Subjects -> CHEMISTRY (Total: 928 journals)
    - ANALYTICAL CHEMISTRY (59 journals)
    - CHEMISTRY (661 journals)
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CHEMISTRY (661 journals)            First | 1 2 3 4     

Showing 601 - 735 of 735 Journals sorted alphabetically
Russian Journal of Bioorganic Chemistry     Hybrid Journal   (Followers: 1)
Russian Journal of Coordination Chemistry     Hybrid Journal   (Followers: 1)
Russian Journal of General Chemistry     Hybrid Journal   (Followers: 1)
Russian Journal of Inorganic Chemistry     Hybrid Journal  
Sainstek : Jurnal Sains dan Teknologi     Open Access  
Science China Chemistry     Hybrid Journal   (Followers: 2)
Science Talks     Full-text available via subscription   (Followers: 4)
Sciences & Technologie A : sciences exactes     Open Access  
Scientific Journal of Frontier Chemical Development     Open Access   (Followers: 2)
Scientific Reports     Open Access   (Followers: 82)
Sensors and Actuators B: Chemical     Hybrid Journal   (Followers: 17)
Sensors and Actuators Reports     Open Access   (Followers: 6)
Separation & Purification Reviews     Hybrid Journal   (Followers: 3)
Separation Science and Technology     Hybrid Journal   (Followers: 7)
Separations     Open Access   (Followers: 5)
Silicon Chemistry     Hybrid Journal   (Followers: 1)
Small Methods     Hybrid Journal   (Followers: 1)
Small Science     Open Access   (Followers: 5)
Small Structures     Hybrid Journal   (Followers: 2)
Smart Materials Research     Open Access   (Followers: 7)
SmartMat     Open Access   (Followers: 1)
Soft     Open Access  
Soft Nanoscience Letters     Open Access   (Followers: 1)
Solar RRL     Hybrid Journal  
Solid State Communications     Hybrid Journal   (Followers: 7)
Solid State Nuclear Magnetic Resonance     Hybrid Journal   (Followers: 3)
Solid State Sciences     Hybrid Journal   (Followers: 7)
Solvent Extraction and Ion Exchange     Hybrid Journal   (Followers: 7)
SPE Polymers     Open Access   (Followers: 1)
Spectral Analysis Review     Open Access  
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy     Hybrid Journal   (Followers: 14)
Spectrochimica Acta Part B: Atomic Spectroscopy     Hybrid Journal   (Followers: 16)
Spectroscopy and Spectral Analysis     Full-text available via subscription   (Followers: 1)
Starch / Staerke     Hybrid Journal   (Followers: 2)
Steel Research International     Hybrid Journal   (Followers: 23)
Structural Chemistry     Hybrid Journal   (Followers: 1)
Substantia     Open Access  
Supramolecular Chemistry     Hybrid Journal   (Followers: 5)
Supramolecular Materials     Full-text available via subscription   (Followers: 8)
Surface and Coatings Technology     Hybrid Journal   (Followers: 32)
Surface Science     Hybrid Journal   (Followers: 21)
Surface Science Reports     Full-text available via subscription   (Followers: 13)
Surfaces     Open Access   (Followers: 2)
Surfaces and Interfaces     Hybrid Journal   (Followers: 1)
Sustainable Chemical Processes     Open Access   (Followers: 4)
Sustainable Chemistry and Pharmacy     Full-text available via subscription   (Followers: 1)
Synfacts     Hybrid Journal   (Followers: 5)
Synlett     Hybrid Journal   (Followers: 43)
Synthesis     Hybrid Journal   (Followers: 51)
Talanta     Hybrid Journal   (Followers: 9)
Talanta Open     Full-text available via subscription   (Followers: 4)
Tecnología Química     Open Access  
Telematics and Informatics Reports     Full-text available via subscription   (Followers: 3)
Tenside Surfactants Detergents     Full-text available via subscription   (Followers: 1)
Tetrahedron     Hybrid Journal   (Followers: 85)
Tetrahedron Chem     Full-text available via subscription   (Followers: 2)
Tetrahedron Letters     Hybrid Journal   (Followers: 89)
The Alkaloids: Chemistry and Biology     Full-text available via subscription   (Followers: 1)
The All Results Journals : Chem     Open Access   (Followers: 1)
The Canadian Journal of Chemical Engineering     Hybrid Journal   (Followers: 5)
The Enzymes     Full-text available via subscription   (Followers: 1)
The Protein Journal     Hybrid Journal   (Followers: 2)
Theoretical and Experimental Chemistry     Hybrid Journal  
Theoretical Chemistry Accounts     Hybrid Journal   (Followers: 6)
Thermochimica Acta     Hybrid Journal   (Followers: 18)
Tip Revista Especializada en Ciencias Quimico-Biologicas     Open Access  
Topics in Current Chemistry     Hybrid Journal  
Toxicology International     Full-text available via subscription   (Followers: 4)
Toxicology Research     Partially Free   (Followers: 8)
Transition Metal Chemistry     Hybrid Journal   (Followers: 6)
Trends in Chemistry     Hybrid Journal   (Followers: 2)
Turkish Computational and Theoretical Chemistry     Open Access  
Ultrasonics Sonochemistry     Hybrid Journal   (Followers: 2)
Universal Journal of Chemistry     Open Access   (Followers: 1)
Vietnam Journal of Chemistry     Hybrid Journal  
Western Undergraduate Research Journal : Health and Natural Sciences     Open Access  
Wiley Interdisciplinary Reviews : Computational Molecular Science     Hybrid Journal   (Followers: 5)
World Journal of Chemical Education     Open Access   (Followers: 2)
X-Ray Spectrometry     Hybrid Journal   (Followers: 4)

