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  Subjects -> CHEMISTRY (Total: 881 journals)
    - ANALYTICAL CHEMISTRY (54 journals)
    - CHEMISTRY (616 journals)
    - CRYSTALLOGRAPHY (21 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (43 journals)
    - ORGANIC CHEMISTRY (48 journals)
    - PHYSICAL CHEMISTRY (71 journals)

CHEMISTRY (616 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 14)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Hybrid Journal   (Followers: 43)
ACS Chemical Neuroscience     Hybrid Journal   (Followers: 21)
ACS Combinatorial Science     Hybrid Journal   (Followers: 23)
ACS Macro Letters     Hybrid Journal   (Followers: 25)
ACS Medicinal Chemistry Letters     Hybrid Journal   (Followers: 41)
ACS Nano     Hybrid Journal   (Followers: 280)
ACS Photonics     Hybrid Journal   (Followers: 14)
ACS Symposium Series     Full-text available via subscription  
ACS Synthetic Biology     Hybrid Journal   (Followers: 24)
Acta Chemica Iasi     Open Access   (Followers: 5)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chimica Slovenica     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: 7)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 7)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Adsorption Science & Technology     Open Access   (Followers: 6)
Advanced Functional Materials     Hybrid Journal   (Followers: 57)
Advanced Science Focus     Free   (Followers: 5)
Advances in Chemical Engineering and Science     Open Access   (Followers: 67)
Advances in Chemical Science     Open Access   (Followers: 18)
Advances in Chemistry     Open Access   (Followers: 21)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19)
Advances in Drug Research     Full-text available via subscription   (Followers: 24)
Advances in Environmental Chemistry     Open Access   (Followers: 5)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 11)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 25)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 16)
Advances in Polymer Science     Hybrid Journal   (Followers: 44)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
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: 3)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 65)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 20)
American Journal of Chemistry     Open Access   (Followers: 30)
American Journal of Plant Physiology     Open Access   (Followers: 11)
American Mineralogist     Hybrid Journal   (Followers: 15)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 169)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 247)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 5)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
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: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Open Access   (Followers: 2)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 9)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 32)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 2)
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Hybrid Journal   (Followers: 360)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 10)
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: 2)
Biomacromolecules     Hybrid Journal   (Followers: 21)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 134)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 87)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     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: 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: 6)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 70)
Catalysis for Sustainable Energy     Open Access   (Followers: 8)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 10)
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: 20)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 74)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 22)
Chemical Reviews     Hybrid Journal   (Followers: 191)
Chemical Science     Open Access   (Followers: 25)
Chemical Technology     Open Access   (Followers: 26)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 56)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 24)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 32)
Chemistry & Industry     Hybrid Journal   (Followers: 7)
Chemistry - A European Journal     Hybrid Journal   (Followers: 159)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 16)
Chemistry and Materials Research     Open Access   (Followers: 21)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Open Access   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 43)
Chemistry of Materials     Hybrid Journal   (Followers: 260)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 19)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 12)
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: 11)
Chromatographia     Hybrid Journal   (Followers: 24)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 6)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Cogent Chemistry     Open Access   (Followers: 1)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 11)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 22)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Communications Chemistry     Open Access  
Composite Interfaces     Hybrid Journal   (Followers: 7)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
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: 10)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 4)
Copernican Letters     Open Access   (Followers: 1)
Corrosion Series     Full-text available via subscription   (Followers: 6)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 6)
Croatica Chemica Acta     Open Access  
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Chromatography     Hybrid Journal  
Current Green Chemistry     Hybrid Journal  
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Microwave Chemistry     Hybrid Journal  
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 14)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 69)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 3)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
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  

