Pub Date : 2023-11-30DOI: 10.1134/S0018143923060036
I. Bodrikov, E. Titov, A. I. Serov, D. Titov, Y. Kurskii, E. G. Ivashkin
{"title":"Influence of Voltage and Duration of Plasma Pyrolysis of 1,1,2,2-Tetrachloroethane in the Liquid Phase by the Action of Low-Voltage Discharges","authors":"I. Bodrikov, E. Titov, A. I. Serov, D. Titov, Y. Kurskii, E. G. Ivashkin","doi":"10.1134/S0018143923060036","DOIUrl":"https://doi.org/10.1134/S0018143923060036","url":null,"abstract":"","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"64 1","pages":"515 - 521"},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139198254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060115
L. A. Mochalov, M. A. Kudryashov, I. O. Prokhorov, M. A. Vshivtsev, Yu. P. Kudryashova, E. A. Slapovskaya, A.V. Knyazev
Abstract
A process for fabricating Zn-doped (up to 10 at %) β-Ga2O3 thin films by plasma-enhanced chemical vapor deposition has been studied. High-purity gallium, zinc, and oxygen were used as starting materials, and hydrogen was chosen as the carrier and plasma gas. A low-temperature nonequilibrium RF (40.68 MHz) discharge plasma at a reduced pressure (0.01 torr) was used to initiate chemical reactions of precursors. The plasma-chemical process was monitored using optical emission spectroscopy. Structural properties and morphology of the deposited β-Ga2O3 films were studied by various methods.
研究了等离子体增强化学气相沉积法制备掺锌(高达10 at %) β-Ga2O3薄膜的工艺。以高纯镓、锌、氧为原料，氢气为载体和等离子体气体。采用低温非平衡射频(40.68 MHz)放电等离子体，减压(0.01 torr)引发前驱体的化学反应。等离子体化学过程采用发射光谱法进行监测。用各种方法研究了沉积的β-Ga2O3薄膜的结构性能和形貌。
{"title":"Investigation of the Plasma-Chemical Synthesis of Thin Ga2O3 Films Doped with Zn in One Step in Plasma","authors":"L. A. Mochalov, M. A. Kudryashov, I. O. Prokhorov, M. A. Vshivtsev, Yu. P. Kudryashova, E. A. Slapovskaya, A.V. Knyazev","doi":"10.1134/s0018143923060115","DOIUrl":"https://doi.org/10.1134/s0018143923060115","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A process for fabricating Zn-doped (up to 10 at %) β-Ga<sub>2</sub>O<sub>3</sub> thin films by plasma-enhanced chemical vapor deposition has been studied. High-purity gallium, zinc, and oxygen were used as starting materials, and hydrogen was chosen as the carrier and plasma gas. A low-temperature nonequilibrium RF (40.68 MHz) discharge plasma at a reduced pressure (0.01 torr) was used to initiate chemical reactions of precursors. The plasma-chemical process was monitored using optical emission spectroscopy. Structural properties and morphology of the deposited β-Ga<sub>2</sub>O<sub>3</sub> films were studied by various methods.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"40 5","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060097
M. A. Kudryashov, L. A. Mochalov, I. O. Prokhorov, M. A. Vshivtsev, Yu. P. Kudryashova, V. M. Malyshev, E. A. Slapovskaya
Abstract
Gallium monosulfide (GaS), a representative of Group III monochalcogenide layered materials, is a wide-bandgap semiconductor. It is considered an ideal material for light detectors in the blue and near ultraviolet ranges of the spectrum. In this work, for the first time, the method of plasma-enhanced chemical vapor deposition (PECVD) was applied to obtain thin GaS films on various substrates, where high-purity gallium and sulfur served as starting materials. To initiate the interaction between the reactants, a nonequilibrium RF discharge (40.68 MHz) plasma at a pressure of 0.1 torr was used. The influence of the substrate nature on the stoichiometry, structure, and surface morphology of GaS films has been studied. The plasma-chemical process was monitored using optical emission spectroscopy.