  First | 1 2 3 4     

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Russian Journal of General Chemistry
Journal Prestige (SJR): 0.225
Citation Impact (citeScore): 1
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1608-3350 - ISSN (Online) 1070-3632
Published by Springer-Verlag Homepage  [2468 journals]
  • Erratum to: Photo- and Ionochromic Diarylethenes with Receptor Fragments
           in the Thiazole Bridge

    • Free pre-print version: Loading...

      Abstract: Erratum
      PubDate: 2023-10-01
       
  • Erratum to: Synthesis, Spectral-Luminescent, and Ionochromic Properties of
           a Rhodamine B Derivative Containing a Terminal
           (4-Hydroxybenzyl)triphenylphosphonium Chloride Substituent

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      Abstract: Erratum
      PubDate: 2023-10-01
       
  • Erratum to: Rhodamine 6G-Based Molecular Ion-Active Switches of Optical
           and Fluorescent Properties

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      Abstract: Erratum
      PubDate: 2023-10-01
       
  • Synthesis of (2E)-5-Arylpent-2-ene-4-ynoates

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      Abstract: An effective method was developed for the synthesis of (2E)-5-arylpent-2-ene-4-ynoates based on the olefination-dehydrobromination of (2Z)-2-bromo-3-arylprop-2-enals obtained by bromination of commercially available cinnamaldehyde and its derivatives.
      PubDate: 2023-10-01
       
  • Reaction of N,N′-Diphenyldithiomalondiamide with Aromatic Aldehydes
           and Cyanoacetamide

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      Abstract: The reaction of dithiomalondianilide (N,N′-diphenyldithiomalondiamide) with aromatic aldehydes and cyanoacetamide in the presence of morpholine yielded previously undescribed 6-amino-4-aryl-7-phenyl-3-(phenylimino)-4,7-dihydro-3H-[1,2]dithiolo[3,4-b]pyridine-5-carboxamides.
      PubDate: 2023-10-01
       
  • Spectral Change of Curcumin in DMSO–NaOH Solution after Exposure to
           Air

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      Abstract: Curcumin (CurH3) forms a blue derivative (CurH2–) when it combines with superoxide radicals. The blue coloring is caused by the proton loss of curcumin to the superoxide radicals. In DMSO, in the presence of excess NaOH and dissolved oxygen, superoxide radicals are produced by consuming the hydroxyl ion which causes the deprotonation of curcumin (Cur3–) and gives the corresponding orange color. The production of superoxide radicals increased as it was more exposed to air (maybe oxygen). As a result, the pH drops, and the orange derivative is protonated by one H+ ion, producing the corresponding blue color derivative (CurH2–). The conversion of the orange derivate to the blue derivative may suggest the presence of oxygen in the surrounding atmosphere, allowing the feasibility of a novel oxygen sensor. The physicochemical characteristics and stability of this blue-colored curcumin derivative are investigated. The distinct color shifts of curcumin upon the addition of different volumes of NaOH were also investigated. The UV-Vis and FTIR analyses were used to study the stability of the blue curcumin derivative.
      PubDate: 2023-10-01
       
  • Synthesis, Antitubercular Evaluation, Molecular Docking Study, and
           Teratogenicity Studies of Novel Triazolo Quinazoline Hybrids

