Subjects -> CHEMISTRY (Total: 928 journals)
    - ANALYTICAL CHEMISTRY (59 journals)
    - CHEMISTRY (661 journals)
    - CRYSTALLOGRAPHY (23 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (45 journals)
    - ORGANIC CHEMISTRY (47 journals)
    - PHYSICAL CHEMISTRY (65 journals)

CHEMISTRY (661 journals)            First | 1 2 3 4 | Last

Showing 201 - 400 of 735 Journals sorted alphabetically
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 11)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 13)
Computational Chemistry     Open Access   (Followers: 3)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 12)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 6)
Corrosion Communications     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 17)
Croatica Chemica Acta     Open Access  
CrystEngComm     Hybrid Journal   (Followers: 10)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 8)
Current Opinion in Green and Sustainable Chemistry     Hybrid Journal  
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 8)
Current Protocols in Nucleic Acid Chemistry     Hybrid Journal  
Current Protocols in Protein Science     Hybrid Journal   (Followers: 1)
Current Research in Chemical Biology     Open Access  
Current Research in Chemistry     Open Access   (Followers: 7)
Current Research in Green and Sustainable Chemistry     Open Access  
Current Science     Open Access   (Followers: 115)
Current Topics in Medicinal Chemistry     Hybrid Journal   (Followers: 7)
Dalton Transactions     Hybrid Journal   (Followers: 23)
Detection     Open Access   (Followers: 3)
Diamond and Related Materials     Hybrid Journal   (Followers: 10)
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 4)
Ecological Chemistry and Engineering S     Open Access   (Followers: 2)
Educação Química en Punto de Vista     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
EDUSAINS     Open Access  
EJNMMI Radiopharmacy and Chemistry     Open Access  
Elements     Full-text available via subscription   (Followers: 3)
Energetic Materials Frontiers     Open Access  
EnergyChem     Hybrid Journal   (Followers: 1)
Environmental Chemistry     Hybrid Journal   (Followers: 9)
Environmental Chemistry and Ecotoxicology     Open Access  
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Hybrid Journal   (Followers: 7)
Environmental Science : Nano     Hybrid Journal   (Followers: 2)
Environmental Toxicology & Chemistry     Hybrid Journal   (Followers: 22)
Enzyme Research     Open Access   (Followers: 4)
Eurasian Chemico-Technological Journal     Open Access  
European Journal of Chemistry     Open Access   (Followers: 25)
European Journal of Histochemistry     Open Access   (Followers: 4)
European Journal of Medicinal Chemistry     Hybrid Journal   (Followers: 21)
European Journal of Medicinal Chemistry Reports     Open Access  
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
Faraday Discussions     Hybrid Journal   (Followers: 3)
Fine Chemical Technologies / Тонкие химические технологии     Open Access  
FirePhysChem     Open Access  
Fitoterapia     Hybrid Journal   (Followers: 4)
FlatChem : Chemistry of Flat Materials     Hybrid Journal  
Fluid Phase Equilibria     Hybrid Journal   (Followers: 4)
Folia Histochemica et Cytobiologica     Open Access  
Folia Microbiologica     Hybrid Journal   (Followers: 2)
Food Chemistry : Molecular Sciences     Open Access   (Followers: 1)
Food Digestion     Hybrid Journal   (Followers: 5)
Food Security     Open Access   (Followers: 11)
Food Structure     Hybrid Journal   (Followers: 3)
Forensic Chemistry     Hybrid Journal   (Followers: 9)
Foundations of Chemistry     Hybrid Journal   (Followers: 4)
Frontiers in Chemistry     Open Access   (Followers: 4)
Frontiers in Soil Science     Open Access  
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 5)
Fullerenes, Nanotubes and Carbon Nanostructures     Hybrid Journal   (Followers: 9)
Future Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Gases     Open Access   (Followers: 1)
Gels     Open Access  
Geochemical Transactions     Open Access   (Followers: 2)
Geofluids     Open Access   (Followers: 5)
Giant     Open Access  
Graphene     Open Access   (Followers: 7)
Graphene     Full-text available via subscription   (Followers: 3)
Graphene Technology     Hybrid Journal  
Green Analytical Chemistry     Open Access   (Followers: 3)
Green and Sustainable Chemistry     Open Access   (Followers: 4)