{"title":"Plasma-Enhanced Chemical Vapor Deposition of Thin GaS Films on Various Types of Substrates","authors":"M. A. Kudryashov, L. A. Mochalov, I. O. Prokhorov, M. A. Vshivtsev, Yu. P. Kudryashova, V. M. Malyshev, E. A. Slapovskaya","doi":"10.1134/s0018143923060097","DOIUrl":"https://doi.org/10.1134/s0018143923060097","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Gallium monosulfide (GaS), a representative of Group III monochalcogenide layered materials, is a wide-bandgap semiconductor. It is considered an ideal material for light detectors in the blue and near ultraviolet ranges of the spectrum. In this work, for the first time, the method of plasma-enhanced chemical vapor deposition (PECVD) was applied to obtain thin GaS films on various substrates, where high-purity gallium and sulfur served as starting materials. To initiate the interaction between the reactants, a nonequilibrium RF discharge (40.68 MHz) plasma at a pressure of 0.1 torr was used. The influence of the substrate nature on the stoichiometry, structure, and surface morphology of GaS films has been studied. The plasma-chemical process was monitored using optical emission spectroscopy.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"21 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s001814392306005x
A. A. Ignatiev, P. A. Ivanova, A. N. Ivanov, A. A. Gushchin, D. A. Shutov, V. V. Rybkin
Abstract
The kinetics of decomposition of ibuprofen in its aqueous solution by the action of atmospheric-pressure direct-current discharge in ambient air has been studied. The treated solution served as both the cathode and the anode of the discharge system. Degradation rates and effective degradation rate constants have been determined. Based on these data, the energy yields and degrees of destruction were calculated for various discharge powers (discharge currents). Discharges in a liquid cathode and anode differ little in the energy yields of degradation. But the rates and rate constants of degradation in the liquid cathode are higher than in the liquid anode. Therefore, the complete destruction of ibuprofen in the liquid cathode is achieved within shorter discharge times. A comparison is made of the destruction efficiencies for the cases of solution treatment using glow, dielectric barrier, and pulsed corona discharges.
{"title":"Kinetics of Ibuprofen Degradation in Aqueous Solution by the Action of Direct-Current Glow Discharge in Air","authors":"A. A. Ignatiev, P. A. Ivanova, A. N. Ivanov, A. A. Gushchin, D. A. Shutov, V. V. Rybkin","doi":"10.1134/s001814392306005x","DOIUrl":"https://doi.org/10.1134/s001814392306005x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The kinetics of decomposition of ibuprofen in its aqueous solution by the action of atmospheric-pressure direct-current discharge in ambient air has been studied. The treated solution served as both the cathode and the anode of the discharge system. Degradation rates and effective degradation rate constants have been determined. Based on these data, the energy yields and degrees of destruction were calculated for various discharge powers (discharge currents). Discharges in a liquid cathode and anode differ little in the energy yields of degradation. But the rates and rate constants of degradation in the liquid cathode are higher than in the liquid anode. Therefore, the complete destruction of ibuprofen in the liquid cathode is achieved within shorter discharge times. A comparison is made of the destruction efficiencies for the cases of solution treatment using glow, dielectric barrier, and pulsed corona discharges.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"21 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060061
A. A. Kharchenko, D. I. Brinkevich, S. D. Brinkevich, V. S. Prosolovich
Abstract
FP9120 diazoquinone–novolac positive photoresist films 1.5 µm thick implanted with Ag+ ions and supported on the surface of KDB-10 (111) silicon wafers by centrifugation have been studied by measuring reflection spectra. It has been shown that ion implantation leads to a decrease in the refractive index of the photoresist due to radiation crosslinking of novolac resin molecules and a decrease in the density ρ and the molecular refraction RM of the photoresist. It has been established that the reflection coefficient in the opaque region of the photoresistive film increases with the Ag+ implantation dose. The changes observed in the optical properties of the films under ion implantation conditions are explained taking into account radiation-chemical processes in the phenol–formaldehyde photoresist.
