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CHEMISTRY (594 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 8)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 33)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 17)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 23)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 39)
ACS Nano     Full-text available via subscription   (Followers: 228)
ACS Photonics     Full-text available via subscription   (Followers: 11)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 21)
Acta Chemica Iasi     Open Access   (Followers: 2)
Acta Chimica Sinica     Full-text available via subscription   (Followers: 1)
Acta Chimica Slovaca     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 5)
Advanced Functional Materials     Hybrid Journal   (Followers: 50)
Advanced Science Focus     Free   (Followers: 3)
Advances in Chemical Engineering and Science     Open Access   (Followers: 53)
Advances in Chemical Science     Open Access   (Followers: 13)
Advances in Chemistry     Open Access   (Followers: 14)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Enzyme Research     Open Access   (Followers: 9)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 19)
Advances in Nanoparticles     Open Access   (Followers: 14)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 19)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 2)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 67)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 14)
American Journal of Chemistry     Open Access   (Followers: 26)
American Journal of Plant Physiology     Open Access   (Followers: 13)
American Mineralogist     Hybrid Journal   (Followers: 14)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 159)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 211)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 1)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 3)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 8)
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: 14)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 28)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Atomization and Sprays     Full-text available via subscription   (Followers: 3)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Full-text available via subscription   (Followers: 287)
Biochemistry Insights     Open Access   (Followers: 5)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 9)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 1)
Biomacromolecules     Full-text available via subscription   (Followers: 19)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 109)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 94)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 3)
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: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 3)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 66)
Catalysis for Sustainable Energy     Open Access   (Followers: 6)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 7)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 12)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 70)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 23)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 19)
Chemical Reviews     Full-text available via subscription   (Followers: 174)
Chemical Science     Open Access   (Followers: 21)
Chemical Technology     Open Access   (Followers: 16)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemical Week     Full-text available via subscription   (Followers: 8)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 55)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 25)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 6)
Chemistry & Biology     Full-text available via subscription   (Followers: 30)
Chemistry & Industry     Hybrid Journal   (Followers: 5)
Chemistry - A European Journal     Hybrid Journal   (Followers: 142)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 15)
Chemistry and Materials Research     Open Access   (Followers: 18)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Hybrid Journal   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 45)
Chemistry of Materials     Full-text available via subscription   (Followers: 261)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 22)
Chemistry-Didactics-Ecology-Metrology     Open Access  
ChemistryOpen     Open Access   (Followers: 2)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 2)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 9)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 10)
Chromatographia     Hybrid Journal   (Followers: 24)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Cogent Chemistry     Open Access  
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 10)
