Subjects -> CHEMISTRY (Total: 1001 journals)
    - ANALYTICAL CHEMISTRY (59 journals)
    - CHEMISTRY (726 journals)
    - CRYSTALLOGRAPHY (23 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (45 journals)
    - ORGANIC CHEMISTRY (49 journals)
    - PHYSICAL CHEMISTRY (71 journals)

CHEMISTRY (726 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
Accounts of Materials Research     Hybrid Journal  
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 36)
ACS Applied Polymer Materials     Hybrid Journal   (Followers: 15)
ACS Catalysis     Hybrid Journal   (Followers: 78)
ACS Chemical Neuroscience     Hybrid Journal   (Followers: 25)
ACS Combinatorial Science     Hybrid Journal   (Followers: 25)
ACS Macro Letters     Hybrid Journal   (Followers: 34)
ACS Materials Letters     Open Access   (Followers: 4)
ACS Medicinal Chemistry Letters     Hybrid Journal   (Followers: 49)
ACS Nano     Hybrid Journal   (Followers: 451)
ACS Photonics     Hybrid Journal   (Followers: 19)
ACS Symposium Series     Full-text available via subscription   (Followers: 3)
ACS Synthetic Biology     Hybrid Journal   (Followers: 40)
Acta Chemica Iasi     Open Access   (Followers: 8)
Acta Chemica Malaysia     Open Access  
Acta Chimica Slovaca     Open Access   (Followers: 4)
Acta Chimica Slovenica     Open Access   (Followers: 2)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 10)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 9)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 10)
Adsorption Science & Technology     Open Access   (Followers: 9)
Advanced Electronic Materials     Hybrid Journal   (Followers: 7)
Advanced Functional Materials     Hybrid Journal   (Followers: 81)
Advanced Journal of Chemistry, Section A     Open Access   (Followers: 15)
Advanced Journal of Chemistry, Section B     Open Access   (Followers: 14)
Advanced Science Focus     Free   (Followers: 7)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advanced Therapeutics     Hybrid Journal   (Followers: 1)
Advances in Chemical Engineering and Science     Open Access   (Followers: 108)
Advances in Chemical Science     Open Access   (Followers: 50)
Advances in Chemistry     Open Access   (Followers: 39)
Advances in Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 21)
Advances in Drug Research     Full-text available via subscription   (Followers: 27)
Advances in Environmental Chemistry     Open Access   (Followers: 11)
Advances in Enzyme Research     Open Access   (Followers: 13)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 20)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 11)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 35)
Advances in Nanoparticles     Open Access   (Followers: 20)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 20)
Advances in Polymer Science     Hybrid Journal   (Followers: 54)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 19)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 22)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 7)
Advances in Science and Technology     Full-text available via subscription   (Followers: 17)
Aerosol Science and Engineering     Hybrid Journal  
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 6)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Aggregate     Open Access   (Followers: 3)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 3)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alchemy : Journal of Chemistry     Open Access   (Followers: 5)
Alchemy : Jurnal Penelitian Kimia     Open Access   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
Alotrop     Open Access  
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 71)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 24)
American Journal of Chemistry     Open Access   (Followers: 41)
American Journal of Plant Physiology     Open Access   (Followers: 13)
Analyst     Full-text available via subscription   (Followers: 40)
Analytical Science Advances     Open Access   (Followers: 2)
Angewandte Chemie     Hybrid Journal   (Followers: 236)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 353)
Annales Universitatis Mariae Curie-Sklodowska, sectio AA – Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 8)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 4)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 6)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 9)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 13)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 16)
Antiviral Chemistry and Chemotherapy     Open Access   (Followers: 2)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 12)
Applied Spectroscopy     Full-text available via subscription   (Followers: 27)
Applied Surface Science     Hybrid Journal   (Followers: 33)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Applied Chemistry Research     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 3)
Asian Journal of Chemical Sciences     Open Access   (Followers: 1)
Asian Journal of Chemistry and Pharmaceutical Sciences     Open Access   (Followers: 2)
Asian Journal of Physical and Chemical Sciences     Open Access   (Followers: 3)
