A sphere of a ferrogel is exposed to a homogeneous magnetic field. In accordance to theoretical predictions, it gets elongated along the field lines. The time dependence of the elastic shear modulus causes the elongation to increase with time, similar to mechanic creep experiments, and the rapid excitation causes the sphere to vibrate. Both phenomena can be well described by a damped harmonic oscillator model. By comparing the elongation along the field to the contraction perpendicular to it, we can calculate Poisson’s ratio of the gel. The magnitude of the elongation is compared to the theoretical predictions for elastic spheres in homogeneous fields.

The spin transition from a high-spin state to a low-spin state of Fe(III) ions in the compounds Fe(4-OCH₃-SalEen)₂ Y (Y = PF₆, NO₃) is investigated using the electron paramagnetic resonance (EPR) method. It is established that, unlike the compound with the PF₆ anion, the compound with the NO₃ anion is characterized by a temperature hysteresis of the properties of the spin transition. The thermodynamic characteristics of the spin transitions are determined from the EPR data. It is demonstrated that the specific features of the thermal evolution of the formation of the low-spin complexes are consistent with the domain model of the development of the spin transition.

Boron difluoride β-diketonate exhibiting liquid crystalline as well as photoluminescence properties was prepared for the first time. It is the promising material for creating supramolecular organized

Boron difluoride 2-alkyl-β-diketonates possessing liquid crystal polymorphism and luminescence properties were first obtained. Influence of the ligand structure on the liquid crystal properties of the boron difluoride complexes was demonstrated.