Green Chemistry Letters and Reviews     Open Access   (Followers: 6)
Green Synthesis and Catalysis     Open Access  
GSTF Journal of Chemical Sciences (JChem)     Open Access  
Helvetica Chimica Acta     Hybrid Journal   (Followers: 32)
Heritage Science     Open Access   (Followers: 5)
Heteroatom Chemistry     Open Access   (Followers: 3)
High Energy Chemistry     Hybrid Journal  
Indian Chemical Engineer     Hybrid Journal   (Followers: 4)
Indian Journal of Chemical Technology (IJCT)     Open Access   (Followers: 9)
Indian Journal of Chemistry - Section B (IJC-B)     Open Access   (Followers: 12)
Indian Journal of Natural Products and Resources (IJNPR)     Open Access   (Followers: 1)
Indonesian Journal of Chemical Science     Open Access  
Indonesian Journal of Chemistry     Open Access   (Followers: 1)
Indonesian Journal of Pure and Applied Chemistry     Partially Free  
Industrial & Engineering Chemistry     Full-text available via subscription   (Followers: 10)
InfoMat     Open Access  
Inorganic Chemistry     Hybrid Journal   (Followers: 31)
Inorganic Chemistry Communications     Hybrid Journal   (Followers: 13)
Inorganic Materials     Hybrid Journal   (Followers: 5)
Inorganica Chimica Acta     Hybrid Journal   (Followers: 6)
Instrumentation Science & Technology     Hybrid Journal   (Followers: 7)
International Archives of Science and Technology     Open Access  
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal of Adhesion and Adhesives     Hybrid Journal   (Followers: 18)
International Journal of Advanced Chemistry     Open Access   (Followers: 1)
International Journal of Agrochemistry     Full-text available via subscription  
International Journal of Analytical Mass Spectrometry and Chromatography     Open Access   (Followers: 8)
International Journal of Biological and Chemical Sciences     Open Access   (Followers: 4)
International Journal of Biological Chemistry     Open Access   (Followers: 2)
International Journal of Biological, Physical and Chemical Studies     Open Access  
International Journal of Chemical Kinetics     Hybrid Journal   (Followers: 7)
International Journal of Chemical Technology     Open Access   (Followers: 7)
International Journal of Chemistry     Open Access   (Followers: 10)
International Journal of Chemistry and Technology     Open Access   (Followers: 1)
International Journal of Chemoinformatics and Chemical Engineering     Full-text available via subscription   (Followers: 2)
International Journal of Corrosion     Open Access   (Followers: 10)
International Journal of Energetic Materials     Full-text available via subscription  
International Journal of Environmental Chemistry     Full-text available via subscription  
International Journal of Materials and Chemistry     Open Access   (Followers: 7)
International Journal of Medicinal Chemistry     Open Access   (Followers: 4)
International Journal of Minerals, Metallurgy, and Materials     Hybrid Journal   (Followers: 8)
International Journal of Molecular Sciences     Open Access   (Followers: 2)
International Journal of Nano Dimension     Open Access   (Followers: 2)
International Journal of Photoenergy     Open Access   (Followers: 3)
International Journal of Spray and Combustion Dynamics     Full-text available via subscription   (Followers: 15)
International Journal of Thermodynamics and Chemical Kinetics     Full-text available via subscription   (Followers: 2)
International Journal of Tryptophan Research     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 8)
International Research Journal of Pure and Applied Chemistry     Open Access  
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)     Open Access   (Followers: 1)
Iranian Polymer Journal     Hybrid Journal   (Followers: 3)
Iraqi Journal of Pharmacy     Open Access  
Israel Journal of Chemistry     Full-text available via subscription   (Followers: 4)
IUCrData     Open Access   (Followers: 1)
JACS Au     Open Access  
JBIC Journal of Biological Inorganic Chemistry     Hybrid Journal   (Followers: 2)
JCIS Open     Open Access   (Followers: 1)
JOT Journal für Oberflächentechnik     Hybrid Journal   (Followers: 1)
JOT-International Surface Technology     Hybrid Journal   (Followers: 1)
Journal of Adhesion     Hybrid Journal   (Followers: 7)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advances in Chemistry     Open Access   (Followers: 4)
Journal of Agricultural and Food Chemistry     Hybrid Journal   (Followers: 9)
Journal of Agricultural Chemistry and Environment     Open Access   (Followers: 3)