Atomization and Sprays     Full-text available via subscription   (Followers: 8)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 7)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 11)
Biochemistry     Hybrid Journal   (Followers: 484)
Biochemistry Insights     Open Access   (Followers: 7)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 11)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 3)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 4)
Biomacromolecules     Hybrid Journal   (Followers: 27)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 11)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 4)
BioNanoScience     Partially Free   (Followers: 6)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 215)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 88)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 4)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 26)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 5)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 13)
Canadian Mineralogist     Full-text available via subscription   (Followers: 7)
Carbohydrate Polymer Technologies and Applications     Open Access   (Followers: 3)
Carbohydrate Polymers     Hybrid Journal   (Followers: 13)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 76)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 9)
Catalysis Science and Technology     Hybrid Journal   (Followers: 13)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysts     Open Access   (Followers: 14)
Cell Reports Physical Science     Open Access  
Cellulose     Hybrid Journal   (Followers: 17)
Cereal Chemistry     Full-text available via subscription   (Followers: 6)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 3)
ChemCatChem     Hybrid Journal   (Followers: 11)
Chemical and Engineering News     Free   (Followers: 24)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 88)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 28)
Chemical Physics Letters : X     Open Access   (Followers: 4)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 4)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 25)
Chemical Reviews     Hybrid Journal   (Followers: 267)
Chemical Science     Open Access   (Followers: 44)
Chemical Science International Journal     Open Access   (Followers: 1)
Chemical Technology     Open Access   (Followers: 71)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 56)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 23)
ChemInform     Hybrid Journal   (Followers: 9)
Chemistry     Open Access  
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 31)
Chemistry & Industry     Full-text available via subscription   (Followers: 8)
Chemistry - A European Journal     Hybrid Journal   (Followers: 224)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 20)
Chemistry Africa : A Journal of the Tunisian Chemical Society     Hybrid Journal  
Chemistry and Materials Research     Open Access   (Followers: 24)
Chemistry Central Journal     Open Access   (Followers: 5)
Chemistry Education Research and Practice     Free   (Followers: 8)
Chemistry Education Review     Open Access   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry Letters     Full-text available via subscription   (Followers: 49)
Chemistry of Heterocyclic Compounds     Hybrid Journal   (Followers: 4)
Chemistry of Materials     Hybrid Journal   (Followers: 338)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 10)
Chemistry World     Full-text available via subscription   (Followers: 20)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 1)
ChemistrySelect     Hybrid Journal  
Chemistry–Methods     Open Access   (Followers: 2)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
ChemNanoMat     Hybrid Journal   (Followers: 1)
Chemoecology     Hybrid Journal   (Followers: 3)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
Chemosensors     Open Access   (Followers: 1)
ChemPhotoChem     Hybrid Journal  
ChemPhysChem     Hybrid Journal   (Followers: 14)
ChemPlusChem     Hybrid Journal   (Followers: 2)
Chempublish Journal     Open Access   (Followers: 1)
ChemSystemsChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal   (Followers: 1)
CHIMIA International Journal for Chemistry     Open Access   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 13)
Chromatographia     Hybrid Journal   (Followers: 22)
Chromatography     Open Access   (Followers: 3)
Chromatography Research International     Open Access   (Followers: 5)
Ciencia     Open Access   (Followers: 1)
Clay Minerals     Hybrid Journal   (Followers: 9)
Cogent Chemistry     Open Access   (Followers: 3)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 12)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 8)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 24)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)

        1 2 3 4 | Last

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American Journal of Chemistry
Number of Followers: 41  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2165-8749 - ISSN (Online) 2165-8781
Published by SAP Homepage  [105 journals]
  • The Impact of Solid Waste Leachates on Soil and Edible Plants within
           Unlined Dumpsite in Awka, Anambra State