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 8)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 3)
Combustion Science and Technology     Hybrid Journal   (Followers: 18)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 2)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 2)
Copernican Letters     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Crystal Structure Theory and Applications     Open Access   (Followers: 3)
CrystEngComm     Full-text available via subscription   (Followers: 11)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 58)
Dalton Transactions     Full-text available via subscription   (Followers: 21)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 4)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 4)
Ecotoxicology and Environmental Contamination     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
EJNMMI Radiopharmacy and Chemistry     Open Access  
Elements     Full-text available via subscription   (Followers: 2)
Environmental Chemistry     Hybrid Journal   (Followers: 9)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Full-text available via subscription   (Followers: 5)
Environmental Science : Nano     Partially Free   (Followers: 1)

        1 2 3 | Last

Journal Cover Chemical Research in Chinese Universities
  [SJR: 0.255]   [H-I: 17]   [3 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1005-9040 - ISSN (Online) 2210-3171
   Published by Springer-Verlag Homepage  [2353 journals]
  • High-efficient synthesis of zeolite LTA via a wet-gel crystallization
    • Authors: Yanyan Ji; Bing Zhang; Wu Zhang; Bo Zhao; Hongbo Li; Dongmei Wang; Ying Li
      Pages: 520 - 524
      Abstract: Abstract Zeolite LTA has been largely used as good adsorbent and detergent builder with a huge amount of demand. Numerous efforts have been devoted to the exploration of new synthetic methods for preparing zeolites more conveniently and efficiently. Herein, we reported a wet-gel crystallization route to synthesize zeolite LTA from simple filtration of the initial reaction mixture followed by heating for crystallization. The products were characterized in detail by means of X-ray diffraction, Raman spectra, scanning electron microscopy and elemental analysis. The yields of the solid products were also investigated, which suggested that the wet-gel method afforded an obvious improvement of products yield compared with the conventional synthesis route. For application as detergent builder, the calcium ion exchange rates of the wet-gel synthesized zeolites were similar with that of conventional LTA zeolites. Therefore the wet-gel route would be potentially important in industry due to its advantages of easy-performing, high-yielding and energy-saving.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-7008-y
      Issue No: Vol. 33, No. 4 (2017)
  • Facile and convenient fabrication of color-controlled colloidal
           magnetically assembled photonic crystals
    • Authors: Aimei You; Yuhua Cao; Guangqun Cao
      Pages: 525 - 529
      Abstract: Abstract A facile, convenient and flexible method to tune the structural color of the colloidal magnetically assembled photonic crystals(CMA-PCs) was proposed. The mechanism to tune structural color could be attributed to the significant influence of the surfactant sodium dodecyl sulfate(SDS) concentration on the particle size, especially on the magnetite content of the superparamagnetic composite nanoparticles(MCNPs). By adjusting SDS concentration in miniemulsion polymerization of MCNPs, CMA-PCs with desired diffraction colors could be obtained.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6310-z
      Issue No: Vol. 33, No. 4 (2017)
  • A novel ratiometric fluorescent probe for cyanide anion with high
           selectivity and its application in cell imaging
    • Authors: Yusha Feng; Lifei Bai; Shaodan Wang; Xiangyi Kong; Lele Cong; Qing Zhao; Qingbiao Yang; Yaoxian Li
      Pages: 534 - 539
      Abstract: Abstract A novel hybrid acenaphthene-hemicyanine dye(Acc) was designed and synthesized as a colorimetric and ratiometric fluorescent sensor for cyanide detection. The nucleophilic addition of cyanide anion resulted in the blocking of the intramolecular charge transfer(ICT). Thus, the sensor exhibited high sensitivity and selectivity towards cyanide anion among many anions in dimethylsulphoxide(DMSO)-water media, with the emission wavelength displaying a very large shift(186 nm). Moreover, the color changes of the solution could be observed by the naked eyes and it had a short response time. Under optimized conditions, the detection limit for cyanide was calculated to be 1.3 μmol/L(R 2=0.9958). In addition, the probe had excellent biocompatibility and could be utilized to monitor cyanide in living cells.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-7036-7
