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61.
V. Ksenofontov K. Kroth S. Reiman F. Casper V. Jung M. Takahashi M. Takeda C. Felser 《Hyperfine Interactions》2006,168(1-3):1201-1206
The family of half-Heusler compounds offers a variety of half-metallic ferromagnetic materials. We have applied the Mössbauer spectroscopy to study the atomic order, local surroundings and hyperfine fields to several half-Heusler compounds. 121Sb Mössbauer study of the compound CoMnSb revealed the presence of two nonequivalent antimony positions in the elementary cell and enabled to identify the structure. 119mSn, 155Gd and 197Au Mössbauer spectroscopic studies were used to characterize the properties of ferromagnetic granular material based on the half-Heusler ferromagnet MnAuSn in the antiferromagnetic GdAuSn matrix. 相似文献
62.
This short review article concerns a new family of iron(II) spin transition chain compounds containing 4-R-1,2,4-triazole derivatives whose properties have been followed by several physical techniques. A clear evidence of the LIESST effect at 20 K has been found for one of these materials by 57Fe Mössbauer spectroscopy. Potential applications in terms of pressure and thermal sensors are discussed. 相似文献
63.
Natalia A. Bumagina Elena V. Antina Anna Yu. Nikonova Mikhail B. Berezin Alexander A. Ksenofontov Anatoly I. Vyugin 《Journal of fluorescence》2016,26(6):1967-1974
3,3′,5,5′-Tetraphenyl-2,2′-dipyrromethene was described as a highly sensitive and selective Off-on fluorescent colorimetric chemosensor for Zn2+ based on the chelation-enhanced fluorescence (CHEF) effect. The reaction of dipyrromethene ligand with Zn2+ induces the formation of the [ZnL2] complex, which exhibits the increasing fluorescence in 120 fold compared with ligand in the propanol-1/cyclohexane (1:30) binary mixture. The Zn2+ detection limit was 1.4 × 10?7 М. The UV-Vis and fluorescence spectroscopic studies demonstrated that the dipyrromethene sensor was highly selective toward Zn2+ cations over other metal ions (Na+, Mg2+, Co2+, Ni2+, Fe3+, Cu2+, Mn2+, Cd2+ and Pb2+), excluding Hg2+. 相似文献
64.
Alekseev A. K. Atlasov E. A. Bolotnikov N. G. Bosikov A. V. Dyachkovskiy N. A. Gerasimova N. S. Glushkov A. V. Ivanov A. A. Ivanov O. N. Kardashevsky D. N. Kellarev I. A. Knurenko S. P. Krasilnikov A. D. Krivenkov A. N. Ksenofontov I. V. Ksenofontov L. T. Lebedev K. G. Matarkin S. V. Mokhnachevskaya V. P. Nikolaeva E. V. Neustroev N. I. Petrov I. S. Platonov N. D. Proshutinsky A. S. Saburov A. V. Sleptsov I. Ye. Struchkov G. G. Timofeev L. V. Yakovlev B. B. 《Physics of Atomic Nuclei》2021,84(6):893-906
Physics of Atomic Nuclei - The Yakutsk Extensive Air Shower Array has been continuously operating for more than 50 years (since 1970) and up until recently it has been one of world’s largest... 相似文献
65.
Dr. Il'ya A. Gural'skiy Olesia I. Kucheriv Sergii I. Shylin Dr. Vadim Ksenofontov Dr. Ruslan A. Polunin Prof. Igor O. Fritsky 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(50):18076-18079
The diversity of spin crossover (SCO) complexes that, on the one hand, display variable temperature, abruptness and hysteresis of the spin transition, and on the other hand, are spin‐sensitive to the various guest molecules, makes these materials unique for the detection of different organic and inorganic compounds. We have developed a homochiral SCO coordination polymer with a spin transition sensitive to the inclusion of the guest 2‐butanol, and these solvates with (R)‐ and (S)‐alcohols demonstrate different SCO behaviours depending on the chirality of the organic analyte. A stereoselective response to the guest inclusion is detected as a shift in the temperature of the transition both from dia‐ to para‐ and from para‐ to diamagnetic states in heating and cooling modes respectively. Furthermore, the Mössbauer spectroscopy directly visualizes how the metallic centres in a chiral coordination framework differently sense the interaction with guests of different chiralities. 相似文献
66.