    • Abstract: Publication year: 2020Source: American Journal of Chemistry, Volume 10, Number 1Chiedozie Chukwuemeka Aralu, Patrice-Anthony Chudi OkoyeHeavy metals from non-sanitary dumpsites have significantly polluted the environment and their measurement in environment is necessary to develop health management strategies. The concentrations of heavy metals such as lead, mercury, zinc, cadmium, chromium, arsenic, iron, nickel, cobalt, selenium, copper were studied using Atomic absorption spectrophotometry on soil and vegetable samples such as Telfairia occidentalis, Talinum triangulare and Amaranthus hydridus from unlined dumpsite in Awka. Sixteen upstream and sixteen downstream (control) samples were collected during the rainy season for four months. The heavy metals concentrations in the upstream site were higher than the downstream site, which was attributed to mobility of metals from dumpsites to farmlands through leaching. The concentrations of heavy metals in vegetable samples in both sites were above the permissible limits specified by WHO/FAO standards. The estimated daily dietary intake, health risk index and target hazard quotient showed that the vegetables poses public health related risks to the human population residing within the dumpsite environment. It is concluded that the use of unlined dumpsites can increase the environmental and public health problems of the inhabitants.
  • Physico-chemical Analysis of Engine Coolants for Sale in Brazzaville

    • Abstract: Publication year: 2020Source: American Journal of Chemistry, Volume 10, Number 1Jean Bruno Mokoko, Victor N'goka, Enoua Guy Crépin, Lyi Phassole Loemba MbatchiThis study focuses on the analysis of coolants in automotive engines for sale in Brazzaville. The parameters; pH, refractive index, densities and spectrum in the ultraviolet were measured. It follows that the colours of the coolants for sale in Brazzaville are random, the refractive indices are comparable to that of water except for one product, 50% of coolants have acidic pH and are known to degrade engines, 85% appear to be stained with paint dyes for sale in hardware stores, or those of the sky and/ or ice cream on sale in the markets. These liquids do not contain ethylene glycol except for one product. And, generally speaking, coolants for sale in Brazzaville are not compliant.
  • The Mechanism of Nitric Acid Degradation of the C-glycoside Aloin to

    • Abstract: Publication year: 2020Source: American Journal of Chemistry, Volume 10, Number 1Francisco Sánchez-Viesca, Reina GómezAlthough the majority of natural glycosides are O-glycosides, there are many examples of C- glycosides. Since in these glycosides the aglycone and the sugar are linked by a C-C bond they cannot be cleaved by acid hydrolysis. So, various biochemical procedures using enzymes or bacteria have been described for this purpose. However, these methods are troublesome and time consuming. A chemical degradation using nitric acid has been informed in a U.S. Patent, but there is no theoretical approach to this procedure. In this communication we provide a sustained reaction mechanism for this hydrolytic and oxidative degradation. The electron flow for each step is given and also an explanation of why simple hydrolysis cannot work, pointing out at which step the reaction comes to a stop.
  • Assessing the Impact of Online Video Tutorials on Student Performance in a
           Chemistry Course

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 6Ozgur Ecevit, Sumeyra Yumak, Hasan YumakEducational technology has fostered students' abilities and revolutionized the way they work and think in many areas of higher education. This study investigates the integration of video tutorials as a complement to learning in a nursing chemistry course at a community college setting. Tutorial videos aimed to supplement lectures and labs on the topics of soluble and insoluble salts, solubility rules, solution stoichiometry, and balancing precipitation reactions were designed using video recording tool Loom and were uploaded to the course Web site portal, Blackboard. The results of our study show that using video tutorials, which are a beneficial, adaptable, and affordable tool in teaching nursing chemistry, significantly improved student learning.
  • Complexes of Co(II), Cu(II) and Ni(II) with Antineoplastic Agent Imatinib
           Mesylate: Synthesis, Characterization and Biological Activity