      Issue No: Vol. 33, No. 4 (2017)
  • Quantitative analysis and chemical fingerprint similarity for quality
           control of the seeds of Paeonia suffruticosa Andr. by HPLC
    • Authors: Xiao Tian; Meiqi Yang; Sen Guo; Qingchao Liu; Li Zhang; Chi-Tang Ho; Naisheng Bai
      Pages: 546 - 551
      Abstract: Abstract According to the General Office of the State Council of China, tree peony seeds(TPSs, Paeonia suffruticosa Andr.) are considered an emerging source for edible oil. In Chinese folk medicine, TPSs are used for alleviating waist and leg pain. In the present study, a simple, accurate and rapid fingerprint method based on high performance liquid chromatography with diode array detection(HPLC-DAD) was developed and validated to quantify the profiles of ten representative compounds in TPSs. All standard calibration curves exhibited good linearity(R 2>0.9995) in the HPLC-DAD analysis. The recovery of the standards ranged from 96.37% to 102.10%. The results show that stilbenoids are the major constituents in TPSs, and their total content ranges from 25.71 mg/g to 54.03 mg/g. Suffruticosol A, suffruticosol B, trans-ε-viniferin, ampelopsin E and paeoniflorin are the major components in methanol-water(80:20, volume ratio) extracts with average contents of 3.962, 12.264, 5.826, 14.060 and 12.755 mg/g, respectively. Additionally, 14 batches of seeds collected from different regions were used to establish a reference fingerprint. Their similarity values were higher than 0.944 except for the sample(0.863) from Linxia. These results collectively indicate that the quantitative HPLC fingerprint method can serve as a prerequisite quality control for TPSs, and is a promising resource for developing new herbal or food products.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6463-9
      Issue No: Vol. 33, No. 4 (2017)
  • An improved method of simultaneous determination of four bioactive
           compounds in Evodiae Fructus using ionic liquids as mobile phase additives
           in high performance liquid chromatography
    • Authors: Min Bian; Ling Tian; Cheng Yao
      Pages: 552 - 558
      Abstract: Abstract There are many compounds with different structures and chemical properties in Evodiae Fructus. It is hard to simultaneously determine the bioactive compounds by high performance liquid chromatography(HPLC). A new method was proposed for four bioactive compounds(synephrine, limonoids, evodiamine and rutecarpine) to be separated completely and determined accurately using ionic liquids(ILs) as mobile phase additives. The mechanism and the effect of the ILs for changing the chromatographic behaviors of the four compounds were studied by systematically changing the pH value of mobile phase, the types and concentrations of ILs as well as the concentrations of phosphate buffer. The chromatographic behaviors of the analytes with a mobile phase containing ILs complied with the stoichiometric displacement model for retention(SDM-R). All results demonstrate the dual nature of ionic liquids, which are competitive adsorption and ion-pair agent. Meanwhile, excellent linearity was observed for all the compounds with correlation coefficients between 0.9992 and 0.9998. The limit of detection and the limit of quantification of the four compounds varied from 0.47 μg/mL to 0.87 μg/mL and from 1.79 μg/mL to 2.44 μg/mL, respectively. Three kinds of Evodiae Fructus processed through different methods were analyzed via the method. The result shows that the contents of evodiamine and rutecarpine as the two main active compounds by processing with vinegar and salt are obviously higher than those of the raw products.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6434-1
      Issue No: Vol. 33, No. 4 (2017)
  • Synthesis and pharmacodynamics of ibuprofen-1-acetoxyethyl ester
    • Authors: Bowei Wang; Wanshi Hou; Yingnan Wang; Shaoheng Li; Zhihui Liu; Zhiguang Song
      Pages: 569 - 573
      Abstract: Abstract Ibuprofen(IBU) and its derivatives are widely used in treating many diseases, such as depression, glomerulonephritis, fever caused by common cold or influenza, and rheumatoid arthritis. While in clinical trials, IBU was found to have many side effects. To weaken and prevent these side effects, a derivative called ibuprofen-1-acetoxyethyl ester was synthesized in this paper. The maximum concentration(c max) in a shorter time was compared with IBU at the same dose.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-7103-0
      Issue No: Vol. 33, No. 4 (2017)
  • Preparation of 9,10-diarylphenanthrene derivative and its application in
           full color emitters synthesis
    • Authors: Wenkai Zhao; Zhiming Wang; Xueying Li; Dongdong Zhang; Xiaojuan Zhang; Ping Lu
      Pages: 574 - 580