        1 2 3 4 | Last

Journal Cover
Chemical Research in Chinese Universities
Journal Prestige (SJR): 0.261
Citation Impact (citeScore): 1
Number of Followers: 3  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1005-9040 - ISSN (Online) 2210-3171
Published by Springer-Verlag Homepage  [2348 journals]
  • A Highly Selective and Sensitive Ratiometric Fluorescent Probe for
           Hypochlorite and Its Application
    • Authors: Longqi Xue; Yusha Feng; Yan Song; Rui Wang; Dahai Liu; Jianshi Du; Qingbiao Yang; Yaoxian Li
      Pages: 536 - 540
      Abstract: Abstract A novel water-soluble hybrid fluorescein-coumarin dye(FLNC) fluorescence ratiometric probe to recognize OCl− was designed and synthesized. The most prominent feature of the probe is that the molecular structure contains two different fluorophores, and the fluorescein moiety was connected to coumarin moiety by diacylhydrazine linker. When OCl− was added, the two fluorophores in the FLNC probe could have a rapid respond simultaneously, with high selectivity and sensitivity towards OCl– among other reactive oxygen species/reactive nitrogen species(ROS/RNS) and anions, and the detection limit was measured to be 0.30 μmol/L. In addition, the color changes of the solution could be observed by the naked eye and have a short response time(completed within 1 min), which suggestes that the probe FLNC has the potential to be used for real-time detection.
      PubDate: 2018-08-01
      DOI: 10.1007/s40242-018-8028-y
      Issue No: Vol. 34, No. 4 (2018)
       
  • Copper-catalyzed ortho -Monofluorination of Aniline Derivatives with
           Selectfluor Directed by Picolinic Acid Amides
    • Authors: Yingchao Zhang; Chunxia Wen; Changjing Zhang; Jizhen Li
      Pages: 552 - 558
      Abstract: Abstract A novel and facile method for selective ortho-C―H monofluorination of aniline derivatives was achieved using Selectfluor/Cu(OAc)2/HOAc system. The reaction proceeded via electrophilic process with diverse substrates in acceptable moderate to high yields. The position selectivity was controlled by bidentate coordination of picolinic acid amides with copper.
      PubDate: 2018-08-01
      DOI: 10.1007/s40242-018-8113-2
      Issue No: Vol. 34, No. 4 (2018)
       
  • Structure and Excitation Dynamics of β -Carotene Aggregates in
           Cetyltrimethylammonium Bromide Micelle
    • Authors: Di Zhang; Liming Tan; Jia Dong; Jiaqiang Yi; Peng Wang; Jianping Zhang
      Pages: 643 - 648
      Abstract: Abstract The β-carotene(β-Car) aggregate was prepared by self-assembly in cetyltrimethylammonium bromide (CTAB) micelle. The ground state absorption measurement showed that the aggregate has J-type characteristics and resonance Raman spectra gave the intrinsic explanation of molecular interaction in aggregate. Upon excitation at the optical allowed S2 state of aggregate, direct generation of triplet state via singlet fission(SF) mechanism was observed. Excitation dynamics was elucidated by fs-transient absorption spectroscopy and ns-flash photolysis, respectively. The triplet state life time of aggregate was found to be independent of the ambient oxygen molecules.
      PubDate: 2018-08-01
      DOI: 10.1007/s40242-018-7379-8
      Issue No: Vol. 34, No. 4 (2018)
       
  • Assembly and Post-modification of Fe 3 O 4 @MIL-100(Fe) for Knoevenagel
           Condensation
    • Authors: Yanmei Zhang; Fan Zhang; Xiang Zhang; Yingmei Xu; Xiaohui Qi; Chunshan Quan
      Pages: 655 - 660
      Abstract: Abstract Many efforts have been devoted to the integration of magnetic nanoparticles and metal organic frameworks, which makes it easy and simple to separate the nano-sized metal organic frameworks from liquid phase. Amino-functionalized magnetic metal organic frameworks[Fe3O4@MIL-100(Fe)-NH2] were prepared by a stepwise assembly method followed by post-modification with electron-rich reagent. This magnetic catalyst was characterized by means of X-ray diffraction(XRD), transmission electron microscopy(TEM), scanning electron microscopy(SEM) and nitrogen adsorption, and tested in Knoevenagel condensation as a base catalyst. The magnetic catalyst exhibits a core-shell structure and can afford a high activity for the Knoevenagel condensation due to its bifunctional property and reduced diffusion limitation. Furthermore, it could be recovered magnetically and recycled three times. Although activity loss was observed in the recycle experiments, it could be reactivated by dispersing in a fresh modifier solution.
      PubDate: 2018-08-01
      DOI: 10.1007/s40242-018-7361-5
      Issue No: Vol. 34, No. 4 (2018)
       