Journal of Al-Qadisiyah for Pure Science     Open Access  
Journal of Amino Acids     Open Access   (Followers: 1)
Journal of Analytical Methods in Chemistry     Open Access   (Followers: 1)
Journal of Analytical Sciences, Methods and Instrumentation     Open Access   (Followers: 4)
Journal of AOAC International     Hybrid Journal   (Followers: 4)
Journal of Applied Chemistry     Open Access   (Followers: 6)
Journal of Applied Solution Chemistry and Modeling     Hybrid Journal   (Followers: 1)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Biomaterials and Nanobiotechnology     Open Access   (Followers: 6)
Journal of Boron     Open Access  
Journal of Carbohydrate Chemistry     Hybrid Journal   (Followers: 4)
Journal of Catalysis     Hybrid Journal   (Followers: 11)
Journal of Catalyst & Catalysis     Full-text available via subscription   (Followers: 2)
Journal of Chemical & Engineering Data     Hybrid Journal   (Followers: 10)
Journal of Chemical Education     Hybrid Journal   (Followers: 20)
Journal of Chemical Information and Modeling     Hybrid Journal   (Followers: 18)
Journal of Chemical Research     Open Access   (Followers: 6)
Journal of Chemical Reviews     Open Access  
Journal of Chemical Sciences     Partially Free   (Followers: 22)
Journal of Chemical Theory and Computation     Hybrid Journal   (Followers: 21)
Journal of Chemical Thermodynamics     Hybrid Journal   (Followers: 7)
Journal of Cheminformatics     Open Access   (Followers: 7)
Journal of Chemistry     Open Access   (Followers: 6)
Journal of Chemistry, Environmental Sciences and its Applications     Open Access   (Followers: 2)
Journal of Chemometrics     Hybrid Journal   (Followers: 9)
Journal of Chromatography A     Hybrid Journal   (Followers: 63)
Journal of Chromatography Open     Open Access   (Followers: 1)
Journal of Coating Science and Technology     Hybrid Journal  
Journal of Colloid and Interface Science     Hybrid Journal   (Followers: 17)
Journal of Computational Chemistry     Hybrid Journal   (Followers: 21)
Journal of Coordination Chemistry     Hybrid Journal   (Followers: 5)
Journal of Dispersion Science and Technology     Hybrid Journal  
Journal of Education and Science     Open Access   (Followers: 2)
Journal of Encapsulation and Adsorption Sciences     Open Access   (Followers: 1)
Journal of Energy Chemistry     Full-text available via subscription   (Followers: 3)
Journal of Flow Chemistry     Full-text available via subscription   (Followers: 2)
Journal of Fluorescence     Hybrid Journal   (Followers: 3)
Journal of Fluorine Chemistry     Hybrid Journal   (Followers: 7)
Journal of Fuel Chemistry and Technology     Full-text available via subscription   (Followers: 1)
Journal of Great Lakes Research     Hybrid Journal   (Followers: 5)
Journal of Heterocyclic Chemistry     Hybrid Journal   (Followers: 10)
Journal of Immunoassay and Immunochemistry     Hybrid Journal   (Followers: 9)
Journal of Inclusion Phenomena and Macrocyclic Chemistry     Hybrid Journal   (Followers: 1)
Journal of Inorganic Biochemistry     Hybrid Journal   (Followers: 4)
Journal of Ionic Liquids     Open Access  
Journal of Labelled Compounds and Radiopharmaceuticals     Hybrid Journal   (Followers: 4)
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry     Hybrid Journal   (Followers: 1)
Journal of Mass Spectrometry     Hybrid Journal   (Followers: 41)
Journal of Materials Chemistry A : Materials for Energy and Sustainability     Hybrid Journal   (Followers: 40)
Journal of Materials Chemistry B : Materials for Biology and Medicine     Hybrid Journal   (Followers: 11)
Journal of Materials Chemistry C : Materials for Optical, Magnetic and Electronic Devices     Hybrid Journal   (Followers: 17)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 7)
Journal of Materials Research     Full-text available via subscription   (Followers: 13)
Journal of Materials Science and Chemical Engineering     Open Access   (Followers: 1)
Journal of Mathematical Chemistry     Hybrid Journal   (Followers: 5)
Journal of Medicinal Chemistry     Hybrid Journal   (Followers: 134)
Journal of Membrane Science     Hybrid Journal   (Followers: 22)
Journal of Metastable and Nanocrystalline Materials     Full-text available via subscription   (Followers: 1)
Journal of Modern Chemistry & Chemical Technology     Open Access   (Followers: 2)
Journal of Molecular Graphics and Modelling     Hybrid Journal   (Followers: 1)

