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Nitroxy-and azidomethyl azofurazans as advanced energetic materials

Defence Technology（防务技术） 2022年第8期18卷 1369-1381页

作者： aleksei b.sheremetev Svetlana F.Mel'nikova Elizaveta S.Kokareva Ruslan E.Nekrutenko Kirill V.Strizhenko Kyrill Yu Suponitsky Thanh Dat Pham Alla N.Pivkina Valery P.Sinditskii Zelinsky Institute of Organic Chemistry Russian Academy of Sciences47 Leninsky ProspMoscow119991Russia Saint Petersburg State Institute of Technology 26 Moskovskii PrSt Petersburg190013Russia Mendeleev University of Chemical Technology Moscow125047Russia N.N.Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences4 Kosygina Str119991MoscowRussia

Progress in the rocket industry is only possible on the basis of new, higher performance and more environmentally friendly materials compared to up-to-date propellant ingredients for liquid, solid, gelled and hybrid propellant systems. In this work, synthetic methods have been developed for the preparation of new energetic azofurazans bearing nitroxymethyl or azidomethyl groups. All prepared compounds were fully characterized by multinuclear NMR and IR spectroscopies, as well as elemental analyses. An analysis of the structural features based on the X-ray single-crystal diffraction made it possible to discuss their influence on the densities of the azofurazans of this study. Thermal decomposition and combustion of nitroxymethyl and azidomethyl azofurazans were studied using a number of complementary experimental techniques, namely thermogravimetry, differential scanning calorimetry, manometry, microthermocouple measurements in the combustion wave. The structural and physical characteristics of these new energetic analogues illustrate the extent to which the nature of the explosophoric groups can be used to tune the performace of the azofurazan framework. These azofurazans possess positive calculated enthalpy of formation and are promising candidates for new environmentally friendly energetic materials.

关键词： Azofurazan Azide Nitrate ester X-ray Combustion

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含能快递(英文)

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含能材料 2013年第1期21卷 135-136页

作者： aleksei b.sheremetev 俄罗斯N.D.Zelinsky Institute of Organic Chemistry

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含能快递

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含能材料 2013年第3期21卷 400-408页

作者： aleksei b.sheremetev 张光全俄罗斯N.D.Zelinsky Institute of Organic Chemistry

美斯蒂文斯理工学院用聚焦离子束-电镜扫描(FIb-SEM)研究压制PbX的空隙分布近来,美国美国斯蒂文斯理工学院采用聚焦离子束-电镜扫描(FIb-SEM)研究压制PbX的空隙,结合3D成像模型能够立体显示炸药配方中空隙分布。该空隙表征技术还能对纳... 详细信息

美斯蒂文斯理工学院用聚焦离子束-电镜扫描(FIb-SEM)研究压制PbX的空隙分布近来,美国美国斯蒂文斯理工学院采用聚焦离子束-电镜扫描(FIb-SEM)研究压制PbX的空隙,结合3D成像模型能够立体显示炸药配方中空隙分布。该空隙表征技术还能对纳米配方进行表征,通过对一种纳米RDX的压制PbX配方的表征,发现空隙的平均尺寸为250 nm,同时还得到了空隙的体积、形状及其立体分布。

关键词：熔铸炸药含能爆轰性能含能材料

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含能快递

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含能材料 2012年第5期20卷 656-660页

作者： aleksei b.sheremetev 张光全俄罗斯N.D.Zelinsky Institute of Organic Chemistry

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Estimation of the ballistic Effectiveness of 3,4-and 3,5-Dinitro-1-(trinitromethyl)-1H-Pyrazoles as Oxidizers for Composite Solid Propellants

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火炸药学报 2016年第2期39卷 16-21页

作者： LEMPERT David b. DALINGER Igor L. SHU Yuan-jie KAZAKOV Anatolii I. sheremetev aleksei b. Institute of Problems of Chemical Physics Russian Academy of Sciences(IPCP RAS) Moscow 142432 Russia Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moscow 119991 Russia Xi'an Modern Chemistry Research Institute Xi'an 710065 China

The experimental values of the enthalpy of formation of two isomeric 3,4-and 3,5-dinitro-1-(trinitromethyl)-1H-pyrazoles have been obtained(261.5±5.0and 246.4±6.7kJ/mol for crystalline 3,4-and 3,5-dinitro-1-(trinitromethyl)-1H-pyrazoles,respectively).The ballistic effectiveness of these potential oxidizers in composite solid propellants was studied.It is shown that these two oxidizers may be successfully applied in metal-free compositions or with a small content of metal.For the bottom stage 3,4-dinitro-1-(trinitromethyl)-1H-pyrazole is a bit better than 3,5-dinitro-1-(trinitromethyl)-1H-pyrazole,for the upper stage the both oxidizers show the equal ballistic parameters.These oxidizers allow to create metal-free solid composite propellants with the binder percentage not lower than 19%(volume fraction),with I3spequal to 256.5-257.0sat density equal to 1.72-1.74g/cm^3.