  • Synthesis and Properties of PGS-Li Scaffold
    • Authors: Zhihui Liu; Yadong Lu; Wei Feng; Junxing Yang; Shang Gao; Lijie Song; Yao Wang; Bowei Wang
      Pages: 670 - 675
      Abstract: Abstract Lithium ion-doped polyglycerol sebacate scaffold(PGS)-Li was synthesized by adding lithium ions to polyglycerol sebacate(PGS) during its crosslinking process due to the specific effects of lithium ions on periodontal ligament cells, cementoblasts and the eminent performance of PGS. The molecular mass, composition, structure, porosity, thermal properties, and hydrophilicity of the composite were characterized by gel permeation chromatography(GPC), Fourier transform infrared spectroscopy(FTIR), inductively coupled plasma optical emission spectrometer(ICP-OES), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), thermogravimetric analyzer(TGA) and contact angle measurments, and the degradation of the material was evaluated by in vitro degradation experiments. The biological activity of PGS-Li scaffold was detected by calcein-AM staining and cytotoxicity test. The results indicate that PGS-Li scaffold has been successfully synthesized, which has similar composition and structure to PGS, but slightly larger molecular weight. In addition, the porosity and pore size of PGS-Li scaffold basically meet the requirements of engineering scaffold materials and the seaffold shows better performance in terms of hydrophilicity and thermal stability than PGS. In vitro degradation experimental results show that the degradation rate of PGS-Li scaffold is higher than that of PGS. What’s more, the results of cytotoxicity test and cell staining show that there is no significant difference in the proliferation and cell morphology of cementoblasts.
      PubDate: 2018-08-01
      DOI: 10.1007/s40242-018-8164-4
      Issue No: Vol. 34, No. 4 (2018)
       
  • Crystal Structure and Photoluminescence Properties of Two Barium(II) MOFs
    • Abstract: Abstract In this article, two Ba(II) metal-organic frameworks(MOFs), {[Ba(BPS)(H2O)2]·H2O}n(1) and [Ba(BPS)(H2O)2]n(2)(H2BPS=4,4′-bibenzoic acid-2,2′-sulfone), were synthesized and characterized. X-Ray crystal structural analyses reveal that compounds 1 and 2 have different structures, which is probably related to different coordination modes of ligand in compounds 1 and 2. It is remarkable that compounds 1 and 2 both show excellent thermal stability. The solid-state emission spectra reveal that compounds 1 and 2 both present strong luminescence emission bands at room temperature.
      PubDate: 2018-08-17
       
  • Formation of Oxygen Vacancies on the {010} Facets of BiOCl and Visible
           Light Activity for Degradation of Ciprofloxacin
    • Authors: Xiaoxing Zeng; Xiaofeng Gong; Yiqun Wan; Ruyang He; Zhaodi Xu
      Abstract: Abstract BiOCl nanosheets with oxygen vacancies on the exposed {010} facets were assistant-synthesized by triethanolamine(TEOA) via hydrothermal method. We explored the surface properties, crystal structure, morphology and optical absorption ability of the prepared samples via various characterization technologies. The results indicate that the morphologies and microstructures of the obtained samples depend on the amount of TEOA in the synthesis. The addition of TEOA induces the production of oxygen vacancy on the surface of the samples. Therefore, the synthesized samples with TEOA-assistance hold higher photoactivity for the degradation of colorless antibiotic agent Ciprofloxacin(CIP) under visible light(λ≥420 nm). The obtained sample upon the addition of 20 mL of TEOA exhibits the highest photocatalytic performance, which is nearly 14 times as high as that of the sample prepared without TEOA and twice as high as that of the prepared samples with NaOH or NH3·H2O. The possible degradation mechanism was discussed on the basis of the experiment results.
      PubDate: 2018-08-13
      DOI: 10.1007/s40242-018-8035-z
       