      Abstract: Abstract As a building block with high photo- and thermo-stability, phenanthrene plays an important role in the preparation of blue(or deep-blue) and full color fluorescence materials. However, some critical issues must be addressed before its full potential can be realised, such as its tedious and low-yield modification processes and the red-shift effect in its aggregated state. In this work, the inexpensive raw material 9,10-phenanthrenequinone(PQ) was chosen as the preparatory functional phenanthrene block. After modifying PQ via halo-substituted, nucleophilic and rearrangement reactions with high yields, the corresponding monomers featured high reactivity and solubility. Compared with classical synthetic approaches for similar phenanthrene-based derivatives, the low efficiency ring-closed reaction and hazardous lithium-injection operation can be omitted using this approach. This new building block demonstrates a clear steric effect following the introduction of peripheral phenyl and alkoxy groups; moreover, stacking in the aggregated state is avoided, which benefits controlling the bandgap and maintaining blue emission as either an emitter or a donor. By changing the central building block in three oligomers, emission of the three primary colors was achieved in solution and film via the conjugated increment and charge-transform effect. This work provides a method of modifying phenanthrene by a simple and efficient synthesis route with inhibition of solid-state aggregation and offers an effective strategy to further develop functional phenanthrene-based building blocks.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-7044-7
      Issue No: Vol. 33, No. 4 (2017)
  • A facile synthetic approach to 3-halo-4-substituted-1,5-dihydro-4 H
           -1,2,4-triazoline-5-thiones based on retro-Michael addition
    • Authors: He Tian; Yuqiang Liu; Xingwei Li; Yafei Xie; Changying Liu; Jianwu Wang; Guilong Zhao
      Pages: 587 - 593
      Abstract: Abstract A facile 3-step synthetic approach to 3-halo-4-substituted-1,5-dihydro-4H-1,2,4-triazoline-5-thiones (1a—1k) from corresponding unhalogenated 8a—8i was developed based on the strategy of retro-Michael addition, with the key steps being regioselective S-alkylation of compounds 8a—8i with ethyl 3-iodopropionate(12c) and alkaline cleavage of the propionate protecting group via retro-Michael addition. The synthetic approach was characterized by simplicity of operation and wide substrate scope.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6491-5
      Issue No: Vol. 33, No. 4 (2017)
  • Synthesis and acetylcholinesterase inhibitory activity of
           polymethoxyflavone Mannich base derivatives
    • Authors: Ling Shi; Yanhua Zhang; Caifang Wang; Haoran Liu; Qiuan Wang
      Pages: 594 - 597
      Abstract: Abstract A series of novel polymethoxyflavone Mannich base derivatives 1―8 was synthesized by Mannich reaction of 5-hydroxy-3,7,3′,4′-tetramethoxyflavone 9 with various secondary aliphatic amines and formaldehyde. Their acetylcholinesterase(AChE) inhibitory activities were evaluated. The results showed that most of them exhibited AChE inhibitory activity and especially piperidin-1-yl methyl substituent derivative 5(IC50=0.238 μmol/L) demonstrated stronger activity comparable with the positive control, neoeserinemethyl sulfate(IC50=1.39 μmol/L), which is worthy of further development as an agent for Alzheimer’s disease treatment.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6462-x
      Issue No: Vol. 33, No. 4 (2017)
  • Total synthesis and high performance liquid chromatography analysis of
           phenylethanolamine A
    • Authors: Tongtong Wang; Yinqing Song; Min Wang; Xiaoyan Tang; Jian Zhou; Mengrui Yang
      Pages: 598 - 602
      Abstract: Abstract A simple, effective and reliable synthetic method was developed to construct beta-agonist phenylethanolamine A(PEAA) in good yield with 4-nitrobenzyl bromide as the starting material, which underwent SN2 reaction with ethyl acetoacetate, followed by hydrolysis with concentrated HCl and amination by Leukart reaction to furnish 4-(4-nitrophenyl)butan-2-amine(A). A one-pot reaction was studied to construct PEAA skeleton and reduced carbonyl with KBH4, the conditions were optimized, including reaction temperature, reaction time, solvent and the molar ratio of 2-bromo-1-(4-methoxyphenyl)ethanone(B) to A. Meanwhile, a reliable and practical high performance liquid chromography(HPLC) method with UV detector was developed after screening wavelength, chromatographic column and optimization of mobile phase. The optimal conditions of detecting PEAA were water(0.1% formic acid and 0.1% triethylamine)-methanol(volume ratio 44:56) at 278 nm with plus-C18 column. The above synthetic method would be used to synthesize standard reference materials and advance extensive application of analytical method. In order to ensure food safety and safeguard human health, the analytical method might be used as a standard method in detection and supervision of PEAA.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6451-0