{"title":"Radiation-Induced Alteration of the Reflection Spectra of Diazoquinone–Novolac Photoresist Films by Implantation of Ag+ Ions","authors":"A. A. Kharchenko, D. I. Brinkevich, S. D. Brinkevich, V. S. Prosolovich","doi":"10.1134/s0018143923060061","DOIUrl":"https://doi.org/10.1134/s0018143923060061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>FP9120 diazoquinone–novolac positive photoresist films 1.5 µm thick implanted with Ag<sup>+</sup> ions and supported on the surface of KDB-10 (111) silicon wafers by centrifugation have been studied by measuring reflection spectra. It has been shown that ion implantation leads to a decrease in the refractive index of the photoresist due to radiation crosslinking of novolac resin molecules and a decrease in the density ρ and the molecular refraction <i>R</i><sub>M</sub> of the photoresist. It has been established that the reflection coefficient in the opaque region of the photoresistive film increases with the Ag<sup>+</sup> implantation dose. The changes observed in the optical properties of the films under ion implantation conditions are explained taking into account radiation-chemical processes in the phenol–formaldehyde photoresist.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"46 2","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060048
A. A. Ignatiev, A. A. Gushchin, V. I. Grinevich, E. Yu. Kvitkova, A. A. Izvekova, V. V. Rybkin
Abstract
The kinetics of decomposition of paracetamol in its aqueous solution by the action of atmospheric-pressure dielectric barrier discharge (DBD) in oxygen has been studied. Degradation rate constants, energy yields, and degrees of degradation have been determined for various discharge powers and paracetamol concentrations. It is shown that the degradation products are carboxylic acids, aldehydes, CO, and CO2.
{"title":"Kinetics of Paracetamol Degradation in Aqueous Solution by the Action of Dielectric Barrier Discharge in Oxygen","authors":"A. A. Ignatiev, A. A. Gushchin, V. I. Grinevich, E. Yu. Kvitkova, A. A. Izvekova, V. V. Rybkin","doi":"10.1134/s0018143923060048","DOIUrl":"https://doi.org/10.1134/s0018143923060048","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The kinetics of decomposition of paracetamol in its aqueous solution by the action of atmospheric-pressure dielectric barrier discharge (DBD) in oxygen has been studied. Degradation rate constants, energy yields, and degrees of degradation have been determined for various discharge powers and paracetamol concentrations. It is shown that the degradation products are carboxylic acids, aldehydes, CO, and CO<sub>2</sub>.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"34 10","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060073
N. Yu. Kruchinin, M. G. Kucherenko, P. P. Neyasov
Abstract
Conformational rearrangements of polyampholytic polypeptides adsorbed on the surface of a charged prolate gold nanospheroid with a periodic change in time of its polarity along the rotation axis have been studied using molecular dynamics simulation. The radial distributions of the density of polypeptide atoms in the equatorial region of the nanospheroid have been calculated, as well as the distributions of the linear density of polypeptide atoms along the major axis of the nanospheroid. At a low simulation temperature, a girdle polyampholytic fringe was formed in the central region of the nanospheroid and its ordering by layers, depending on the type of units, occurred with an increase in the charge of the nanospheroid with a simultaneous increase in the width of the macromolecular fringe along the rotation axis. The thickness of such a fringe along the cross section depends on the distance between the oppositely charged units in the polyampholyte. At high temperatures and high absolute values of the total charge of the spheroidal nanoparticle, there were periodic displacements of the polyampholytic fringe toward the poles of the nanospheroid, being in antiphase for oppositely charged metallic nanospheroids. A mathematical model is presented for describing the conformational structure of a polyampholyte macromolecule on a prolate nanospheroid in an alternating electric field with the approximation of a prolate spheroid by a spherical cylinder.