Kazakov V. A. Kokshina A. V. Razina A. G. Vasilev A. I. Vasilyeva O. V. Ksenofontov S. I. 《Journal of Applied Spectroscopy》2022,89(3):517-521
Journal of Applied Spectroscopy - The influence of the heating procedure and annealing temperature in air on the transmission spectra and morphology of linear-chain carbon films synthesized by the... 相似文献
67.
A. A. Karabutov A. G. Kaptilniy A. Yu. Ivochkin D. M. Ksenofontov A. D. Trofimov 《Moscow University Physics Bulletin》2013,68(5):383-386
The results of the optoacoustic study of aluminum states within a temperature range of 3–14 kK and a pressure range of 0.1–4 kbar were considered. These high-energy states were achieved by heating a submicron metal film confined by a transparent dielectric via nanosecond laser pulses with a fluence of up to 11 J/cm2. The dynamics of the temperature, pressure, and reflectivity of aluminum was studied at a nanosecond time resolution. 相似文献
68.
A. Yu. Ivochkin A. G. Kaptilniy A. A. Karabutov D. M. Ksenofontov 《Laser Physics》2012,22(7):1220-1228
First-order phase transitions in metal induced by nanosecond laser pulse are studied here. The metal surface is irradiated through a layer of transparent dielectric??an optical glass. Such confinement considerably increases the efficiency of pressure generation at the metal surface. This technique allows to obtain near-critical states of metals??with temperatures ??104 K and pressures ??104 atm with table-top equipment. At the same time the glass prevents the ablation plume formation??so the surface temperature can be measured using thermal radiation data. An experimental setup for simultaneous measurements of pressure, temperature and reflectivity was assembled based on the elaborated method of experimental research. The processes of melting of lead and boiling of mercury were studied. The onset of the phase transition process led to a considerable tightening of the pressure pulse. A substantial drop of surface reflectivity due to increase of temperature and decrease of density was observed. 相似文献
69.
M.I. Shukoor F. Natalio M.N. Tahir M. Divekar N. Metz H.A. Therese P. Theato V. Ksenofontov H.C. Schröder W.E.G. Müller W. Tremel 《Journal of magnetism and magnetic materials》2008
Multifunctional polymer-derivatized superparamagnetic iron oxide (γ-Fe2O3) nanoparticles were prepared for biomagnetic separation of histidine-tagged recombinant proteins building up a faster and efficient method for protein separation by making use of their intrinsic magnetic properties. Using polymer bound γ-Fe2O3 nanocrystals, a 6× histidine-tagged recombinant protein (silicatein) with a molecular weight of 24 kDa has been isolated and purified. The supermagnetic iron oxide nanocrystals were characterized by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), SQUID and Mössbauer and the polymer functionalization of the γ-Fe2O3 nanocrystals was monitored by UV–vis spectroscopy and light microscopy. Protein immobilization and separation was monitored using immunostaining techniques and gel electrophoresis, respectively. 相似文献
70.
Anastasia V. Shishkina Alexander A. Ksenofontov Nikita V. Penkov Mikhail V. Vener 《Molecules (Basel, Switzerland)》2022,27(10)
Self-assembly of organic ions in aqueous solutions is a hot topic at the present time, and substances that are well-soluble in water are usually studied. In this work, aqueous solutions of sodium diclofenac are investigated, which, like most medicinal compounds, is poorly soluble in water. Classical MD modeling of an aqueous solution of diclofenac sodium showed equilibrium between the hydrated anion and the hydrated dimer of the diclofenac anion. The assignment and interpretation of the bands in the UV, NIR, and IR spectra are based on DFT calculations in the discrete-continuum approximation. It has been shown that the combined use of spectroscopic methods in various frequency ranges with classical MD simulations and DFT calculations provides valuable information on the association processes of medical compounds in aqueous solutions. Additionally, such a combined application of experimental and calculation methods allowed us to put forward a hypothesis about the mechanism of the effect of diclofenac sodium in high dilutions on a solution of diclofenac sodium. 相似文献