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 6Amira Cipurković, Snježana Marić, Emir Horozić, Snježana Hodžić, Darja Husejnagić, Lamija Kolarević, Amila Zukić, Demir BjeloševićThe aim of this work was to investigate the interaction of Imatinib mesylate with biological ions Cu(II), Co(II) and Ni(II) in ethanol/water solutions. Structures of synthesized complexes were characterized by spectroscopy methods. Stereo-microscopy was used for determination of morphological properties of obtained crystals. The results of IR spectroscopy showed that biogenic metal complexes with ImM were formed through the oxygen donors of mesylate ion. Changes of crystals colours and sizes of the parent ligand and complexes were clearly seen. Antimicrobial screening revealed a significant effect of Co(ImM)2 complex on the tested microorganisms. This complex also showed significant antioxidant activity compared to Ni(II) and Cu(II) complexes.
  • Some Antibacterial and Antifungal Compounds from Root Bark of Rhus

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 5Peter W. Njoroge, Sylvia A. OpiyoPhytochemical studies on Rhus natalensis root bark collected from Iten, Kenya led to isolation and characterization of five compounds namely epicatechin (1), 3β-sitosterol (2), 3β-sitosterol glucoside (3), stigmasterol (4) and lupeol (5). The structures of the isolated compounds were established using spectroscopic techniques as well as by physical methods. The compounds were tested for bacterial and antifungal activities against Staphylococcus aureus (ATCC no. 25923), Bacillus subtilis (local isolate), Escherichia coli (ATCC no. 25922), Pseudomonas aeruginosa (ATCC no. 10622), Candida albicans, Penicillium notatum and Aspergillus Niger. All the compounds showed antibacterial and antifungal activities against the test pathogens. Compounds 1, 3 and 5, exhibited moderate activity while compounds 2 and 3 showed low activity. These results further confirm the efficacy of extracts of Rhus species in treating bacterial and fungal infections.
  • Adsorption of Rhodamine B onto Orange Peel Powder

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 5Abia Daouda, Amana Tokodne Honorine, Noumi Guy Bertrand, Domga Richard, DomgaAdsorption studies of Rhodamine B (Rh B) on various raw materials and thermally modified biosorbent were carried out by batch experiments. The influence of major parameters governing the efficiency of the process such as, initial dye concentration, adsorbent dose, pH, contact time and temperature on the removal of process where explored. The linear regression coefficient R2 was used to clarify the best adjustment isotherm model. All isotherm models, Langmuir, Temkin, Dubinin and Freundlich were found to be best adapting models. The monolayer adsorption capacities (qm) vary between 10.101 to 10.172 mg/g for adsorbents PPOAT and PPOAS. The Lagergen pseudo-second order model best fits the kinetics of adsorption and the correlation coefficient R2 for second order model has very high values of R2 for the PPOAT, PPOAA, PPOAS (R2 =0.999, 0.994 and 0.979 respectively) and qe (cal) values are in good harmony with qe (exp). Its shows that adsorption of Rh B on these orange peels powders activated thermally and chemically follow the kinetics second order and chemisorption playing roll in speed determinant step. Adsorption of Rh B on adsorbents was found to decrease on increasing pH, increasing temperature and increasing adsorbent dose. Thermodynamic analysis proved that adsorption was exothermic, spontaneous physisorption, and decreased disorder at the interface of Rh B with biosorbents.
  • Synthesis, Spectrometric Characterization, X-Ray Study and Quantum
           Chemical Calculations of 2-oxo-2H-chromen-7-yl 4-chlorobenzoate