  • A Simple, Low-cost Method to Fabricate Drag-reducing Coatings on a
           Macroscopic Model Ship
    • Authors: Zhipeng Wang; Songsong Zhang; Shan Gao; Xiao Ouyang; Jie Li; Rui Li; Hao Wei; Zhijun Shuai; Wanyou Li; Shanshan Lyu
      Abstract: Abstract A low-cost method was used to fabricate superhydrophobic coatings on a macroscopic ship model and the drag-reducing effect was investigated at both low and high speed. Hierarchical structures of the superhydrophobic copper coatings were characterized by means of scanning electron microscopy(SEM) and X-ray diffraction(XRD). Drag coefficient tests on surfaces with different wettability(superhydrophilic, hydrophilic, hydrophobic and superhydrophobic surfaces) showed that the as-prepared superhydrophobic surface exhibited a high remarkable drag reduction of 81% at a low speed of 1 mm/s. In the drag-reducing tests with ship models, the superhydrophobic coatings also exhibited around 16% drag reduction at a velocity of 0.3 m/s.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-8032-2
       
  • Synthesis of 9-Substituted Berberine Derivatives with Microwave
           Irradiation
    • Authors: Xie Han; Kaiyuan Shao; Wenxiang Hu
      Abstract: Abstract Hyperglycemia is frequently accompanying with hyperlipidemia. To explore the potent drugs with dual-activity and dual-site effects that could reduce blood glucose and blood lipid at the same time, fibrate group with lipid-lowering effect on the 9th position of berberine(BBR) was introduced using the drug design combination principle and the multi-target collaborative treatment method. Moreover, the molecular structure of BBR was modified, and six 9-substituted derivatives of BBR were designed and synthesized, among which, five compounds have never been reported before. In addition, the molecular structures of these derivatives were identified using liquid chromatography-mass spectrometry(LC-MS), 1H nuclear magnetic resonance(1H NMR) and 13C NMR, respectively. Further-more, the microwave irradiation experimental technique was applied in the synthesis reaction using the novel microwave synthesizer, which accelerated the reaction rate, enhanced the reaction yield, reduced the reaction by-products, and simplified the post-processing steps. In the meantime, the 9-position regioselective demethylation of BBR was explored through quantum chemical calculation during the synthesis of berberrubine. The computations were consistent with the experimental results, which contributed to deducing the mechanism of its selective methylation.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-7425-6
       
  • Light-stimulus Dual-drug Responsive Nanoparticles for Photoactivated
           Therapy Using Mesoporous Silica Nanospheres
    • Authors: Peng Wu; Dongfang Zhou; Yubin Huang; Jizhen Li
      Abstract: Abstract Photoactivated therapy is an exciting new method of cancer treatment. A new light-stimulus dual-drug responsive nanoparticles based on mesoporous silica nanoparticles(MSN) were developed to control cellular anticancer drug release. The prepared Curcumin(Cur)-loaded nanoparticles MSN-Pt-PEG@Cur[PEG=poly(ethylene glycol)] could be activated by photostimulation to generate reactive oxygen species(ROS) from Cur and Pt(II) from Pt(IV), respectively. Compared with free anti-cancer drugs’ chemotherapy and single photoactivated therapy, the prepared MSN-Pt-PEG@Cur displayed increased cytotoxicity. Therefore, the strategy of light-stimulus dual-drug responsive nanoparticles is a promising approach to photoactivated therapy.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-8077-2
       