关键词： composite solid propellants high-enthalpy oxidizer energetic parameters estimation specific impulse ballistic effectiveness

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Evidence for polarization-induced phase transformations and degradation in CH_(3)NH_(3)PbI_(3)

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Nano Research 2023年第7期16卷 9435-9442页

作者： aleksei Yu.Grishko Maria A.Komkova Ekaterina I.Marchenko Alexandra V.Chumakova Alexey b.Tarasov Eugene A.Goodilin Andrei A.Eliseev Department of Materials Science MSU-BIT UniversityShenzhen 517182China Department of Chemistry Lomonosov Moscow State UniversityMoscow 119991Russia Department of Materials Science Lomonosov Moscow State UniversityMoscow 119991Russia European Synchrotron Radiation Facility F-38042 GrenobleFrance

In solar cells,hybrid halide perovskites operate under constant bias,thus their stability towards electric field-induced degradation is of key importance.Here we report on evidence of previously unidentified electric field-induced transitions and degradation path of CH_(3)NH_(3)PbI_(3)(MAPbI_(3))using elemental and phase mapping.Thin films of MAPbI_(3) were deposited onto 1-2μm-pitch interdigitated electrodes and subjected to direct current(DC)-polarization.The MAPbI_(3) layer polarized withbution to methylammonium-rich MAPbI_(3)-y(ybI3(xboth methylammonium and iodine provokes degradation of MAPbI_(3).Using nanofocus grazing-incidence wide-angle X-ray scattering(GIWAXS),we unambiguously showed that the bias voltage induces the transformation ofβ-MAPbI_(3) to metastableδ-MAPbI_(3) polymorph via alignment of polar organic cation with the electric field.This transformation is partially reversible upon field removal.However,once formed,δ-MAPbI_(3) disrupts the morphology of pristine film and undergoes decomposition toβ-MAPbI_(3)(β-MAPI)and PbI_(2).With the aforementioned compositional and phase changes,only MA-rich part serves as the charge separation layer,while the I-rich excitation is blocked with the PbI_(2) barrier serving as holes trapping layer.These observations reveal the intermediate steps in electric-field-driven degradation of halide perovskites and show the role of polar cations in the process,which is instructive for further material design with higher stability metrics.

关键词： halide perovskites stability degradation electric field ionic conductivity stoichiometry

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Hemostasis of massive bleeding from esophageal tumor:A case report

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World Journal of Gastrointestinal Endoscopy 2022年第10期14卷 636-641页

作者： aleksei A Kashintsev Dmitriy S Rusanov Mariya V Antipova Sergey V Anisimov Oleg K Granstrem NikolaiYu Kokhanenko Konstantin V Medvedev Eldar b Kutumov Anastasya A Nadeeva Vitali Proutski Pandx Ltd. WhittlesfordCambridgeCB224NWUnited Kingdom Pandx LLC. Saint-Petersburg 194100Russia

bACKGROUND Esophageal cancer is a common type of cancer and serious bleeding from esophageal tumors can occur in routine clinical practice.The arrest of bleeding from esophageal tumor is not a trivial task,which can sometimes require non-standard solutions.We report a case of successful hemostasis of massive bleeding from esophageal tumor performed by a novel two-balloon catheter inserted endoscopically,with a local hemostatic treatment applied.CASE SUMMARY A 36-years old male patient with advanced esophageal cancer developed bleeding from the tumor following endoscopic stenting with a self-expanding metal stent.Due to the ineffectiveness of standard approaches,after a medical conference,the patient was treated with a novel method based on the use of a two-balloon catheter creating an isolated area in esophagus and locally dispersing hemostatic polysaccharide powder inside the isolated interior.Hemostasis was successful and subsequent endoscopic examination revealed the presence of organized clot and localized defect,which was coagulated in a planned manner.CONCLUSION The authors present a new catheter-based method of hemostasis of esophageal tumor bleeding.