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      Abstract: A novel series of triazole-quinazoline hybrid molecules was synthesized and characterized by spectral analyses. The H37 RV strain was used to test the newly synthesised compounds for antitubercular efficacy against Mycobacterium tuberculosis. Some of the synthesized compounds were effective compared with standard pyrazinamide at a concentration of 3.12 μg/mL. Additionally, molecular docking investigations were conducted on all synthesized compounds against the M. tuberculosis InhA protein, which is attenuated by the PT70 X-ray crystal structure, PDB ID: 2X22. Two compounds were revealed the best against 2X22, with Autodock scores of –9.13 and –8.59, respectively. To further investigate the teratogenicity of the synthesized compounds, zebrafish larvae were employed. At a concentration of 100 μM, some compounds showed no signs of abnormality.
      PubDate: 2023-10-01
       
  • Highly Efficient One Pot Electrocatalytic Method for Transforming Alcohols
           to Nitriles

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      Abstract: A one pot electrocatalytic method was developed for the oxidative transformation of alcohols into nitriles in a two-phase aqueous-organic medium: methylene chloride–aqueous sodium bicarbonate solution. Under the proposed conditions, the catalytic system 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxyl–pyridine base with the participation of ammonium iodide makes it possible to convert a wide range of alcohols into nitriles with good to excellent yields (81–99%) without the use of catalysts based on toxic metals, hazardous reagents and/or oxidizing agents. In the synthesis, ammonium iodide is simultaneously a source of nitrogen and iodine, and also functions as a component of the background electrolyte.
      PubDate: 2023-10-01
       
  • Effect of Glass Crystallization Conditions on Conductivity of
           Li1.5+хAl0.5Ge1.5SixP3–xO12 Glass-Ceramics

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      Abstract: Glass-ceramic samples of the Li1.5+xAl0.5Ge1.5SixP3–xO12 system (x = 0–0.1) were obtained by by glass crystallization. The temperatures of glass transition and of crystallization onset and peak were determined using differential scanning calorimetry. The phase composition of glass-ceramics was determined by X-ray phase analysis. Electrical conductivity was studied using electrochemical impedance. Based on the data obtained, the homogeneity region of solid solutions was established and the optimal conditions for obtaining SiO2-doped glass-ceramics were determined. The composition with x = 0.02, obtained by crystallized at 750°C at a heating rate of 3 deg/min for 2 h, had the highest lithium-ion conductivity at room temperature (4.55×10–4 S/cm).
      PubDate: 2023-10-01
       
  • Synthesis of Vismodegib Derivatives as Potential Smo Agonist: A Case of
           Undergraduate Experimental Teaching

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      Abstract: The activation of Hh pathway demonstrates therapeutic potential for many diseases. Smo is the main target for the development of Hh pathway modulators. However, compared with Smo antagonist, the development of Smo agonists is lagging behind. Based on our previous work, a series of vismodegib derivatives were designed and synthesized, and their potential to activate the Hh pathway were evaluated via determining the up-regulation of known pathway target genes Gli1, whcih revealed that many target compounds could activate the Hh pathway. XH-16 and XH-17, with the strongest agonistic effect, could upregulate the expression of Gli1 by more than 50% at a concentration of 10 μM. In vitro cytotoxicity against A549 and the MDA-MB-231 cells was evaluated and the results revealed that XH-16 and XH-17 did not exhibit cytotoxicity at a concentration of 50 μM. Molecular docking results confirmed that XH-16 and XH-17 could bind to Smo indicating that their agonistic effect on the Hh pathway may be due to the activation of Smo. XH-16 and XH-17 with novel molecular scaffold could be used as a lead compound for the development of Smo agonists. Moreover, the research process was introduced in a medicinal chemistry experimental course to assist undergraduates in understanding the core of medicinal chemistry and building capabilities for independently carrying out a medicinal chemistry project. And the teaching practice experiences were summed up to provide suggestions for the development of exploratory experimental course.
      PubDate: 2023-10-01
       
  • Phenalenyl-Substituted Stilbenes as the Basis for Spin Switches:
           Quantum-Chemical Modeling

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      Abstract: Isomers of stilbenes containing phenalenyl substituents in the para- and meta-positions of phenyl rings have been studied by means of the density functional theory method. Exchange coupling in the structures with the trans-form of stilbenes has been absent. In the cis-isomer of a meta-substituted compound, the state with a closed electron shell has been stabilized due to two-electron multicenter interactions, as confirmed by the CASSCF calculations. The predicted transition between the triplet and singlet states due to the trans-cis isomerization opens the prospects for using the discovered effect in the development of organic spin switches.
      PubDate: 2023-10-01
       