  First | 1 2 3 4 | Last

Similar Journals
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High Energy Chemistry
Journal Prestige (SJR): 0.278
Citation Impact (citeScore): 1
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1608-3148 - ISSN (Online) 0018-1439
Published by Springer-Verlag Homepage  [2469 journals]
  • Comparative Dehalogenation of 1-Chloro-2-Hydroxyethane and
           1-Chloro-2-Methoxyethane by γ-Irradiation

    • Free pre-print version: Loading...

      PubDate: 2022-04-01
       
  • Effect of Gliding Electric Discharge on the Oxidizing Capacity of a Water
           Aerosol Jet

    • Free pre-print version: Loading...

      Abstract: The oxidizing capacity of a water aerosol jet passed through the region of pulsed gliding electric discharge has been investigated. It has been found that the action of the discharge on water droplets results in the formation of hydrogen peroxide and a complex that decomposes into peroxynitrite and peroxynitrous acid within a few days. Peroxynitrous acid plays the main role in oxidative processes. The 100-eV yield of oxidation is 2.3 ± 0.3. The jet has strong sterilizing properties and can be used for disinfection of industrial premises and transport.
      PubDate: 2022-04-01
       
  • Laser Technology of Directional Microstructuring of Biodegradable
           Nonwovens

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      Abstract: The influence of mid-IR (1.94 μm) laser radiation on the morphology of polylactide and polycaprolactone nonwoven materials obtained by electrospinning has been revealed. It has been shown that laser irradiation makes it possible to achieve local structuring of the nonwovens at the micrometer level, in particular, to fuse individual fibers, straighten them between fusion points, and prepare monolithic films from the materials or, conversely, create breaks in them. The influence of laser irradiation parameters (power, laser spot speed, scan line density) and additional wetting of the samples on the structure of the nonwovens has been determined.
      PubDate: 2022-04-01
       
  • Influence of the Luminous Gas Phase into Butane Plasma Polymerization in a
           Closed Reactor System

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      Abstract: This study investigated the plasma polymerization process of butane in a closed radio frequency plasma reactor system. Optical emission spectra of the luminous gas phase specified the main plasma species in the plasma system are radical species of CH and H (Balmer series). In the early stage of the butane plasma polymerization process, dissociation glow (cathode glow) was the primary glow with much higher deposition rate observed due to the availability of CH radicals in the system. In the late stage of the plasma process, in contrast, negative glow dominated and plasma deposition rate significantly decreased and eventually stopped due to exhaustion of the film forming CH radicals as confirmed by OES spectra of the luminous plasma phase. The results indicate that dissociation glow in the discharge creates hydrocarbon species for plasma polymeric film deposition.
      PubDate: 2022-04-01
       
  • Influence of IR Laser Radiation on the Surface of Polytetrafluoroethylene
           Containing Small Amounts of Perfluoropropyl Vinyl Ether Units