      Issue No: Vol. 33, No. 4 (2017)
  • Structures, stabilities and work functions of alkali-metal-adsorbed boron
           α 1 -sheets
    • Authors: Tingting Yi; Bing Zheng; Haitao Yu; Ying Xie
      Pages: 631 - 637
      Abstract: Abstract In this study, we employed the density functional theory method to simulate Li-, Na- and K-adsorbed boron α1-sheets(α1-BSTs). After optimizing possible structures, we investigated their thermodynamic stabilities, barriers for metal atom diffusion on the substrate, and work functions. The computed results indicate that the work function of α1-BST decreases significantly after the adsorption of Li, Na and K. Furthermore, under high hole coverage, these alkali-metal-adsorbed α1-BSTs have lower work functions than the two-dimensional materials of greatest concern and the commonly used electrode materials Ca and Mg. Therefore, the Li-, Na- and K-adsorbed α1-BSTs are potential low-work-function nanomaterials.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-7038-5
      Issue No: Vol. 33, No. 4 (2017)
  • Effect of Cu(II) on degradation and decolorization of rhodamine B in
           subcritical water
    • Authors: Kai Cheng; Wei Yang; Hui Wang; Jie Zhou; Shengji Wu; Tianming Yu; Jianbo Pan
      Pages: 643 - 647
      Abstract: Abstract In this paper, subcritical water, an environmentally friendly solvent, was employed to degrade rhodamine B, which served as a model dye in textile industrial effluents. The effect of Cu(II) on the degradation of rhodamine B was evaluated. Further, the degradation kinetics of rhodamine B in subcritical water was evaluated via a Weibull model. The results show that subcritical water could efficiently degrade and decolorize rhodamine B. The addition of Cu(II) into subcritical water could accelerate the degradation of rhodamine B and lower the temperature for its complete degradation. The Weibull equation could well express the degradation kinetics of rhodamine B. The calculated rate constants showed Arrhenius behavior and presented high correlation coefficients. The activation energy was 109.4 kJ/mol for subcritical water degradation of rhodamine B, whereas it became lower(93.4 kJ/mol) when Cu(II) was added to the subcritical water. The frequency factors for the degradation of rhodamine B by subcritical water without and with Cu(II) were calculated to be 1.0×1011 and 3.2×109 min‒1, respectively. The above results indicate that subcritical water treatment is a promising process for degrading and decolorizing textile dyes. The results will provide a theoretic support for the industrial application of subcritical water treatment.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6501-7
      Issue No: Vol. 33, No. 4 (2017)
  • Solvothermal synthesis of magnetic Fe 3 O 4 nanospheres and their
           efficiency in photo-Fenton degradation of xylenol orange
    • Authors: Kai Zheng; Mingyu Di; Jubo Zhang; Wenhui Bao; Daxin Liang; Guangsheng Pang; Zhenxing Fang; Chunyuan Li
      Pages: 648 - 654
      Abstract: Abstract Magnetic Fe3O4 nanospheres with a average diameter of (201±0.5) nm were synthesized at 200 °C via a solvothermal method. The as-synthesized Fe3O4 nanospheres performed an efficiency in the Fenton degradation of xylenol orange with a degradation rate of 90%—95%. Additionally, the catalyst was easily recyclable and the recovery rate was greater than 90%. Moreover, the catalyst could be regenerated under an ultrasonic treatment, and the degradation performance remained essentially the same. More importantly, the degradation rate varied with respect to the amount of H2O2 and the pH of the best reaction process. And the reaction efficiency was achieved with 1.5 mL of H2O2 in an acidic environment.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6493-3
      Issue No: Vol. 33, No. 4 (2017)
  • Preparation of Pt/ γ -Al 2 O 3 -C heterogeneous catalyst for highly
           selective hydrogenation of cinnamaldehyde towards cinnamyl alcohol
    • Authors: Jun Ma; Yang Lan; Hui Mao; Yang Liao; Shilin Zhao
      Pages: 660 - 665