  • Metabonomics and Molecular Biology-based Effects of Sugemule-3 in an
           Isoproterenol-induced Cardiovascular Disease Rat Model
    • Authors: Xiye Wang; Yu Wang; Chengxi Wei; Lijun Yu
      Abstract: Abstract Cardiovascular disease(CVD) is a common and serious disease in the elderly, which has characteristically high prevalence, disability, and mortality rates. However, the etiology of CVD is still not very clear. The traditional Mongolian medicine Sugemule-3(SM) is usually used for the treatment of CVD and exhibits a good curative effect. In this study, a serum metabolite profile analysis was used to identify potential biomarkers associated with isoproterenol(ISO)-induced CVD and investigate the mechanism of the action of SM. Ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS) was used for the metabonomics analysis. Principal component analysis(PCA) was used to process the acquired data to differentiate the results of the control, CVD, and SM treatment groups. Orthogonal partial least squares discriminant analysis(OPLS-DA) enabled the identification of 21 metabolites as potential biomarkers that were relevant to phospholipid and energy metabolism. The results indicate that SM played a protective role against ISO-induced CVD in rats by regulating phospholipid and energy metabolic pathways. Further, we verified the apoptotic metabolic pathway using molecular biology methods, such as terminal deoxynucleotidyl transferase(TdT) deoxyuridine 5′-triphosphate(dUTP) nick-end labeling(TUNEL) assay and Western blot analysis. Furthermore, this study identified early biomarkers of CVD and elucidated the underlying mechanism of the therapeutic actions of SM, which is worth further to be investigated for development as a clinical therapy.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-7307-y
       
  • Removal of Chromium(VI) from Groundwater Using Oil Shale Ash Supported
           Nanoscaled Zero-valent Iron
    • Authors: Jian Cui; Ende Wang; Zhimin Hou; Rui Zhou; Xinqian Jiao
      Abstract: Abstract Oil shale ash(OSA) supported nanoscaled zero-valent iron(OSA-nZVI) was used as a rapid and efficient reductant for Cr(VI) reduction. The optimal mass ratio of nZVI to OSA and the optimal dosage were explored. The effects of initial pH, reaction temperature, initial Cr(VI) concentration, and common cations and anions in ground-water on Cr(VI) reduction were determined in batch experiments. The results show that the optimum initial pH is 5.0. The reaction temperature has a positive effect on Cr(VI) reduction while the real groundwater has a negative effect. Additionally, 84.22% Cr(VI) was still reduced by 3 g/L OSA-nZVI(1:2)(mass ratio of OSA to Fe0 was 1:2) within 120 min for 50 mg/L Cr(VI) under conditions of 10 ºC and unadjusted pH.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-8104-3
       
  • Development of a Two-photon Ratiometric Fluorescent Probe for Glutathione
           and Its Applications in Living Cells
    • Authors: Gaoping Xu; Yonghe Tang; Weiying Lin
      Abstract: Abstract Glutathione(GSH), as the most abundant intracellular biothiol, plays an important role in the redox homeostasis of the organism. Abnormal concentrations of GSH in cells may lead to many malignant diseases, such as cancer, liver damage and neurodegenerative diseases. It is urgent to develop effective methods to detect GSH in living organisms. In this work, a new two-photon ratiometric fluorescent probe Co-GSH based on the coumarin-chalcone dye platform was judiciously developed. Based on the Michael-addition reaction, Co-GSH was able to identify GSH with high selectivity and sensitivity. Furthermore, assisted by laser-scanning confocal microscopy, Co-GSH could specifically response GSH over the other biothiols, including Cys and Hcy, in living HeLa cells by using one- and two-photon moods.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-8089-y
       
  • Structure of a Mixture of Graphene Plates and Ionic Liquid
           1-Octyl-3-methylimidazolium Hexafluoroborate
    • Authors: Siyan Chen; Zhenhai Gao
      Abstract: Abstract We reported a molecular dynamics simulation study of a mixture of 1-octyl-3-methylimidazolium hexafluoroborate([C8MIN]+[PF6]‒), an ionic liquid, and pristine graphene. Our simulations were performed under various conditions, including several temperatures and distances between graphene plates. By studying the liquid structure of the ionic-liquid graphene mixture, we found that the transition for the ionic liquids entering the middle of two graphene plates should occur within 1.00 and 1.50 nm in the temperature range studied(300―600 K). We also studied the pair correlations between the graphene plates and the head and tail of the cation and the anion. Our study at the molecular level can aid in understanding the detailed molecular structure of the mixture.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-8109-y
       