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      Abstract: The surface of chemically modified polytetrafluoroethylene, obtained by introducing 1 mol % perfluoropropyl vinyl ether in the polytetrafluoroethylene macromolecule chain, has been studied using Raman spectroscopy. Three conventional zones with varying degrees of modification are distinguishable on the surface, and the spectrum of the ablation crater is fundamentally different from that of the pristine polymer. The crater spectrum, showing a general rise in the baseline, exhibits new bands due to both double carbon bonds and absorption bands of CF3 groups. A key factor in the laser ablation process is the influence of defects in the regular structure of polymer macromolecules, both intrinsically present in the polymer and induced by laser irradiation.
      PubDate: 2022-04-01
       
  • Environment Friendly g-C3N4-Based Catalysts and Their Recent Strategy in
           Organic Transformations

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      Abstract: Organic molecules synthesized in an environmentally friendly manner have excellent therapeutic potential. The entire preparation technique was examined in the existence of a light source, implying that light has been replaced by heating and the usage of dangerous chemicals has decreased, resulting in less pollution of the environment. The advantages of these nanocarbon catalysts include high efficiency, environmentally friendly synthesis, eco-friendly, inexpensive, and non-corrodible. In organic transformations, solid metal base/metal-free catalysts produce better results. Here, the metal-free semiconductor g-C3N4 was used to demonstrate the catalytic behavior of organic conversions. g-C3N4 is a two-dimensional material and a p‑type semiconductor to enhance the photocatalytic activity. The excellent properties of g-C3N4 sheet lead to the support of metals to form metal-organic frameworks. Most of the reactions gained positive response under visible light irradiation. This review will inspire readers in widen the applications of g-C3N4 based catalyst in various organic transformation reactions.
      PubDate: 2022-04-01
       
  • Surface Phenomena in the Ionization Chamber of the Mass Spectrometer Ion
           Source

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      Abstract: The resonance interaction of ionizing electrons with 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules was studied by negative-ion mass spectrometry. The installation of an energy filter in the ion source confirmed the possibility of a dissociation process on the surface of the ionization chamber of the ion source. The formation of negative fragment ions through a dissociation channel based on the Schottky effect was demonstrated.
      PubDate: 2022-04-01
       
  • Study of Photoelectrophysical Characteristics of IR Photodetector Based on
           HgTe Colloidal Quantum Dots

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      Abstract: The integral current responsivity and detectivity of laboratory samples of IR photodetectors based on HgTe colloidal quantum dots were measured as functions of the thickness of the photosensitive layer. The layers were obtained by sequential deposition of quantum dot monolayers by dip-coating replacing of the original long-chain molecules of ligand shell of quantum dots with 1,2-ethanedithiol molecules.
      PubDate: 2022-04-01
       
  • Bio-Assisted Preparation of Nano Zinc Oxide and Its Behavior Towards
           Textile Azo Pollutants

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      Abstract: Recent reports on nanoparticles rise significantly as they possess numerous applications in medical, material science, optics, and bioscience etc. Nanoparticles show unique properties as they are an inter-linker between bulk materials and atomic structures. On behalf of large surface area of nanoparticles, they are utilized to a greater extent that leads to contribute in making small bulk of the nanoparticles. Varieties of procedures are already reported but they have too much drawbacks like release of toxic by-products that are hazardous to the environment. To address all these problems, greener method such as plant extract was introduced. In India, Glycyrrhiza glabra, a small traditional perennial herb was used to cure sore throat, cough, ulcers and hepatitis. Hence, the aforementioned plant extract was used to synthesize ZnO nanoparticles. The green synthesized ZnO nanoparticles were analysed to study their morphology and other salient characters by the utilization of UV-Vis spectroscopy, FT-IR, SEM and TEM analysis. In this present study, utilization of this green synthesized ZnO NPs in the photo degradation of azo dyes (Congo red and amaranth dyes) and kinetic expressions were reported. These findings revealed good photocatalytic activity against the azo dyes (Congo red and Amaranth dyes) and an excellent photocatalyst for Congo red dye degradation. This synthetic approach is environmental friendly and can provide new techniques in the management of pollutants.
      PubDate: 2022-04-01
       
  • A Chemosensor with Switched-on Luminescence for the Detection of Ammonia
           Vapor

