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A. A. Durgaryan N. A. Durgaryan R. A. Arakelyan 《Russian Journal of General Chemistry》2010,80(5):976-981
Synthesic approach to polymers containing azo groups was developed on the basis of diazotization and azo-coupling reaction
of m-phenylenediamine (m-PDA) with various ratio m-phenylenediamine-sodium nitrite. Doping of poly(azoaminophenylenes) with iodine, perchloric and hydrochloric acids was examined.
Electroconductivity increases in the case of iodine to 0.2 S mol−1, of perchloric acid, to 7×10−3 S mol−1, and at the action of hydrogen chloride it is virtually unaffected. According to the ESR spectra, at the doping with iodine
and perchloric acid electroconductivity enhances generally due to the mobility increase of the charge carriers (polarons). 相似文献
4.
V. B. Arakelyan V. P. Danko R. P. Grigoryan 《Journal of Contemporary Physics (Armenian Academy of Sciences)》2017,52(1):70-75
The average, variance, correlation function and the spectral density of ligand–receptor complexes in the presence of the external Langevin noise are calculated and their characteristics are defined. The analysis of the experimental data using the formulas derived in this work enables one to obtain a new information on the process of forming of ligand–receptor complex, namely, the constants rates of formation and the decay of the ligand–receptor complex. 相似文献
5.
The forms of the surface of wave vectors for an extraordinary wave in the presence and absence of absorption are discussed. The normal transmission of light through a plane-parallel layer of a crystal with an open surface of wave vectors is considered. The diffraction reflection of light on natural periodic inhomogeneities of a crystal is studied. The frequency dependence of the reflection coefficient is calculated. 相似文献
6.
Yu. A. Troyan V. N. Pechenov E. B. Plekhanov A. Yu. Troyan S. G. Arakelyan V. I. Moroz A. P. Jerusalimov 《Physics of Atomic Nuclei》2000,63(9):1562-1573
The results are presented that are obtained from searches for and an investigation of isospin-two narrow resonances in the effective-mass spectrum of ppπ+ combinations originating from the reaction np → ppπ+π?π? induced by P n =5.20±0.13 GeV/c neutrons. Data subjected to our analysis come from the 1-m hydrogen bubble chamber installed at the Laboratory for High Energies, Joint Institute for Nuclear Research (Dubna), and exposed to a beam of quasimonochromatic neutrons. Narrow structures in the effective-mass spectrum of ppπ+ combinations are found at 2175, 2221, 2321, 2398, 2471, 2525, 2596, and 2709 MeV/c 2. The experimental widths of the resonances are determined primarily by the instrumental resolution. The branching fractions for various channels through which the 2596-MeV/c 2 resonance decays are determined to be (83±23)% for the Δ 33 ++ p channel, (10±3)% for the (BB) 2095 ++ π+ channel, and (7 ?7 +15 for the ppπ+ channel; here, (BB) 2095 ++ is a dibaryon in the two-proton system with a mass around 2095 MeV/c 2. A qualitative analysis of the spins of the 2596-and 2709-MeV/c 2 resonances is performed. 相似文献
7.
Yu. A. Troyan S. G. Arakelyan A. V. Belyaev A. P. Ierusalimov E. B. Plekhanov A. Yu. Troyan 《Physics of Particles and Nuclei Letters》2011,8(6):557-561
The results of a search for and study of the scalar 0+ [0++] σ0 mesons in a π+π− system produced in the reaction np → npπ+π− at the quasi-monochromatic neutron beam momentum P
n
= (3.83 ± 0.12) GeV/c are presented as derived from analyzing the data obtained during the exposure of a 1-meter hydrogen bubble chamber at the
Laboratory of High Energy, Joint Institute for Nuclear Research (LHE JINR). It is found that there is a significant bump in
the effective mass distribution at Mp+ p- = (404 ±5)MeV/c2M_{\pi ^ + \pi ^ - } = (404 \pm 5)MeV/c^2 and Γresexp = (14±5.4) MeV/c
2, which is observed with more than four standard deviations from the background. The spin of this resonance is estimated to
be most likely equal to zero. Its quantum numbers are found to be 0+ [0++]. 相似文献
8.
Grant J. Sherborne Avetik G. Gevondian Ignacio Funes-Ardoiz Amit Dahiya Christoph Fricke Prof. Dr. Franziska Schoenebeck 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(36):15673-15678
Selective C –C couplings are powerful strategies for the rapid and programmable construction of bi- or multiaryls. To this end, the next frontier of synthetic modularity will likely arise from harnessing the coupling space that is orthogonal to the powerful Pd-catalyzed coupling regime. This report details the realization of this concept and presents the fully selective arylation of aryl germanes (which are inert under Pd0/PdII catalysis) in the presence of the valuable functionalities C−BPin, C−SiMe3, C−I, C−Br, C−Cl, which in turn offer versatile opportunities for diversification. The protocol makes use of visible light activation combined with gold catalysis, which facilitates the selective coupling of C−Ge with aryl diazonium salts. Contrary to previous light-/gold-catalyzed couplings of Ar–N2+, which were specialized in Ar–N2+ scope, we present conditions to efficiently couple electron-rich, electron-poor, heterocyclic and sterically hindered aryl diazonium salts. Our computational data suggest that while electron-poor Ar–N2+ salts are readily activated by gold under blue-light irradiation, there is a competing dissociative deactivation pathway for excited electron-rich Ar–N2+, which requires an alternative photo-redox approach to enable productive couplings. 相似文献
9.
K. T. Avetyan M. M. Arakelyan S. A. Ancharakyan A. G. Patvakanyan 《Technical Physics》2000,45(4):509-511
The designed luminescent screen for an X-ray-to-optical image converter showed a high spatial resolution and a high efficiency in X-ray absorption and conversion. 相似文献
10.
The process of Λ-baryon production in πp collisions is considered. The contribution of the string-junction mechanism to the strange-baryon production in meson-baryon
scattering is analyzed. The results of numerical calculations in the framework of the quark-gluon string model are in reasonable
agreement with the data.
The text was submitted by the authors in English. 相似文献