{"title":"Conformational Rearrangements of Adsorbed Polyampholytes under Periodic Changes in Polarity of a Charged Prolate Gold Nanospheroid","authors":"N. Yu. Kruchinin, M. G. Kucherenko, P. P. Neyasov","doi":"10.1134/s0018143923060073","DOIUrl":"https://doi.org/10.1134/s0018143923060073","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Conformational rearrangements of polyampholytic polypeptides adsorbed on the surface of a charged prolate gold nanospheroid with a periodic change in time of its polarity along the rotation axis have been studied using molecular dynamics simulation. The radial distributions of the density of polypeptide atoms in the equatorial region of the nanospheroid have been calculated, as well as the distributions of the linear density of polypeptide atoms along the major axis of the nanospheroid. At a low simulation temperature, a girdle polyampholytic fringe was formed in the central region of the nanospheroid and its ordering by layers, depending on the type of units, occurred with an increase in the charge of the nanospheroid with a simultaneous increase in the width of the macromolecular fringe along the rotation axis. The thickness of such a fringe along the cross section depends on the distance between the oppositely charged units in the polyampholyte. At high temperatures and high absolute values of the total charge of the spheroidal nanoparticle, there were periodic displacements of the polyampholytic fringe toward the poles of the nanospheroid, being in antiphase for oppositely charged metallic nanospheroids. A mathematical model is presented for describing the conformational structure of a polyampholyte macromolecule on a prolate nanospheroid in an alternating electric field with the approximation of a prolate spheroid by a spherical cylinder.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"166 2","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060103
G. V. Loukova, A. A. Milov
Abstract
For the first time, charge characteristics of an organometallic complex with a radiative LMCT (ligand-to-metal charge transfer) state have been systematically evaluated using 124 methods at different levels of theory (for Ti(η5:η1-CpCMe2CB10H10C)2 taken as an example). Reliability of the results of calculation in the Mulliken approximation was considered.
{"title":"Charge Characteristics of Titanocene Dicarboranyl by the Mulliken Method","authors":"G. V. Loukova, A. A. Milov","doi":"10.1134/s0018143923060103","DOIUrl":"https://doi.org/10.1134/s0018143923060103","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>For the first time, charge characteristics of an organometallic complex with a radiative LMCT (ligand-to-metal charge transfer) state have been systematically evaluated using 124 methods at different levels of theory (for Ti(η<sup>5</sup>:η<sup>1</sup>-CpCMe<sub>2</sub>CB<sub>10</sub>H<sub>10</sub>C)<sub>2</sub> taken as an example). Reliability of the results of calculation in the Mulliken approximation was considered.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"26 4","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.1134/s0018143923060085
G. A. Ksendzova, N. I. Ostrovskaya, R. L. Sverdlov, V. L. Sorokin
Abstract
The effects of azomethine derivatives of 4,6-di-tert-butyl-2,3-dihydroxybenzaldehyde on the formation of radiolysis products of deaerated n-hexane and ethanol have been studied. It was shown that the catechol moiety in the tested compounds did not significantly affect their reactions with carbon-centered radicals. The aldimine group exhibited high activity as an α-hydroxyalkyl radical scavenger and low activity as a scavenger of alkyl radicals. The introduction of additional radical-inhibiting groups –OH, –SH, –NO2, and =N–NH– into the side fragment of a molecule led to a significant increase in the antiradical activity with respect to various types of carbon-centered radicals.
{"title":"Effects of Azomethine Derivatives of 4,6-Di-tert-Butyl-2,3-Dihydroxybezaldehyde on Radiation-Induced Reactions Involving Alkyl and Alpha-Hydroxyalkyl Radicals","authors":"G. A. Ksendzova, N. I. Ostrovskaya, R. L. Sverdlov, V. L. Sorokin","doi":"10.1134/s0018143923060085","DOIUrl":"https://doi.org/10.1134/s0018143923060085","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effects of azomethine derivatives of 4,6-di-<i>tert</i>-butyl-2,3-dihydroxybenzaldehyde on the formation of radiolysis products of deaerated <i>n</i>-hexane and ethanol have been studied. It was shown that the catechol moiety in the tested compounds did not significantly affect their reactions with carbon-centered radicals. The aldimine group exhibited high activity as an α-hydroxyalkyl radical scavenger and low activity as a scavenger of alkyl radicals. The introduction of additional radical-inhibiting groups –OH, –SH, –NO<sub>2</sub>, and =N–NH– into the side fragment of a molecule led to a significant increase in the antiradical activity with respect to various types of carbon-centered radicals.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"29 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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