  • Addition of Alcohols to 4-Methylene-1,3-dioxolanes

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      Abstract: The addition of alcohols to 2-methylene-1,4-dioxaspiro[4.5]decane under the conditions of CF3CO2H catalysis occurs with the selective formation of the corresponding alkoxy derivatives. The conditions that ensure preparative isolation of target compounds in 63–94% yields have been determined, and relative activity of alcohols in the addition reaction at the exocyclic double bond of substrates has been determined.
      PubDate: 2023-10-01
       
  • Synthesis and Evaluation of Herbicidal Activity of
           [4-(2-Nitrobenzyl)piperazin-1-yl](phenyl)methanone Derivatives

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      Abstract: A series of novel [4-(2-nitrobenzyl)piperazin-1-yl](phenyl)methanone derivatives containing piperazine structures were designed and synthesized. (3,7-Dichloroquinolin-8-yl)[4-(2-nitrobenzyl)piperazin-1-yl]methanone was selected to confirm the spatial structure through X-ray diffraction. Herbicidal activity of the target compounds was evaluated against the pre-emergence of Echinochloa crusgalli L., Lolium perenne L., Amaranthus retroflexus L. and Lactuca sativa var. ramosa Hort. Herbicidal activity of compounds with different substituent on the phenyl followed an order of magnitude that was given as: donor-drawing group > neutral group > electron-drawing group on Lactuca sativa var. ramosa Hort. (2,3-Dimethylphenyl)[4-(2-nitrobenzyl)piperazin-1-yl]methanone showed stronger herbicidal activity against the pre-emergence of Echinochloa crusgalli L. and Lolium perenne, while (2-chlorophenyl)-[4-(2-nitrobenzyl)piperazin-1-yl]methanone showed stronger herbicidal activity against Amaranthus retroflexus L. and Lactuca sativa var. ramosa Hort.
      PubDate: 2023-10-01
       
  • New Europium Methoxycinnamates: Synthesis and Thermal and Luminescence
           Properties

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      Abstract: A method was proposed for the synthesis of Eu(III) compounds with para-methoxycinnamic acid anions and neutral ligands, starting from the sodium salt of para-methoxycinnamic acid. Using the methods of chemical elemental and thermal analyses and IR spectroscopy, the composition of the complexes and the coordination mode of carboxylate anions were determined. It was found that europium(III) methoxycinnamate with hexamethylphosphotriamide has the highest luminescence intensity. Luminescent polymer materials with synthesized europium(III) methoxycinnamates were obtained.
      PubDate: 2023-10-01
       
  • Reaction Features of Nitrosulfodienes of Thiolene-1,1-dioxide Series with
           Semicarbazide

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      Abstract: The influence of the electronic and spatial structure of the diene system of 2-benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene-1,1-dioxides on the result of the reaction with semicarbazide in different media (in ethanol and DMSO) was studied. The structure of the obtained compounds was established by IR, 1Н, 13С{1Н}, 1Н–13С HMQC, 1Н–13С HMBC, 1Н–1Н NOESY spectroscopy methods.
      PubDate: 2023-10-01
       
  • Alkyl, Aryl, and Hetaryl Acetylenes: Highly Reactive Multifunctional
           Compounds (A Review)

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      Abstract: The authors’ data (2000–2022) on synthesis methods, reactivity, and applied aspects of aryl- and hetarylacetylenes were summarized. The specificity of alkynylarenes (hetarenes) associated with the activation of the triple bond by acceptor groups was pointed out. Particular attention was paid to fundamentally important new reactions of heterocyclization and complete soft cleavage of the triple bond. The prospects for the use of alkynylarenes and -hetarenes and products of their modification were considered. The results of screening of the synthesized compounds were presented.
      PubDate: 2023-10-01
       
  • Impact of Annealing on Structural, Optical, and Electrical Characteristics
           of Spin Coated Cu2ZnSnS4 Thin Films

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      Abstract: Cu2ZnSnS4 (CZTS) thin films were deposited on glass slides using the spin coating technique. The fabricated samples were then subjected to annealing at 250, 300, and 350°C temperatures, and their structural, optical, and electrical characteristics were then examined. X-ray diffraction and Raman analysis demonstrated the development of kesterite, and single-phase CZTS thin films at all the annealing temperatures, respectively. Optical characteristics of annealed thin films were studied. Depending upon the annealing temperature, the band gap value of the annealed films varies from 1.5 to 1.9 eV. Hall measurements revealed the p-type semiconducting behavior of the annealed thin films. Also, the hall mobility and conductivity of the thin films increase with annealing temperature. The current–voltage (I–V) curves for annealed samples are almost linear whose slope (I/V) increases with annealing temperature. Thus, the resistivity of the thin films decreases with annealing temperature, which verifies the semiconducting behavior of the CZTS thin films.
      PubDate: 2023-10-01
       
