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Expanded Porphyrin Exhibiting Off-Centered Out-of-Plane Coordination to Dysprosium

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CCS Chemistry 2024年第7期6卷 1731-1738页

作者： Dmitry I.nazarov Jorge Labella Alexey V.Kuzmin Maxim A.Faraonov Evgenii n.ivanov Salavat S.Khasanov Tomas Torres Mikhail K.Islyaikin Dmitri V.Konarev Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS 142432 Chernogolovka Department of Organic Chemistry Universidad Autonoma de Madrid28049 Madrid Institute of Solid-State Physics RAS 142432 Chernogolovka Research Institute of Macroheterocycles Ivanovo State University of Chemistry and Technology15300 Ivanovo g.A.Krestov Institute of Solution Chemistry of the Russian Academy of Sciences 153045 Ivanovo Institute for Advanced Research in Chemical Sciences Universidad Autonoma de Madrid28049 Madrid IMDEA-nanociencia 28049 Madrid

The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular *** this context,the use of expanded porphyrinoids remains elusive since their coordination chemistry is challenging to ***,taking inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine ***,we observed the selective formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductive *** this reaction,the oxidation state of the macrocycle did not *** X-ray diffraction analysis,we found that the coordination number of Dy in this complex was *** macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giving rise to a wellordered solid-state packing,governed byπ-π*** a result of this organization,a small magnetic coupling between the neighboring molecules was *** in all,this work provides key insights into the coordination of magnetically active metals with expanded porphyrinoids,thus motivating the development of advanced spintronic devices.

关键词： porphyrins dysprosium macrocycle coordination chemistry magnetism

Dirac operator on the sphere with attached wires

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Chinese Physics B 2016年第4期25卷 335-338页

作者： E n grishanov D A Eremin D A ivanov I Yu Popov Ogarev Mordovia State University Bolshevistskaya Str. 68 Saransk Russia ITMO University Kroverkskiy pr. 49 St. Petersburg 197101 Russia

An explicitly solvable model for tunnelling of relativistic spinless particles through a sphere is suggested. The model operator is constructed by an operator extensions theory method from the orthogonal sum of the Dirac operators on a semi- axis and on the sphere. The transmission coefficient is obtained. The dependence of the transmission coefficient on the particle energy has a resonant character. One observes pairs of the Breit-Wigner and the Fano resonances. It correlates with the corresponding results for a non-relativistic particle.

关键词： Dirac operator nanostructure tunnelling solvable model

generalized Logan’s Problem for Entire Functions of Exponential Type and Optimal Argument in Jackson’s Inequality in L2（R3）

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Acta Mathematica Sinica,English Series 2018年第10期34卷 1563-1577页

作者： Valerii ivanov Alexey ivanov Department of Applied Mathematics and Computer Science Tula State University

We study Jackson＇s inequality between the best approximation of a function f∈ L2（R^3） by entire functions of exponential spherical type and its generalized modulus of continuity. We prove Jackson＇s inequality with the exact constant and the optimal argument in the modulus of continuity. In particular, Jackson＇s inequality with the optimal parameters is obtained for classical modulus of continuity of order r and Thue-Morse modulus of continuity of order r∈ n. These results are based on the solution of the generalized Logan problem for entire functions of exponential type. For it we construct a new quadrature formulas for entire functions of exponential type.

关键词： Best approximation generalized modulus of continuity Jackson's inequality optimal argument Logan's problem quadrature formula

Exclusive semileptonic decays of D and Ds mesons in the covariant confining quark model

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Frontiers of physics 2019年第6期14卷 103-132页

作者： M.A.ivanov J.g.Korner J.n.Pandya P.Santorelli n.R.Soni C.T.Tran Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear Research141980 DubnaRussia PRISMA Cluster of Excellence Institut für PhysikJohannes Gutenberg-UniversitatD-55099 MainzGermany Applied Physics Department Faculty of Technology and EngineeringThe Maharaja Sayajirao University of BarodaVadodara 390001GujaratIndia Dipartimento di Fisica"E.Pancini" Universitàdi Napoli FedericoⅡComplesso Universitario di Monte S.AngeloVia CintiaEdificio 680126 NapoliItaly Istituto nazionale di Fisica nucleare Sezione di Napoli80126 NapoliItaly

Recently,the BESⅢcollaboration has reported numerous measurements of various D(s)meson semileptonic decays with significantly improved *** with similar studies carried out at BABAR,Belle,and CLEO,new windows to a better understanding of weak and strong interactions in the charm sector have been *** light of new experimental data,we review the theoretical description and predictions for the semileptonic decays of D(s)to a pseudoscalar or a vector *** review is essentially an extended discussion of our recently published results obtained in the framework of the covariant confining quark model.

关键词： covariant quark model semileptonic decay charmed meson form factor angular distribution

Anomalous acceleration of ions in a plasma accelerator with an anodic layer

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Plasma Science and Technology 2018年第3期20卷 95-105页

作者： V M BARDAKOV S D ivanov A V KAZAnTSEV n A STROKIn A n STUPIn Binhao JIAng Zhenyu WAng Irkutsk State Transport University Chernyshevsky Str.15664074IrkutskRussia national Research Irkutsk Technical University Lermontova Str.83664074IrkutskRussia Department of Electrical Engineering Harbin Institute of TechnologyHarbin 150001People's Republic of China

In a plasma accelerator with an anodic layer(PAAL),we discovered experimentally the effect of‘super-acceleration'of the bulk of the ions to energies W exceeding the energy equivalent to the discharge voltage V_(d).The E×B discharge was ignited in an environment of atomic argon and helium and molecular *** charged argon ions were accelerated most effectively in the case of the largest discharge currents and pressure P of the working *** ions with W〉eV_(d)(e being the electron charge)were only recorded at maximum *** nitrogen was not accelerated to energies W〉e V_(d).Anomalous acceleration is realized in the range of radial magnetic fields on the anode 2.8×10^(–2)≤B_(rA)≤4×10^(–2)*** was also found analytically that the cathode of the accelerator can receive anomalously accelerated *** this case,the value of the potential in the anodic layer becomes higher than the anode potential,and the anode current exceeds some critical *** modeling in terms of the developed theory showed qualitative agreement between modeling data and measurements.

