Mikhail Yu. Ivanov

International Tomography Center

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Matvey V. Fedin

International Tomography Center

Sergey A. Prikhod’ko

Boreskov Institute of Catalysis

Nicolay Yu. Adonin

Boreskov Institute of Catalysis

Olga D. Bakulina

International Tomography Center

Elena G. Bagryanskaya

Novosibirsk Institute of Organic Chemistry

Sergey L. Veber

International Tomography Center

Zhijia Wang

Beijing University of Chinese Medicine

Daniil M. Polyukhov

University of Manchester

R.Z. Sagdeev

International Tomography Center

N. V. Surovtsev

Institute of Automation and Electrometry

Cooperative Institutions

Novosibirsk State University

Russian Academy of Sciences

Siberian Branch of the Russian Academy of Sciences

International Tomography Center

Institute of Chemical Kinetics and Combustion

Novosibirsk Institute of Organic Chemistry

Novosibirsk Tuberculosis Research Institute

Centre National de la Recherche Scientifique

NS Kurnakova Institute of General and Inorganic Chemistry

Institute of General and Inorganic Chemistry

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Permanent Encapsulation of Mobile Molecules in Ionic Solids: Unraveling the Local Microstructure Using Molecular Probes

The Journal of Physical Chemistry C (2025)

Olga D. Bakulina Mikhail Yu. Ivanov Sergey A. Prikhod’ko Kristina Smirnova R.Z. Sagdeev

Encapsulation

10.1021/acs.jpcc.4c08031

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Microscopic rigidity and heterogeneity of ionic liquids probed by stochastic molecular librations of the dissolved nitroxides

Physical Chemistry Chemical Physics (2017)

Mikhail Yu. Ivanov Olesya A. Krumkacheva Sergei A. Dzuba Matvey V. Fedin

We propose a new potent approach for studying nano/microscopic heterogeneities in ionic liquids exploiting stochastic librations of nitroxides and pulse EPR.

Rigidity (electromagnetism)

10.1039/c7cp04890d

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Citations (29)

On the geometry optimization of X-band resonator for electron paramagnetic resonance application

arXiv (Cornell University) (2019)

Mikhail Yu. Ivanov

The microwave resonator is one of the key components in the modern Electron Paramagnetic Resonance (EPR) spectroscopy setup, as it largely determines the performance characteristics and limitations of the entire spectrometer. In this research note the possible way of resonator optimization is described. A detailed computer model describing the distribution of the electromagnetic field for Bruker 4118X-MD-5W1 design resonator has been developed. All details including a dielectric insert, conductive screen, coupling antenna and PTFE supports were included in the model. All dissipation processes were considered in the calculation. The influence of the resonator geometry on the Q-factor, filling factor and operating frequency of the resonant mode has been investigated. The resonator geometric parameters are optimized to achieve maximum sensitivity. According to the calculations, the optimized resonator structure has in 10 times greater sensitivity than the original MD-5 design.

Dielectric resonator antenna

Helical resonator

Dielectric resonator

Q factor

10.48550/arxiv.1904.01657

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Nanoscale heterogeneities in ionic liquids: insights from EPR of spin probes

Mendeleev Communications (2018)

Mikhail Yu. Ivanov Matvey V. Fedin

Diamagnetism

Nanometre

Characterization

Pulsed EPR

10.1016/j.mencom.2018.11.001

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Citations (29)

Approximating Coupled-Task Scheduling Problems with Equal Exact Delays

Lecture notes in computer science (2016)

Alexander Ageev Mikhail Yu. Ivanov

10.1007/978-3-319-44914-2_21

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Bismuth germanate as a perspective material for dielectric resonators in EPR spectroscopy

Journal of Magnetic Resonance (2016)

Mikhail Yu. Ivanov Vladimir A. Nadolinny Elena G. Bagryanskaya Yuriy A. Grishin Matvey V. Fedin

Bismuth germanate

Bismuth

Germanate

10.1016/j.jmr.2016.08.009

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Citations (14)

Composite Materials Based on MOF ZIF-8 and Ionic Liquid [BMIm]+[BF4]−: An EPR Study Using Nitroxide Spin Probes

