A5028534508- Inorganic Fluorides and Related Compounds
- Advanced Chemical Physics Studies
- Magnetism in coordination complexes
- Electron Spin Resonance Studies
- Pulsed Power Technology Applications
- Lanthanide and Transition Metal Complexes
- Gyrotron and Vacuum Electronics Research
- Chemical Reactions and Mechanisms
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Particle accelerators and beam dynamics
- Molecular Spectroscopy and Structure
- Electric Power Systems and Control
- Atmospheric Ozone and Climate
- Industrial Engineering and Technologies
- Engineering Diagnostics and Reliability
- Perovskite Materials and Applications
- Radiation Effects and Dosimetry
- Quantum, superfluid, helium dynamics
- Fullerene Chemistry and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Fluorine in Organic Chemistry
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Synthesis and characterization of novel inorganic/organometallic compounds
Institute of Problems of Chemical Physics
2015-2024
Moscow State Technological University
2024
Lomonosov Moscow State University
2024
University of Technology
2024
Budker Institute of Nuclear Physics
2007-2021
Scientific Center of RAS in Chernogolovka
1999-2020
Novosibirsk State University
2017
Russian Academy of Sciences
1997-2014
Research Institute of Semiconductor Devices
2010-2011
Siberian Branch of the Russian Academy of Sciences
2010
In this article we report the synthesis and structure of new Co(II) complex Et4N[CoII(hfac)3] (I) (hfac = hexafluoroacetylacetonate) exhibiting single-ion magnet (SIM) behavior. The performed analysis magnetic characteristics based on complementary experimental techniques such as static dynamic measurements, electron paramagnetic resonance spectroscopy in conjunction with theoretical modeling (parametric Hamiltonian ab initio calculations) demonstrates that SIM properties I arise from...
We report three new noble-gas molecules prepared in low-temperature Kr and Xe matrices from the HCCF precursor by UV photolysis thermal annealing. The identified are two hydrides HNgCCF (Ng = Xe) a molecule of another type, HCCKrF. These assigned with help ab initio calculations. All strong absorptions predicted theory found experiments proper deuteration shifts. suggest higher stability against dissociation compared to HNgCCH reported previously. Surprisingly, only very tentative traces...
We report a combined experimental characterization and theoretical modeling of the hexa-coordinated high-spin Co(ii) complex cis-[Co(hfac)2(H2O)2] (I). The magnetic static field (DC) data EPR spectra (measurements were carried out on powder samples diluted cis-[Co0.02Zn0.98 (hfac)2(H2O)2]) analyzed with aid parametric Griffith Hamiltonian for supported by ab initio calculations crystal (CF) parameters, g-factors superexchange parameters between H-bonded ions in neighboring molecules 1D...
Free radicals C(60)F and C(70)F were generated in solid argon by means of chemical reaction photogenerated fluorine atoms with isolated fullerene molecules (C(60) or C(70)). High resolution anisotropic electron paramagnetic resonance (EPR) spectra at low temperature have been obtained for the first time. The spectrum is characterized an axially symmetric hyperfine interaction on (19)F nucleus. coupling constants A(iso)=202.8 MHz (Fermi contact interaction) A(dip)=51.8 (electron-nuclear...
Accurate determination of the spin Hamiltonian parameters in transition-metal complexes with large zero-field splitting (ZFS) is an actual challenge studying magnetic and spectroscopic properties high-spin transition metal complexes. Recent critical papers have convincingly shown that previous determinations these parameters, based only on data, low accuracy reliability. A combination X-band electron paramagnetic resonance (EPR) spectroscopy SQUID magnetometry seems to be a more convincing...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of the CH3-HF Complex in Reaction Thermal F Atoms with CH4 Solid ArEugenii Ya. Misochko, Victor A. Benderskii, Albert U. Goldschleger, Alexander V. Akimov, and F. ShestakovCite this: J. Am. Chem. Soc. 1995, 117, 48, 11997–11998Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https://doi.org/10.1021/ja00153a023RIGHTS & PERMISSIONSArticle...
Septet 2,4,6-trinitrenotoluene is the major paramagnetic product formed during photolysis of 2,4,6-triazidotoluene in cryogenic matrices. This trinitrene displays different electron resonance (EPR) spectra solid argon and 2-methyltetrahydrofuran (2MTHF) glass, corresponding to septet spin states with zero-field splitting (ZFS) parameters D(S) = -0.0938 cm(-1), E(S) -0.0040 cm(-1) -0.0934 -0.0015 respectively. Analysis these shows that molecular electronic structure derived from EPR spectrum...
High-spin organic molecules with dominant spin-orbit contribution to magnetic anisotropy are reported. Quintet 4-azido-3,5-dibromopyridyl-2,6-dinitrene (Q-1), quintet 2-azido-3,5-dibromopyridyl-4,6-dinitrene (Q-2), and septet 3,5-dibromopyridyl-2,4,6-trinitrene (S-1) were generated in solid argon matrices by ultraviolet irradiation of 2,4,6-triazido-3,5-dibromopyridine. The zero-field splitting (ZFS) parameters, derived from electron spin resonance spectra, show unprecedentedly large...
Abstract Low‐temperature UV‐photolysis of mesitylphosphiranes under highly anaerobic conditions leads to the formation triplet mesitylphosphinidene (MesP). The recorded X‐band EPR spectrum MesP and derived zero‐field splitting parameter D =4.116 cm −1 differ significantly from those reported previously for this intermediate. New magnetic parameters are discussed along with results DFT calculations.