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      Abstract: The luminescent chemosensor properties of Eu(III) dibenzoylmethanate with caproic acid have been revealed. It has been shown that the interaction of the Eu(III) chelate with ammonia vapor leads to an increase in the luminescence intensity of the complex. The experimentally determined limit of detection for ammonia was 3 ppm. The reversibility of the optical response has been established. The resulting chemosensor composition with the luminescence switching effect under the action of the analyte is promising for environmental monitoring.
      PubDate: 2022-02-01
       
  • Inorganic Ruthenium Catalyst for Photoinduced Oxidation of Water in
           Artificial Photosynthesis

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      Abstract: The reaction of photocatalytic oxidation of water with potassium persulfate in the presence of the photosensitizer bpy3RuCl2·6H2O and the ruthenium nitride complex Li3[Ru2(µ-N)Cl8·2H2O] has been studied. It has been found by kinetic and electrospray-ionization mass spectrometry methods that the catalyst for the process is the tetraruthenium complex \({\text{R}}{{{\text{u}}}_{{\text{4}}}}{{{\text{N}}}_{{\text{2}}}}{\text{O}}_{5}^{ + }\) with a molecular weight of 512.28 amu. The efficiency of the catalytic system (a turnover number of TON = 360, a О2 quantum yield of Ф = 0.51) is higher than that of its oxygen analogue Li4[Ru2OCl10∙2H2O] (TON = 240 and Ф = 0.2).
      PubDate: 2022-02-01
       
  • Influence of Gamma Irradiation on the Properties of Single-Walled Carbon
           Nanotubes Obtained by CVD Synthesis

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      Abstract: Transparent films of single-walled carbon nanotubes (SWCNTs) were prepared by modified CVD synthesis, and their structure was investigated at the atomic level. The composition of organic impurities that formed a moss-like coating around the nanotubes was determined by gas chromatography–mass spectrometry (GC–MS) analysis. It was found that the films had clearly pronounced Van Hove singularities, which indicated a high concentration of single-walled nanotubes in them. Under gamma-irradiation, the walls of the nanotubes were covalently modified by impurities that formed a moss-like coating around them.
      PubDate: 2022-02-01
       
  • Photophysical and Structural Characteristics of Enantiomers of Metallocene
           Dicarboranyls

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      PubDate: 2022-02-01
       
  • Study of the Recoil Impulse of Gaseous Products of IR Laser Ablation of
           Polytetrafluoroethylene

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      Abstract: The formation of laser thrust by the pressure of gases released from the crater of laser ablation of polytetrafluoroethylene in vacuum has been studied, and a model for calculating the mechanical recoil impulse of ablation products has been implemented on the basis of a gravimetric curve obtained using an electronic balance that allows direct recording during intermittent (at 5-s intervals) or continuous irradiation for 5, 10, 15, 25, and 30 s with an infrared CO2 laser. Regardless of the laser operation mode, the observed polymer weight loss by ablation is linearly related to the laser irradiation time, having a rate of 80 μN/s. The maximum mechanical recoil impulse, which appears on the gravimetric ablation curves 4.5 ± 0.3 s after the laser is switched on, is 145 ± 7 or 90 ± 20 μN s in the continuous or the intermittent irradiation mode, respectively. In this case, an increase in the time of laser irradiation of the polymer in both modes leads to an insignificant change in the specific mechanical recoil impulse within 2.76 ± 0.06 μN/J. The results of the study show the possibility of using a polytetrafluoroethylene target for laser thrust, and the method of calculating the force momentum from the gravimetric curve of ablation of polytetrafluoroethylene can be used to investigate the mechanism of laser ablation of other polymer targets.
      PubDate: 2022-02-01
       
  • Development of Multichromophore Supramolecular Devices and Machines

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      Abstract: Among various directions in the science of photoactive organic compounds, the design, creation, and study of multichromophore supramolecular devices and machines attract special attention, since this way can open up new approaches to the construction of complex hierarchical “smart” materials.
      PubDate: 2022-02-01
       