Doklady Physical Chemistry (2023)

N. А. Kudryavyh Mikhail Yu. Ivanov Artem S. Poryvaev Daniil M. Polyukhov R.Z. Sagdeev

Spin probe

10.1134/s0012501623700094

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Citations (1)

Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy

International Journal of Molecular Sciences (2021)

Mikhail Yu. Ivanov Yuliya F. Polienko Igor A. Kirilyuk Sergey A. Prikhod’ko Nicolay Yu. Adonin

Many ionic liquids (ILs) can be mixed with water, forming either true solutions or emulsions. This favors their applications in many respects, but at the same time might strongly alter their physicochemical properties. A number of methods exist for studying the macroscopic properties of such mixtures, whereas understanding their characteristics at micro/nanoscale is rather challenging. In this work we investigate microscopic properties, such as viscosity and local structuring, in binary water mixtures of IL [Bmim]BF4 in liquid and glassy states. For this sake, we use continuous wave and pulse electron paramagnetic resonance (EPR) spectroscopy with dedicated spin probes, located preferably in IL-rich domains or distributed in IL- and water-rich domains. We demonstrate that the glassy-state nanostructuring of IL-rich domains is very similar to that in neat ILs. At the same time, in liquid state the residual water makes local viscosity in IL-rich domains noticeably different compared to neat ILs, even though the overwhelming amount of water is contained in water-rich domains. These results have to be taken into account in various applications of IL-water mixtures, especially in those cases demanding the combinations of optimum micro- and macroscopic characteristics.

10.3390/ijms222111900

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Citations (7)

Active Pharmaceutical Ingredient-Ionic Liquids (API-ILs): Nanostructure of the Glassy State Studied by Electron Paramagnetic Resonance Spectroscopy

Molecules (2022)

Olga D. Bakulina Mikhail Yu. Ivanov Dmitriy V. Alimov Sergey A. Prikhod’ko Nicolay Yu. Adonin

Active Pharmaceutical Ingredient-Ionic Liquids (API-ILs) draw increasing interest as a particular class of ILs that possess unusual physicochemical properties along with simultaneous potentials for pharmaceutical applications. Although nanostructuring phenomena were actively investigated in common ILs, their studies in API-ILs are scarce so far. In this work, using the complex methodology of Electron Paramagnetic Resonance (EPR) and dissolved spin probes, we investigate nanostructuring phenomena in a series of API-ILs: [Cnmim][Ibu], [Cnmim][Gly], and [Cnmim][Sal] with n = 2, 4, and 6, respectively. We reveal similar trends for API-ILs and common ILs, as well as peculiarities inherent to the studied API-ILs. Unusual behavior observed for [Cnmim][Ibu] has been assigned to the presence of a non-polar fragment in the [Ibu]− anion, which leads to the formation of more complex nanostructures around the radical compared to common ILs. Understanding general trends in the formation of such self-organized molecular structures is of fundamental interest and importance for applying API-ILs.

10.3390/molecules27165117

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Citations (6)

The Strength of Masonry Based on the Deformation Characteristics of Its Components

IntechOpen eBooks (2022)

Alexey N. Plotnikov В. А. Иванов Борис Михайлов Tatyana G. Rytova O. S. Yakovleva

The chapter presents a new approach to determining the strength of masonry reinforced with transverse meshes in mortar joints. The method consists of using the values of the modulus of elasticity and limiting deformations of the stone material, mortar for joints, and both steel and composite reinforcements. An analytical notation is proposed that integrally takes into account the characteristics of the initial materials. The results of physical tests of centrally loaded masonry pillars reinforced with steel and composite meshes are given. To test the masonry, widely used materials were used: solid brick and cement-sand mortar. The values of the bearing capacity, deformations, and internal stresses of the masonry are obtained. It is determined that the stresses in the reinforcing bars of the meshes are unevenly distributed in the horizontal plane of the mortar joint and amount to 20–37% of the design resistance of the mesh material. The strength of masonry reinforced with composite meshes is 65–75% of steel of the same cross section. It is shown that there is a good convergence of test results with the presented analytical dependence.

Limiting

10.5772/intechopen.107308

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