  • Nucleation and Growth Kinetics of Potassium Dihydrogen Phosphate Crystal
           in Stirred Tank Crystallizer

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      Abstract: The use of stirred tank crystallizers (STCs) for the separation and purification of crystals has recently garnered increased attention. Previous research on the crystallization of potassium dihydrogen phosphate (KDP) has primarily concentrated on process efficiency and thermodynamics, with less emphasis on kinetics. In this study, we employ STC technology to delve into the crystallization process of KDP. We explored the mechanisms underlying crystal formation by continuously withdrawing a suspension containing target crystals of a specific size distribution. Our investigation of the KDP crystallization process focuses on key parameters—suspension density (MT), solution supersaturation (ΔC), and stirring rate (NP) that influence crystal growth and the nucleation process. We propose and validate two crystallization kinetic models for crystal growth and nucleation rates against STC data. By employing multivariate nonlinear regression analysis, we extract crystallization kinetics parameters using the crystallization kinetics model. We also conduct comparative studies of two crystallization kinetic rates. Our findings reveal that the parameters provided by the kinetic mathematical model align well with the experimental data. Furthermore, the discrepancy between experimental and calculated values is maintained within an acceptable range.
      PubDate: 2023-10-01
       
  • Transition Metal Complexes of 2-Aminopyridine Derivatives as
           Cyclooxygenase Inhibitors: Stability, Spectral, and Thermal
           Characterization, Electrochemical Behavior, DFT Calculations, Molecular
           Docking, and Biological Activities

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      Abstract: A series of Mn(II), Fe(III), and Co(II), complexes with two ligands derived from 2-aminopyridine, 4-hydroxy-2-methyl-N-(2-pyridyl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide (L1) and 2-{[3-(trifluoromethyl)phenyl]-amino}-3-pyridinecarboxylic acid (L2), was prepared and characterized using elemental analysis, molar conductance, TG measurements, IR, UV-Vis, ESR, and magnetic measurements. The coordination mode of L1 and L2 ligands was evaluated and the different geometries around the metals were determined. A complementary computational study using density functional theory (DFT) calculations was carried out to optimize the structures of the metal complexes and to confirm the proposed geometries. Using the same theoretical method, the investigation of the frontier molecular orbitals (FMOs) was used to predict the stability/reactivity of the complexes. The study of the complexation in solution allowed the determination of the stability constants of the complexes confirming their stability in solution. The distribution of the species involving Co(II) over the whole pH-range was also studied. The electrochemical behavior of the ligands and their metal complexes was determined by cyclic voltammetry which revealed irreversible redox processes for all the compounds. The study of the biological activities of the synthesized compounds indicates that the metal complexes displayed enhanced antioxidant and antibacterial properties. Molecular docking results of the Co–L1 complex with bacterial DHPS confirmed that the metal-based compound could efficiently inhibit bacterial growth while the interactions with cyclooxygenase (COX-1 and COX-2) revealed that the compound could act as efficient anti-inflammatory drugs.
      PubDate: 2023-10-01
       
  • Facile Synthesis of Ionic Liquid Derived Fluorescent Carbon Dots for
           Sensitive and Selective Detection of Fe(III) Ion in Aqueous Media

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      Abstract: Recently, increasing levels of Fe3+ in environmental water has become great potential threats for human health. Excess Fe3+ concentration as well as deficiency of the ion has adverse effects in our body system, which demand the development of selective, sensitive and inexpensive sensing probe for Fe3+ detection. This study focused on synthesis of a new photoluminescent carbon dots (CDs) via simple and straightforward hydrothermal method by using an imidazolium based ionic liquid, 1-ethyl-3-methylimidazolium acetate as starting material. The as-prepared nanoparticles were characterized through different spectroscopic and microscopic tools. The CDs exhibit a good fluorescence quantum yield (14.7%) and unique emission behavior. The fluorescence of CDs can be effectively and selectively quenched by ferric ions in aqueous media. Thus, these CDs can be applied as a probe towards selective and sensitive detection of Fe3+ in aqueous media exhibiting a limit of detection of 0.09 μM. The CDs possesses a fluorescence lifetime of 5.62 ns.
      PubDate: 2023-10-01
       
 
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