Electrochemical polymerization of <Emphasis Type=Italic>N</Emphasis>,<Emphasis Type=Italic>N</Emphasis>′-bis(3-methoxysalicylidene)-1,3-propylenediamine

The electrochemical oxidation of N,N′-bis(3-methoxysalicylidene)-1,3-propylenediamine leads to the formation of conducting polymer on the electrode surface. The decisive role of phenol oxygen in the formation of the polymeric forms of azomethine bases was elucidated. Optimal conditions for the synthesis of the polymer in the potentiostatic conditions were revealed. The coefficient of the charge diffusion and the activation barrier for the charge transfer in the polymer bulk in the electrolyte medium were determined.     

Physicochemical and adsorption properties of hypercross‐linked polystyrene with ultimate cross‐linking density

The paper describes unexpected properties of hypercross‐linked polystyrenes with ultimate cross‐linking degrees of 300, 400, and 500%, where three, four, or five methylene links, respectively, could bind each polystyrene phenyl ring to its spacious neighbors. The polymers exhibit a strong electron spin resonance signal, unusual spectra in IR, UV, and visible ranges, and they are not typical dielectrics. The nonfunctionalized hypercross‐linked polymers absorb significant amounts of inorganic acids, salts, and bases due to interactions of protons or other cations with electron‐donating fragments of the aromatic network with the high extent of mutual connectivity and also due to dispersion interactions of anions with the polymer matrix.     

Crystal-chemical analysis of the structures of minerals with [Hg<Subscript>2</Subscript>]<Superscript>2+</Superscript> dumbbells

An analysis of the structures of minerals with [Hg₂]²⁺ dumbbells including poyarkovite [Hg₂]₃Cl₂O₂, shakhovite [Hg₂]₂Sb(OH)₃O₃, vasilyevite Hg₂₀O₆I₃Br₂Cl(CO₃), and kelyanite [Hg₂]₆[SbO₆]BrCl₂ was carried out. The determining factor in structure formation is the ordering of the centers of the cluster groups of mercury and large anions by systems of equidistant parallel planes with d _hkl ～ 2.5–4.5 Å. The different combinations of atoms and fragments in the structure are ordered by their own pseudotranslation lattices; this probably reflects the stages of crystallization. The crystal structures under study are examples of balance between the local interatomic interactions and the forces that create long-range order for different stoichiometries, masses, and sizes of components.     

Substantiation of the mechanism of biphoton nonresonance excitation of molecules of bacteriochlorophyll of purple bacteria by femtosecond pulses

In a series of published experimental works, there has been observed nonresonance biphoton excitation, by femtosecond IR pulses (1250–1500 nm) of molecules of bacteriochlorophyll-a and the pigment in the composition of light-absorbing natural “antenna” complexes of photosynthesizing purple bacteria. The authors of these works believe that IR quanta excite hypothetical forbidden levels of pigments of these bacteria in the dual frequency range of 625–750 nm. In this study, an alternative mechanism of intramolecular electron transport apparently responsible for this phenomenon is suggested and substantiated. The mechanism should manifest itself in powerful electric fields, which are achieved in the pulses of picofemtosecond lasers.     

A theoretical study of the structure of pentadienyllithium

Conclusions MNDO quantum-chemical calculations indicated a mechanism for the rapid rearrangement of PDL with migration of lithium along the hydrocarbon skeleton of the ligand.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2132–2134, September, 1986.     

Factors Determining the Charge Transfer Rate in Polymers Based on Fe(II), Ru(II), and Os(II) Complexes with 5-Chloro-1,10-Phenanthroline

The effect of ionic diffusion on parameters of redox electrical conductivity in poly-[M(5-Cl-phen)₃]^{2 +} (M = Fe, Ru, Os) was studied.     

Spiral vortices in ferromagnets

New types of magnetic defects in two-dimensional ferromagnets are found in the exchange approximation, and the influence of magnetic anisotropy on their structure is analyzed.