关键词： plasma sources particle orbit and trajectory particle measurements

n1s Electron Binding Energies of Cn_x Thin Films grown by Magnetron Sputtering at Different Temperature

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Journal of Materials Science & Technology 1998年第1期14卷 25-28页

作者： Zheng, WT Xing, KZ Hellgren, n ivanov, I Salaneck, WS Sundgren, JE Linkoping Univ Dept Phys S-58183 Linkoping Sweden

Carbon nitride thin films deposited using dc unbalanced magnetron sputtering system have been analyzed by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The XPS data show that n1s binding states depend on substrate temperature T-s, in which the peak at 400.0 eV increases with T-s, whereas the peak at 398.3 eV decreases with T-s slightly. On the basis of XPS, FTIR and Raman spectra, the assignment of n1s electron binding energies was made. The peak at 400.0 eV is attributed to n atoms bonded to sp(2) coordinated C atoms. The peak at 398.3 eV is attributed to n atoms bonded to sp(3) coordinated C atoms as well as n-C bonds.

关键词： Thin films

Results of the Main Phase of Ion Separation in the Process of Plasma-Optical Mass Separation

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Plasma Science and Technology 2015年第10期17卷 862-868页

作者： V.M.BARDAKOV S.D.ivanov A.V.KAZAnTSEV n.A.STROKIn Institute for Physics and Technology Irkutsk State Technical University

This paper presents separation results of a mixture of nitrogen, argon and krypton ions in the process of plasma-optical mass separation on the POMS-E-3 separator model. We determined the behavior of the separation with a change in the value of magnetic field induction in the azimuthator and in the degree of compensation of the spatial charge in ion flows. An analysis is performed for experimental data by correlation with the results of a theoretical study and numerical experiments. The objectives of future experiments are outlined.

关键词： plasma-optical mass separation plasma accelerator trajectories spatial charge

Liquid Liver Biopsy for Disease Diagnosis and Prognosis

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Journal of Clinical and Translational Hepatology 2023年第7期11卷 1520-1541页

作者： Desislava K.Tsoneva Martin n.ivanov Manlio Vinciguerra Department of Medical genetics Medical University of VarnaVarnaBulgaria Department of Stem Cell Biology and Transplantology Research InstituteMedical University of VarnaVarnaBulgaria Department of Anatomy and Cell Biology Research InstituteMedical University of VarnaVarnaBulgaria Faculty of Health Liverpool John Moores UniversityLiverpoolUnited Kingdom

Liver diseases are a major burden worldwide,the scope of which is expected to further grow in the upcoming *** relevant liver dysfunction-related blood markers such as alanine aminotransferase and aspartate aminotransferase have limited ***,liver biopsy remains the gold standard for several liver-related pathologies,posing a risk of complication due to its invasive *** biopsy is a minimally invasive approach,which has shown substantial potential in the diagnosis,prognosis,and monitoring of liver diseases by detecting disease-associated particles such as proteins and RnA molecules in biological *** are the core components of the nucleosomes,regulating essential cellular processes,including gene expression and DnA *** cell death or activation of immune cells,histones are released in the extracellular space and can be detected in *** are stable in circulation,have a long half-life,and retain their post-translational ***,we provide an overview of the current research on histone-mediated liquid biopsy methods for liver diseases,with a focus on the most common detection methods.

关键词： Liquid biopsy,Histones nAFLD/MAFLD Chronic liver disease Hepatocellular carcinoma

Effect of the addition of rare earths on the activity of alumina supported copper cobaltite in CO oxidation, CH_4 oxidationand nO decomposition

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Journal of Rare Earths 2015年第4期33卷 382-390页

作者： B.ivanov I.Spassova M.Milanova g.Tyuliev M.Khristova Institute of general and Inorganic Chemistry Bulgarian Academy of Sciences Faculty of Chemistry and Pharmacy Sofia University Institute of Catalysis Bulgarian Academy of Sciences

The effect of the addition of small amounts of rare earths （Ln=La, Ce, nd and gd） to alumina supported copper-cobalt spinel oxide on the catalysts efficiency in CO and CH4 oxidation and in nO decomposition was investigated. Samples of Ln/CuCo/AI catalyst were prepared and characterized by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, atomic absorption spectroscopy （AAS）, scanning electron mieroscopy-energy dispersive spectroscopy （SEM-EDS）, H2-temperature-programmed reduc- tion （H2-TPR）, electron paramagnetic resonanee （EPR） spectroscopy and low temperature nitrogen adsorption, The results showed that the addition of rare earths changed the surface state of the alumina supported copper-cobalt spinel catalyst. As a result, partial re- duction of copper species was observed as well as migration of these species between the surface and the bulk. The Ln/CuCo/A1 catalysts behaved differently in oxidation and reduction processes. In oxidation processes where oxide structure was important, Ce/CuCo/A1 and nd/CuCo/A1 were the most active catalysts. The catalyst Ce/CuCo/AI was the most active in the oxidation reactions because of the availability and favorable surface distribution of the redox couples Cu＋/Cu2＋ and Ce3＋/Ce4＋. In nO decompostion, Ln-modified catalysts significantly improved the selectivity of the process to n2.

关键词： copper cobaltite nO decomposition CO oxidation CH4 oxidation rare earths