by a distorted biaugmented trigonal prismatic geometry. In the whole series, only the Dy-MOF exhibits SMM behaviour.

The Boundary Between Volume and Surface-Driven Magnetic Properties in Spinel Iron Oxide Nanoparticles.

Despite modern preparation techniques offer the opportunity to tailor the composition, size, and shape of magnetic nanoparticles, understanding and hence controlling the magnetic properties of such entities remains a challenging task, due to the complex interplay between the volume-related properties and the phenomena occurring at the particle's surface. The present work investigates spinel iron oxide nanoparticles as a model system to quantitatively analyze the crossover between the bulk and the surface-dominated magnetic regimes. The magnetic properties of ensembles of nanoparticles with an average size in the range of 5-13 nm are compared.

YO:Eu and the Mössbauer isomer shift coefficient of Eu compounds fromsimulations.

We report on a full potential density functional theory characterization of YOupon Eu doping on the two inequivalent crystallographic sites 24and 8. We analyze local structural relaxation, electronic properties and the relative stability of the two sites. The simulations are used to extract the contact charge density at the Eu nucleus.

Co-doped MnFeO nanoparticles: magnetic anisotropy and interparticle interactions.

The effect of cobalt doping on the magnetic properties of Mn Co FeO nanoparticles was investigated. All samples consist of ensembles of nanoparticles with a spherical shape and average diameter of about 10 nm, showing small structural changes due to the substitution. Besides having the same morpho-structural properties, the effect of the chemical composition, i.

A Platinum-Dithiolene Monoanionic Salt Exhibiting Multiproperties, Including Room-Temperature Proton-Dependent Solution Luminescence.

The platinum salt C[PtL2], where C = [(R)-Ph(Me)HC*-NMe3](+) and [PtL2](-) = radical monoanion based on [4', 5': 5, 6][1, 4]dithiino[2,3-b]quinoxaline-1',3'dithiolato, shows a variety of properties both in solution and in the solid state thanks to the electronic and/or structural features of the ligand. The complex crystallizes in the chiral space group P1 due to the presence of the enantiopure cation (R)-Ph(Me)HC*-NMe3(+), and it shows paramagnetic behavior relatable to the [PtL2](-) radical monoanion. This anionic complex is redox active and shows a strong near-infrared absorbance peak at 1085 nm tunable with the oxidation state of the complex.

Halogen-bonding in a new family of tris(haloanilato)metallate(III) magnetic molecular building blocks.

Here we report on new tris(haloanilato)metallate(III) complexes with general formula [A]3[M(X2An)3] (A = (n-Bu)4N(+), (Ph)4P(+); M = Cr(III), Fe(III); X2An = 3,6-dihalo derivatives of 2,5-dihydroxybenzoquinone (H4C6O4), chloranilate (Cl2An(2-)), bromanilate (Br2An(2-)) and iodanilate (I2An(2-))), obtained by a general synthetic strategy, and their full characterization. The crystal structures of these Fe(III) and Cr(III) haloanilate complexes consist of anions formed by homoleptic complexes formulated as [M(X2An)3](3-) and (Et)3NH(+), (n-Bu)4N(+), or (Ph4)P(+) cations. All complexes exhibit octahedral coordination geometry with metal ions surrounded by six oxygen atoms from three chelate ligands.

Self-assembly supramolecular architectures of chromium(III) complexes using croconate as building block.

The synthesis, X-ray structure and magnetic properties of polynuclear Cr(III) complexes with the croconate ligand (C5O5(2-)) are reported: [Cr(mu-C5O5)(micro-OH)(OH2)2]2 x 6H2O (, orthorombic, space group Cmca, a = 6.741(7) A, b = 18.841(9) A, c = 16.