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 5Abdoulaye Djandé, Akoun Abou, Jules Yoda, Stéphane Coussan, Adama SabaCompound (I), 2-oxo-2H-chromen-7-yl 4-chlorobenzoate, was synthesized by linking the coumarin system (7-hydroxycoumarin) to a 4-chlorobenzoyl chloride. ESI-MS, FT-IR, 1H and 13C NMR spectroscopic analysis and X-ray diffractometry determined the molecular structure of this 7-substituted coumrin derivative. In the latter, the structure of (I) was solved by direct methods and refined to a final R value of 0.035 for 2416 independent reflections. In the structure, the benzene ring is oriented at an acute angle of 58.80 (13)° relative to the planar coumarin system [r.m.s deviation = 0.017 Å]. This conformation is stabilized by an intramolecular C—H…O hydrogen bond, which closes a five-membering ring. The molecules of the studied compound are linked by intermolecular C—H…O hydrogen bonds forming an undulating network along the b-axis direction. Besides, the crystal structure is supported by π–π stacking interactions between neighboring benzene and pyrone or coumarin rings [centroid–centroid distances in the range 3.5695(13)–3.5914(16) Å], as well as C=O···π interactions [O···centroid distances in the range 3.366(4)–3.387(4) Å]. The molecular geometry of (I) was also optimized using density functional theory (DFT/RB3LYP), restricted Moller-Plesset perturbation theory (RMP2) methods with the 6-311++G(d, p) basis set in ground state and frequency calculations using RB3LYP method with 6-31G(d) basis set. The theoretical data resulting from these quantum chemical calculations are in good agreement with the observed structure. The only observed difference in the torsion angles is between the coumarin ring system and the benzoate ring, where the observed C—O—C—C value (65.3 (4)°) is slightly lower than the RMP2 computed value (68.34°) and larger than that of the DFT/RB3LYP calculated value (55.47°) and the frequency calculations (44.08°) value. Molecular orbital calculations providing electron-density plots of HOMO and LUMO molecular orbitals have been computed with the DFT/B3LYP/6–311++G(d,p), RMP2/6–311++G(d,p) and FREQ/ B3LYP/6–31G(d) basis sets whereas molecular electrostatic potentials (MEP) were determined at the DFT/B3LYP/6–311++G(d,p) and FREQ/ B3LYP/6–31G(d) levels. The theoretical HOMO–LUMO energy gap values originating from these calculations are 4.44 eV (DFT/B3LYP/6–311++G(d,p)) and 4.40 eV (FREQ/ B3LYP/6–31G(d)). Hirshfeld surface analysis has been used to confirm and quantify the supramolecular interactions.
  • On the Mechanism of the Neumann-Wender Glucose Test

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 4Francisco Sánchez-Viesca, Reina GómezThis sensitive test for glucose in urine is based on the discolouration of a methylene blue solution by reaction with glucose in alkaline medium. This reaction, combined with aerial oxidation to restore the blue colour has been widely used as a showy experiment. However, the mechanism of the involved reactions has not been advanced and we provide it in this communication. The glucose enolate combines with methylene blue and then an oxido-reduction takes place by a concerted mechanism. The last reaction is a Friedemann cleavage of an alpha-ketoaldehyde into acids by means of hydrogen peroxide in alkaline medium. The mechanism of this fragmentation has been also cleared up.
  • Catalytic Activation and Deactivation of Pt-Pd Film Immobilized on Nafion
           Surface in Attaining Decomposition of Hydrogen Peroxide

    • Abstract: Publication year: 2019Source: American Journal of Chemistry, Volume 9, Number 4M. M. Alam, M. Humayun Kabir, M. Ahsan, S. M. Borhan Uddin, I. A. Siddiquey, M. A. HasnatBi-metallic Pt-Pd catalytic films were immobilized on Nafion-117 membrane to decompose hydrogen peroxide. A basic medium helps to enhance autocatalysis of hydrogen peroxide decomposition reaction. Although H2O2 decomposition is strongly increased by the presence of iodide ions and sodium dodecyl sulfate species but they deactivate the catalytic surface. Among several sulfate salts (CoSO4.7H2O, K2SO4 and CuSO4), only NiSO4.7H2O influenced to increase the reaction rate. Meanwhile, the Hg2+ species not only inhibits the decomposition process but also permanently damage the activity of the catalytic surface.
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