  • Preparation and Properties of Magnetic-fluorescent Microporous Polymer
           Microspheres
    • Authors: Xiaohu Zou; Zhizhi Wei; Jing Du; Xiaotao Wang; Gaowen Zhang
      Abstract: Abstract Microporous microspheres can be used as functional nanomaterial carriers for their microporous structure and higher specific surface area. In this study, magnetic fluorescent polymer microspheres were prepared by incorpo-rating Fe3O4 nanoparticles and CdSe/ZnS quantum dots(QDs) into hyper-crosslinked microporous polymer micro-spheres(HCMPs) via the in situ coprecipitation method and swelling-diffusion. The HCMPs predominantly have mi-cropores, and their specific surface area is as high as 703.4 m2/g. The magnetic-fluorescent microspheres maintain the superparamagnetic behavior of Fe3O4, and the saturation magnetization reaches 38.6 emu/g. Moreover, the composite microspheres exhibit an intense emission peak at 530 nm and achieve good fluorescence.
      PubDate: 2018-07-11
      DOI: 10.1007/s40242-018-7413-x
       
  • Heterostructure Ag@WO 3–x Composites with High Selectivity for
           Breaking Azo-bond
    • Authors: Zhenxing Fang; Yan Chen; Boran Wang; Shihui Jiao; Guangsheng Pang
      Abstract: Abstract The heterostructure Ag@WO3–x(x=0.1 or 1) composites with high selectivity for breaking azo-bond were obtained by in situ reduction of Ag2WO4. The crystal structure and morphology of Ag@WO3–x were characterized by X-ray powder diffraction(XRD), scanning electron microscope(SEM) and transmission electron microscope(TEM). The residue solution of methyl orange(MO) after degradation was tested by gas chromatograph mass spectrometer (GCMS) to analyze the exact components. The results indicate that the products after degradation are N,N-dimethylaniline, N,N-dimethyl-p-phenylenediamine and sulfanilic acid. This is caused by specific breaking of azo-bond in MO. The azo-bond breaking of MO by Ag@WO3–x could occur in dark without any light illumination. Therefore, we proposed a possible mechanism for this azo-bond breaking reaction based on the reaction condition and results.
      PubDate: 2018-07-07
      DOI: 10.1007/s40242-018-8095-0
       
  • Effects of Annealing Temperature on Microstructure and Electrochemical
           Properties of Perovskite-type Oxide LaFeO 3 as Negative Electrode for
           Metal Hydride/Nickel(MH/Ni) Batteries
    • Authors: Shuqin Yang; Yuan Li; Yongjie Yuan; Zhentao Dong; Kailiang Ren; Yumeng Zhao
      Abstract: Abstract We reported the effects of annealing temperatures on microstructure and electrochemical properties of perovskite-type oxide LaFeO3 prepared by stearic acid combustion method. X-Ray diffraction(XRD) patterns show that the annealed LaFeO3 powder has orthorhombic structure. Scanning electron microscopy(SEM) and transmission electron microscopy(TEM) images show the presence of homogeneously dispersed, less aggregated, and small crystals(30―40 nm) at annealing temperatures of 500 and 600 °C. However, as the annealing temperature was increased to 700 and 800 °C, the crystals began to combine with each other and grew into further larger crystals(90―100 nm). The electrochemical performance of the annealed oxides was measured at 60 °C using chronopotentiometry, potentiodynamic polarization, and cyclic voltammetry. As the annealing temperature increased, the discharge capacity and anti-corrosion ability of the oxide electrode first increased and then decreased, reaching the optimum values at 600 °C, with a maximum discharge capacity of 563 mA·h/g. The better electrochemical performance of LaFeO3 annealed at 600 °C could be ascribed to their smaller and more homogeneous crystals.
      PubDate: 2018-07-07
      DOI: 10.1007/s40242-018-8079-0
       