  • Organic Photochromics

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      Abstract: The results of targeted fundamental studies of the photochromism of organic compounds, systems and materials on their basis, performed at the Photochemistry Center of the Russian Academy of Sciences, have been analyzed. The scientific basis for the creation of photochromic materials for light-modulating devices and photosensitive recording media for three-dimensional (3D) optical memory with acceptable functional properties has been developed. Practically significant advances have been achieved in the development of photochromic nanoparticles, photochromic optical sensors, and light-adaptive coatings with negative photochromism. The prospects of using photochromic compounds in biomedical technologies are noted.
      PubDate: 2022-02-01
       
  • Evaluation of Absorbed Dose in Shielding Glass Exposed to Ionizing
           Radiation Fluxes

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      Abstract: For the first time in a wide range of energies of protons (from 0.1 to 400 MeV) and electrons (from 0.04 to 7 MeV), using the Spenvis database and software of the European Space Agency, proton and electron fluxes have been calculated in accordance with the operating conditions of the SamSat–ION nanosatellite in a sun-synchronous orbit (SSO). In accordance with the spectral energy characteristics of these fluxes, the ionization and radiation losses have been calculated for radiation shielding glass K-208 and SiO2 and, in addition, the annual absorbed dose has been determined using empirical formulas. The results of computation of the integral fluxes in the radiation shielding glass K-208 and SiO2 of various thicknesses irradiated with protons and electrons in a circular SSO are presented, and the proportion of the particles passed through in the single-layer stack approximation is shown.
      PubDate: 2022-02-01
       
  • Synthesis of Decorated Carbon Structures with Encapsulated Components by
           Low-Voltage Electric Discharge Treatment

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      Abstract: Polycondensation of complexes of chloromethanes with triphenylphosphine by the action of low-voltage electric discharges in the liquid phase gives nanosized solid products. The elemental composition involving the generation of element distribution maps (scanning electron microscopy–energy dispersive X‑ray spectroscopy mapping) and the component composition (by direct evolved gas analysis–mass spectrometry) of the solid products have been studied. The elemental and component compositions of the result-ing structures vary widely depending on the chlorine content in the substrate and on the amount of triphenylphosphine taken. Thermal desorption analysis revealed abnormal behavior of HCl and benzene present in the solid products. In thermal desorption spectra, these components appear at an uncharacteristically high temperature. The observed anomaly in the behavior of HCl is due to HCl binding into a complex of the solid anion \({\text{HCl}}_{2}^{ - }\) with triphenyl(chloromethyl)phosphonium chloride, which requires a relatively high temperature (up to 800 K) to decompose. The abnormal behavior of benzene is associated with its encapsulated state in nanostructures. The appearance of benzene begins at 650 K and continues up to temperatures above 1300 K.
      PubDate: 2022-02-01
       
  • Modeling of the Reaction of Nitrobenzene with Olefins: Influence of
           Electron-Donating and Electron-Withdrawing Substituents

    • Free pre-print version: Loading...

      Abstract: The gas-phase reaction of nitrobenzene in the T1 state with ethene has been simulated using the uB3LYP/6-311g++(d, p) method. The reaction mechanism has been studied, and the activation energy for the interaction of o-, m-, and p-PhNO2–R, where R = CH3, CCl3, CF3, or Cl, has been determined. It has been found that the interaction of olefins with nitromethane in the triplet state (T1) involves three reactions. An increase in the activation energy associated with the steric factor in the reactions of ethene addition to RNO2Ph, where R is in the ortho-positions, has been revealed. It has been also found that there is a decrease, associated with the steric factor, in the activation energy in the degradation reactions of the product of the first step of the addition of nitro compounds to olefins, a biradical bearing R in the ortho-position.
      PubDate: 2022-02-01
       
  • Fluorescent Chemosensor Materials

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      Abstract: This review considers the main stages in the development of fluorescent chemosensor materials performed at the Photochemistry Center of the Russian Academy of Sciences over the past 15 years. Systems based on original acridine dyes synthesized at the Photochemistry Center and well-known fluorescent dyes and fluorophores of the family of boron difluoride diketonates are described. Polymer films and microparticles and silica micro- and nanoparticles have been studied as solid-state matrices for chemosensors.
      PubDate: 2022-02-01
       
 
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