      Abstract: Abstract A Pt/γ-Al2O3-C heterogeneous catalyst with improved catalytic performance was successfully prepared. Bayberry tannin(BT), an abundant natural plant polyphenol, was utilized to modifiy the surface of the γ-Al2O3 matrix and then stabilize Pt nanoparticles(NPs). The catalyst was systematically and specifically characterized by a collection of analytic tools including XRD, XPS, FTIR, TEM, and TG. It was found that the Pt NPs were envenly dispered on the γ-Al2O3-C matrix. Meanwhile, when the catalyst was applied for selective hydrogenation of cinnamalde-hyde(CMA) in the presence of KOH promoter in solvent, excellent catalytic performance was obtained. The selectivity to cinnamyl alcohol(CMO) reached 97.88% with 88.45% CMA conversion within 30 min in the presence of 0.037 mol/L KOH, without significant loss of catalytic activity even under cyclic measurements for 5 times. The excellent catalytic performances should be ascribed predominantly to the uniform and stable dispersion of Pt NPs on the γ-Al2O3-C matrix and the excellent heat stability of BT.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6345-1
      Issue No: Vol. 33, No. 4 (2017)
  • Effect of amine structure on CO 2 capture performance of amine-modified
    • Authors: Qiuping Tang; Wei Jiang; Gengshen Hu
      Pages: 666 - 671
      Abstract: Abstract To investigate the relative CO2 capture performance of “molecular basket” type solid amine sorbents with varying amine structural characteristics, two model amine isomers, triethylenetetramine(TETA) and tris(2-aminoethyl)-amine(TAEA), were chosen alongside mesoporous silica SBA-15 as a support. The CO2 capture performance of each amine derivative was evaluated using a breakthrough method with a fixed-bed reactor. The results show that, in the absence of moisture, the SBA-TETA sorbents show better CO2 capture performance than the SBA-TAEA sorbents; on the other hand, in the presence of moisture, the SBA-TAEA sorbents show slightly improved uptake compared to the SBA-TETA sorbents. The tertiary amine groups, such as those found on TAEA, are known to be un-reactive with CO2 in the absence of moisture, but is activated in the presence of moisture may account for these findings.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6340-6
      Issue No: Vol. 33, No. 4 (2017)
  • Effect of reduction and carburization pretreatment on iron catalyst for
           synthesis of light olefins from CO hydrogenation
    • Authors: Tong An; Dan Dang; Yi Cheng
      Pages: 672 - 677
      Abstract: Abstract Effect of reduction and carburization pretreatment on iron catalyst for CO hydrogenation to light olefins was investigated. The bulk structure and surface composition of the catalysts during pretreatment were characterized by means of X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and high-resolution transmission electron microscopy(HRTEM). The results indicated that phase transformation of iron phases involved α-Fe2O3→Fe3O4→α-Fe both in the bulk and on the surface layers in hydrogen atmosphere. However, α-Fe2O3 was firstly transformed to Fe3C and then to Fe5C2 in CO atmosphere, while in syngas atmosphere directly to Fe5C2. As carburization pretreatment time was prolonged, the degree of carburization on the surface increased, and the increase degree of iron catalyst carburization in CO pretreatment was stronger than that in syngas pretreatment. It inferred that surface carbon species was more easily formed in syngas pretreatment instead of iron carbide in CO pretreatment. After hydrogen pretreatment, when the catalyst was reduced to a mixture of magnetite and metallic iron, the selectivity to light olefins was relatively low. Under the joint effects of the active sites from surface iron carbide and surface carbon layers blocking the active sites, longer CO pretreatment time resulted in higher methane selectivity and less light olefins. The selectivity to methane on H2-pretreated catalyst was lower than that of CO-pretreated catalyst.
      PubDate: 2017-08-01
      DOI: 10.1007/s40242-017-6316-6
      Issue No: Vol. 33, No. 4 (2017)
  • One-pot hydrothermal synthesis of novel NiCoO 2 /reduced graphene oxide
           composites for supercapacitors
    • Authors: Hongzhi Wang; Xin Shi; Yulei Shi; Weiguo Zhang; Suwei Yao
      Abstract: Abstract Novel NiCoO2/rGO composites with a structure of NiCoO2 nanoparticles anchored on layers of reduced graphene oxide(rGO) were synthesized via a simple one-pot hydrothermal method and were used as faradaic elec-trodes for supercapacitors. The microstructures of NiCoO2/rGO composites were characterized by means of field emission scanning electron microscopy(FESEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and thermogravimetric analysis(TGA). When acting as faradaic electrodes for supercapacitors, NiCoO2/rGO compo-sites exhibited a specific capacity of 288 C/g at the current density of 2 A/g and maintained 139.98 C/g at 20 A/g. High capacity retention ratios up to 88% could be achieved after 1000 cycles at a current density of 2 A/g. The out-standing cycling stability was primarily attributed to the combination of mixed transition metal oxides and rGO, which not only maintains a high electrical conductivity for the overall electrode but also prevents the aggregation and volume expansion of electrochemical materials during the cycling processes.
