Temperature Dependences of the Saturated Vapor Pressure of Lantanum Complexes Based on 2-(2-Benzoxazol-2-yl)phenolate Ligand

Russian Journal of General Chemistry - Temperature dependences of the saturated vapor pressure of lanthanum complexes based on 2-(2-benzoxazol-2-yl)phenolate ligand have been obtained using the...     

Utilizing o-quinone methide chemistry: synthesis of sterically hindered acridin-4-ols

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Dielectric properties of betaine phosphite and deuterated betaine phosphite films

Polycrystalline films of betaine phosphite (BPI) and deuterated BPI have been grown by evaporation on LiNbO₃, α-SiO₂, α-Al₂O₃, and NdGaO₃ substrates. These films consist of large single-crystal blocks in which the polar axis (b) lies in the substrate plane. The results of studying the dielectric properties of the films using interdigital electrodes, X-ray diffraction, and block images in a polarized-light microscope in reflection are reported. The film transition into the ferroelectric state at T = T _c is accompanied by strong anomalies of the capacitance of the film/interdigital structure/substrate structure. The deuteration of BPI films leads to an increase in their temperature T _c: from T _c = 200 K for BPI-based structures to T _c = 280 K for structures with a high degree of deuteration (d ∼ 90%).     

Acoustic properties of betaine phosphite in the vicinity of phase transitions

A study is reported of acoustic anomalies in the vicinity of the antiferrodistortive and ferroelectric phase transitions in nominally pure betaine phosphite crystals and a crystal with 3% betaine phosphate impurity. The observed anomalies in the velocity and damping rate of longitudinal acoustic waves propagating along different crystallographic axes are interpreted within Landau theory. It is shown that the phase transitions in these crystals are characterized by a relatively weak correlation of the order parameter to strain and by a considerable contribution to the acoustic anomalies of an interaction higher in order than striction. Fiz. Tverd. Tela (St. Petersburg) 40, 1090–1096 (June 1998)     

On the double-scattering effect from polycrystals

It has been found that the high-energy side of the polycrystal-scattered ion energy distribution may exhibit a distinct and intense peak similar to the double-scattering peak observable for single-crystalline targets.     

Argon ion double scattering from polycrystalline copper

It has been found that under certain conditions the high-energy side of the polycrystal-scattered ion energy distribution may exhibit a distinct and intense peak similar to the double-scattering peak observable for single-crystalline targets.     

A two-dimensional displacement problem in nonhomogeneous layered strata in the presence of an unknown moving boundary

We examine the problem of water injection into a limited reservoir, initially completely filled with oil, consisting of two permeable strata separated by an impermeable layer.     

Dissociation of fast molecular ions under interaction with a material: Separation of atomic fragments

Computer simulation of the dissociation (Coulomb explosion) of fast molecular ions penetrating through thin films is performed on the basis of coupled differential equations. The charge-state distributions and angular deflections of the atomic fragments of a molecular nitrogen (N₂⁺) ion have been computed in the case of penetration through an amorphous carbon film. The computational results are compared with the experimental data.