  • A Novel Nano-sized Catalyst CeO 2 -CuO/Hollow ZSM-5 for NO x Reduction
           with NH 3
    • Authors: Ting Yi; Jingwei Li; Yibo Zhang; Xiangguang Yang
      Abstract: Abstract Hollow-ZSM-5 was synthesized by a traditional hydrothermal method without alcohol, and a novel na-no-sized Ce-Cu/hollow ZSM-5 sample was prepared by conventional incipient wetness impreganation. The catalysts were characterized by TEM, SEM, XRD, NMR and N2 adsorption-desorption. The results indicate that the hol-low-ZSM-5 has a good MFI structure with large surface area. The synthesized CeO2-CuO/hollow ZSM-5 showed an excellent catalytic activity for NOx conversion(90% NOx conversion were obtained) in the temperature range of 340–550 °C under GHSV=480000 mL·g‒1·h‒1 due to its appropriate redox ability and acidity.
      PubDate: 2018-07-07
      DOI: 10.1007/s40242-018-7333-9
       
  • Synthesis of Polycarbonate Diols(PCDLs) via Two-step Process Using CH 3
           COONa as an Effective Catalyst
    • Authors: Menglu Song; Xiangui Yang; Gongying Wang
      Abstract: Abstract Polycarbonate diols(PCDLs) with a number average molecular weight(Mn) of 2800 and a narrow polydispersity index(PDI=1.33) were synthesized from dimethyl carbonate(DMC) and 1,4-butanediol(BD) via a two-step process. The influences of the molar ratios of DMC to BD in the feedstock, polycondensation temperature and polycondensation time on the PCDLs preparation were studied. CH3COONa showed the best catalytic performance among the catalysts studied. The highest BD conversion of 73.8% and PCDLs yield of 64.7% were achieved under its optimum reaction conditions. Furthermore, based on the results of 1H NMR, the relationships between the ratio of end groups (—OCH3/—OH) of oligomers, the Mn and chain-end constitute of resultant polycarbonates were also investigated. The results indicate that PCDLs can be synthesized when the oligomers mostly bear hydroxyl end groups. In contrast, it was impossible to prepare PCDLs when the oligomers were enriched with methyl carbonate end groups.
      PubDate: 2018-07-07
      DOI: 10.1007/s40242-018-7390-0
       
  • Preparation and Characterization of SiO 2 /Co and C/Co Nanocomposites as
           Fisher-Tropsch Catalysts for CO 2 Hydrogenation
    • Authors: Fuqin Han; Zhe Zhang; Na Niu; Jian Li
      Abstract: Abstract To fabricate high-density cobalt-based catalysts, we first synthesized SiO2/C composites via a hydrothermal method and removed C and SiO2 by two different methods, respectively. The as-prepared SiO2 and C supports then reacted with cobalt acetylacetonate and N,N-dimethylformamide(DMF) under hydrothermal conditions to prepare SiO2/Co and C/Co nanocomposite catalysts. The catalysts were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM), transmission electron microscopy(TEM), inductively coupled plasma mass spectrometry(ICP), energy dispersive X-ray fluoresence spectrometer(EDX), and nitrogen adsorption. It was found that hexagonal cobalt nanocrystals were successfully integrated with the mesoporous silica or carbon nanotube supports. SEM and TEM results show that SiO2/Co composites with a hollow/mesoporous sphere structure and C/Co composites with a tubular structure have been successfully synthesized. Both composite samples show superpara-magnetism exhibiting an S-type hysteresis loop, which originated from the cobalt nanoparticles in the samples. Nitrogen adsorption/desorption curves suggest that the SiO2 and C supports have well-developed pore structures and large specific surface areas, and the loading and good dispersity of cobalt nanoparticles on the supports were proven by ICP and EDX. Moreover, the samples exhibited good and stable catalytic activity, demonstrating that the two composites are suitable catalysts for Fischer-Tropsch CO2 hydrogenation.
      PubDate: 2018-07-07
      DOI: 10.1007/s40242-018-7381-1
       
 
 
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