The high resolution 9 GHz electron paramagnetic resonance (EPR) spectrum of septet pyridyl-2,4,6-trinitrene was recorded after the photolysis 2,4,6-triazido-3,5-dichloropyridine in solid argon matrix at 15 K. Owing to experimental EPR spectrum, zero-field splitting parameters trinitrene were determined with a accuracy: D(s)=-0.1019+/-0.0004 cm(-1) and E(s)=0.003 25+/-0.000 cm(-1). All transitions were, for first, unambiguously assigned based on eigenfield calculations Zeeman energy levels....
First W-band 94 GHz EPR spectra of randomly oriented triplet, quintet, and septet nitrenes formed during the photolysis 1,3,5-triazido-2,4,6-tribromobenzene in cryogenic matrices are reported. In comparison with conventional X-band 9 electron paramagnetic resonance (EPR) spectroscopy, spectroscopy allows detection complete spectroscopic characterization all species at different stages aromatic polyazides. This type is paramount importance for experimental determination sign zero-field...
Solid state reactions of fluorine with methane have been studied by ultraviolet laser photolysis dilute mixtures the two reagents in solid argon at 13–30 K. Using a combination EPR and FTIR spectroscopies, three distinct mechanisms product formation identified. At temperatures below 18 K, is dominated direct F2–CH4 heterodimers, resulting closed-shell complexes HF–CH3F. A small fraction reaction intermediate, nonplanar methyl radical trapped cage HF F, also formed. This intermediate decays...
The high resolution X-band electron para magnetic resonance (EPR) spectrum of quintet pyridyl-2,6-dinitrene was recorded after the photolysis 4-amino-2,6-diazido-3,5-dichloropyridine in solid argon matrix at 15K. This represents a new type powder EPR spectra that are characteristic for spin states with zero-field splitting parameters ∣Eq∕Dq∣≈1∕4. All lines dinitrene were unambiguously assigned based on eigenfield calculations Zeeman energy levels and angular dependencies fields. Owing to...
A double pulse modulator is described that capable of generating two pulses 200 ns duration at peak currents up to 10 kA with the delay between as short 2 μs. The TPI1-10k/50 tetrode and TPI5-10k/50 pentode cold cathode thyratrons, which can be operated voltages 50 kV, have been used switching elements. voltage hold-off recovery time less than 1 μs has demonstrated an operating current 7 a reverse 24 kV. Unlike common gaseous switches, TPI thyratrons operate for over 20,000 h hundreds kHz....
The fine-structure (FS) parameters D of a series D3h symmetric septet trinitrenes were analyzed theoretically using density functional theory (DFT) calculations and compared with the experimental values derived from ESR spectra. studies show that 1,3,5-trichloro-2,4,6-trinitrenobenzene = -0.0957 cm(-1) E 0 is major paramagnetic product photolysis 1,3,5-triazido-2,4,6-trichlorobenzene in solid argon matrices at 15 K. Trinitrenes this type display powder X-band spectra intense Z1-transition...
The heavy atom effect on the magnetic anisotropy of septet trinitrenes is reported. Septet 1-bromo-3,5-dichloro-2,4,6-trinitrenobenzene (S-1) was generated in a solid argon matrix by ultraviolet irradiation 1,3,5-triazido-2-bromo-4,6-dichlorobenzene. This trinitrene displays an electron spin resonance (ESR) spectrum that drastically differs from ESR spectra all previously studied trinitrenes. zero-field splitting (ZFS) parameters, derived experimental spectrum, show parameter |D| = 0.1237...
Significant lossless compression results of color map images have been obtained by dividing the maps into layers and compressing binary separately using an optimized context tree model that exploits interlayer dependencies. Even though use a alphabet simplifies construction spatial dependencies efficiently, it is expected equivalent or better result would be operating directly on image without layer separation. In this paper, we extend previous context-tree-based method to operate values...
A new copper( ii ) complex (I) was obtained by the reaction of a sterically crowded 2,4-di-( tert -butyl)-9-chloro-benzo[5,6][1,4]oxazine[2,3- b ]phenoxazine bridging ligand with Cu( hexafluoroacetylacetonate.
The EPR spectrum of the Y@C82 molecules isolated in solid argon matrix was recorded for first time at a temperature 5 K. isotropic hyperfine coupling constant (hfcc) Aiso = 0.12 ± 0.02 mT on nucleus 89Y as derived from is found more than two times greater that obtained previous measurements liquid solutions. Comparison measured hfcc metal atom with predicted by density-functional theory calculations (PBE/L22) indicate relativistic method provides good agreement between experiment and theory....
The ESR spectrum of 5-methylhexa-1,2,4-triene-1,3-diyl (1) was recorded in an argon matrix at 15 K. derived zero-field splitting (ZFS) parameters (D = 0.5054 ± 0.0006 cm(-1) and E 0.0045 0.0002 cm(-1)) fall between those determined previously for propargylene (2) vinylcarbene (3). DFT ab initio (CAS MRCI) quantum-chemical calculations the ZFS 1, 2, 3 were performed. These indicate that multireference methods are needed to successfully predict delocalized carbenes/biradicals such as 1-3....
Novel (pipH 2 )[Co(TDA) ] is a rare example of quasi-octahedral Co( ii ) complex with mixed sulfur-oxygen environment exhibiting strong “easy-plane” type magnetic anisotropy and demonstrating field-induced single-ion magnet (SIM) behavior.
Chemical reaction of F atoms with O3 molecules in a solid argon matrix was studied FTIR spectroscopy. Fluorine were generated by UV photolysis F2 dilute solutions and argon. The FO−O2 complex is observed for the first time as an intermediate product mobile isolated ozone molecules. characterized two intense absorption bands at 1522 968 cm-1. Use isotopic mixtures 16O/18O provides strong evidence assignment these to O−O stretch F−O fundamentals complex, which are red-shifted 34 61 cm-1,...