关键词： Esophageal cancer Esophageal bleeding Two-balloon catheter Endoscopic hemostasis Hemostatic polysaccharide powder Case report

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Effect of supporting materials on the electrocatalytic activity, stability and selectivity of noble metal-based catalysts for oxygen reduction and hydrogen evolution reactions

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Progress in Natural Science:Materials International 2020年第3期30卷 289-297页

作者： aleksei Chalgin Chengyi Song Peng Tao Wen Shang Tao Deng Jianbo Wu State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Center of Hydrogen Science Shanghai Jiao Tong University Materials Genome Initiative Center Shanghai Jiao Tong University

Carbonaceous and alternative supporting materials for platinum(Pt) and palladium(Pd) have been explored for the cathodic electrocatalysis in low-temperature fuel cells. Pd and Pt are widely used for catalysis owing to their remarkable electrocatalytic activity toward water splitting and fuel cell reactions. Supporting materials play a paramount role in defining electrocatalytic properties such as durability, selectivity, and activity. The conventional supporting material such as carbon black is unable to fit all the requirements under the severe operating conditions of fuel cells due to its poor corrosion resistance and limited mass transport of fuels to active catalyst sites. Nowadays the scientific research is being concentrated on devising different altered carbonic and carbonfree supporting materials for catalysts to improve the catalytic activity, stability, and selectivity of noble metal electrocatalysts. Lately, Pt, Pd and their alloy catalysts supported on modified carbonaceous and carbon-free materials have attracted solid interest owing to their prominent characteristics contributing to the remarkable fuel cell efficacy. Therefore, it is reasonable to explore this theme, regarding a variety of supporting materials,their advantages, drawbacks and future perspectives. In this mini-review, we selectively summarize recent advancements on several types of key supporting materials: carbon(graphene, carbon nanotubes, mesoporous carbon, and doped carbon nanostructures), non-carbon(transition metals oxides, borides, nitrides, and carbides)and hybrid nanocomposites.

关键词： Electrocatalyst Supporting material Fuel cell Oxygen reduction Hydrogen evolution

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烧结温度对生物医用纳米Ti-15Mo合金组织和摩擦学性能的影响（英文）

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Transactions of Nonferrous Metals Society of China 2019年第11期29卷 2310-2320页

作者： Mamoun FELLAH Naouel HEZIL Dekhil LEILA Mohammed AbDUL SAMAD Ridha DJELLAbI Stephania KOSMAN Alex MONTAGNE Alain IOST aleksei ObROSOV Sabine WEISS Mechanical Engineering Department ABBES Laghrour-UniversityKhenchelaP.O.125240004Algeria Tribology and Materials Group Laboratory of FoundryBadji Mokhtar UniversityAnnabaB.O.12 CP 23000Algeria Mater Sciences Department ABBES Laghrour-UniversityKhenchelaP.O.125240004Algeria Laboratoire de Mise en forme des Matériaux Métalliques(LMF2M) UniversitéBadji—MokhtarB.P.1223000 AnnabaAlgeria Mechanical Engineering Department King Fahd University of Petroleum and MineralsBox 1180Dhahran 31261KSA Department of Environmental Engineering College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518055China Arts et Metiers ParisTech MSMP8Boulevard Louis XIV59046 Lille CedexFrance Department of Physical Metallurgy and Materials Technology Brandenburg Technical University03046 CottbusGermany

研究烧结温度(1073~1373 K)对具有纳米结构的球磨β型Ti-15Mo合金结构和摩擦学性能的影响。通过多种技术对试样进行表征,如X射线衍射分析(XRD)、电子扫描电镜(SEM)和球盘式往复摩擦试验机等;采用不同载荷(2、8和16 N)进行磨损试验。结... 详细信息

研究烧结温度(1073~1373 K)对具有纳米结构的球磨β型Ti-15Mo合金结构和摩擦学性能的影响。通过多种技术对试样进行表征,如X射线衍射分析(XRD)、电子扫描电镜(SEM)和球盘式往复摩擦试验机等;采用不同载荷(2、8和16 N)进行磨损试验。结果表明,随着烧结温度的升高,合金的平均孔径和晶粒尺寸不断减小,在1373 K时分别达到最低值:4 nm和29 nm,1373 K烧结样品的相对密度高达97.0%。此外,烧结温度越高,试样的相对密度越大、硬度越高、弹性模量越高;1373 K烧结试样由于其较低的闭孔率导致摩擦因数和磨损率也较低。

关键词： Ti-15Mo 磨损摩擦行为纳米摩擦烧结生物医用

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克格勃内幕一个苏联情报军官的自述

克格勃内幕一个苏联情报军官的自述

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1980年

作者：（苏）亚·米亚赫科夫（aleksei MyagKov）达洲译

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