      PubDate: 2017-07-01
      DOI: 10.1007/s40242-017-7026-9
  • Preparation of Fe 3 O 4 -porphyrin nano-composited particles and their
           optical and magnetic properties
    • Authors: Ximing Guo; Bin Guo
      Abstract: Abstract Magnetic Fe3O4 nanoparticles were synthesized via the coprecipitation of ferrous and ferric ion. The morphology and magnetic properties of the magnetic Fe3O4 nanoparticles were investigated by transmission electron microscopy(TEM) and superconducting quantum interference device. Furthermore, the Fe3O4-porphyrin nanocomposite particles(FeOPNCPs) are prepared with Fe3O4 and porphyrin by sol-gel method. The patterns of FeOPNCPs were also characterized by means of scanning electron microscopy(SEM) and TEM. The optical and magnetic properties of FeOPNCPs were investigated on a UV-Vis spectrophotometer, a fluorescence spectrophotometer and a superconducting quantum interference device. These experimental results show that FeOPNCPs not only possess optical features of porphyrin but also retain the superparamagnetic features of Fe3O4 nanoparticles.
      PubDate: 2017-06-08
      DOI: 10.1007/s40242-017-6261-4
  • Synthesis and cytotoxic activities of spin-labeled derivatives of
    • Authors: Jinhua Guo; Bei Tan; Qingmei Ye; Guangping Liang; Min Yi; Renwang Jiang
      Abstract: Abstract Two series of novel spin-labeled derivatives of Cinobufagin(compounds 5 and 8a―8f in series 1 with five-membered ring nitroxyl free radical and compounds 6 and 9a―9f in series 2 with six-membered ring nitroxyl free radical) were synthesized. The cytotoxic activities in vitro against two tumor cell lines(HepG2 and HeLa) were evaluated, and the results indicate that all compounds display potent cytotoxicity against HepG2 and HeLa cells, and most compounds show better activities on HeLa cells than on HepG2 cells except for compounds 8a and 9d. Generally, the compounds in series 2 have more potent cytotoxic activity against HepG2 than the compounds in series 1. Especially, compounds 6 and 9f in series 2 exhibit even more potent activities against the two tumor cell lines than Cinobufagin. Thus incorporation of different L-amino acids as the linker changed the cytotoxic profile of the spin-labeled Cinobufagin. In addition, the representative compound 9f significantly changed the cell cycle distribution and led to HeLa cell cycle arrested at G2/M phase.
      PubDate: 2017-06-08
      DOI: 10.1007/s40242-017-7025-x
  • Nanopattern transformation of ABC triblock copolymer thin films induced by
           strong solvent selectivity and annealing
    • Authors: Hailiang Huang; Xihong Zu; Guobin Yi; Benbin Zhong; Hongsheng Luo
      Abstract: Abstract Nanopattern transformation behaviors of polyisoprene-block-polystyrene-block-poly(2-vinylpyridine) (PI-b-PS-b-P2VP) asymmetric ABC triblock copolymer were investigated systematically with various control para-meters, including different solvents for polymer solution and annealing conditions in this paper. Ordered nanopattern of PI-b-PS-b-P2VP with hexagonal cylinders could be obtained when PI-b-PS-b-P2VP toluene solution was spin-coated on silicon substrate followed by toluene vapor annealing process. When the film with hexagonal and cylindrical nanopattern was exposed to saturated toluene vapor, the order-order transition of cylindrical nanopattern to parallel nanopattern was observed due to the strong selectivity of toluene to PS and PI blocks. Furthermore, fingerprint nanopattern could also be obtained by solvent annealing in tetrahydrofuran vapor. The nanopattern trans-formation was due to different selectivity of solvents and incompatibilities of the three blocks of PI-b-PS-b-P2VP under various solvent annealing conditions.
      PubDate: 2017-06-03
      DOI: 10.1007/s40242-017-6381-x
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