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  Subjects -> CHEMISTRY (Total: 852 journals)
    - ANALYTICAL CHEMISTRY (52 journals)
    - CHEMISTRY (598 journals)
    - CRYSTALLOGRAPHY (21 journals)
    - ELECTROCHEMISTRY (25 journals)
    - INORGANIC CHEMISTRY (41 journals)
    - ORGANIC CHEMISTRY (46 journals)
    - PHYSICAL CHEMISTRY (69 journals)

CHEMISTRY (598 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 10)
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: 38)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 18)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 24)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 39)
ACS Nano     Full-text available via subscription   (Followers: 252)
ACS Photonics     Full-text available via subscription   (Followers: 12)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 23)
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 Chimica Slovenica     Open Access  
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: 8)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 5)
Advanced Functional Materials     Hybrid Journal   (Followers: 51)
Advanced Science Focus     Free   (Followers: 3)
Advances in Chemical Engineering and Science     Open Access   (Followers: 57)
Advances in Chemical Science     Open Access   (Followers: 13)
Advances in Chemistry     Open Access   (Followers: 15)
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: 16)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 21)
Advances in Nanoparticles     Open Access   (Followers: 15)
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: 20)
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)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
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: 66)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 15)
American Journal of Chemistry     Open Access   (Followers: 27)
American Journal of Plant Physiology     Open Access   (Followers: 14)
American Mineralogist     Hybrid Journal   (Followers: 14)
Analyst     Full-text available via subscription   (Followers: 39)
Angewandte Chemie     Hybrid Journal   (Followers: 179)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 231)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 4)
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: 8)
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: 16)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal   (Followers: 1)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
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: 4)
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: 324)
Biochemistry Insights     Open Access   (Followers: 6)
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: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 120)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 84)
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: 3)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 5)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 68)
Catalysis for Sustainable Energy     Open Access   (Followers: 7)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 7)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 8)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 5)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 15)
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: 25)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 21)
Chemical Reviews     Full-text available via subscription   (Followers: 185)
Chemical Science     Open Access   (Followers: 22)
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: 56)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 24)
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: 147)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 15)
Chemistry and Materials Research     Open Access   (Followers: 20)
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: 42)
Chemistry of Materials     Full-text available via subscription   (Followers: 250)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 22)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 2)
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: 10)
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: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 19)
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: 11)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 3)
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: 5)
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 Metabolomics     Hybrid Journal   (Followers: 5)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 18)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 64)
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  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 4)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 3)
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  

        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  [2355 journals]
  • Synthesis and antibacterial activity of oxazolidinone derivatives
           containing nitro heteroaromatic moiety
    • Authors: Boxuan Xu; Xiudong Ding; Yachuang Wu; Lei Cui; Ping Qian; Di Wang; Yanfang Zhao
      Abstract: Abstract A series of novel oxazolidinone derivatives containing nitro heteroaromatic moiety was synthesized and characterized by means of 1H NMR and MS spectra. All target compounds were evaluated for their in vitro antibac-terial activities against S.au 29213, methicillin-resistant staphylococcus aureus(MRSA) and vancomycin-resistant enterococcus(VRE) by minimum inhibitory concentration(MIC) assay. Most of them exhibited antibacterial activity against S.au 29213, MRSA and VRE. Among them, compounds 10e and 10f displayed better activity than the control.
      PubDate: 2018-01-09
      DOI: 10.1007/s40242-018-7302-3
       
  • Design, synthesis and biological evaluation of novel selective thiol-based
           histone deacetylase(HDAC) VI inhibitors bearing indeno[1,2-c]pyrazole or
           benzoindazole scaffold
    • Authors: Qihao Xu; Shujia Yu; Yijun Cai; Jinyu Yang; Linxiang Zhao; Dan Liu
      Abstract: Abstract A series of thiol-based indeno[1,2-c]pyrazoles and benzoindazole compounds was designed and synthesized according to the structural specificity of histone deacetylase VI(HDAC6) and the structural characteristics of HDAC inhibitors. The inhibitory activities of the target compounds against HDAC6 and HDAC1 were screened by fluorescence analysis. Most of the target compounds showed moderate inhibitory activity against HDAC6(IC50=44—598 nmol/L). Among them, compound A-4 displayed the highest selectivity against HDAC6 and similar inhibitory activity(IC50=44 nmol/L) to that of the positive drug SAHA(IC50=41 nmol/L) against HDAC6.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7239-6
       
  • Template effect of hydrophobically associating polymers on the
           construction of cuprous oxide micro structure
    • Authors: Lei Dong; Huan Liu; Yanjuan Li; Hongtao Zhang; Liangmin Yu; Lanni Jia
      Abstract: Abstract To determine the template effect of hydrophobically associating copolymers(HACPs) on the morphology of nano/micro structures, six HACPs were synthesized and used as templates to biomimetically synthesize cuprous oxide(Cu2O), an important semiconductor. This experiment showed a clear relationship between the associating state of the HACP molecules and the morphology of the Cu2O particles. Cu2O hollow spheres were preferentially prepared when the HACP molecules were in an intramolecular associating state. Furthermore, a Cu2O hexapod was easily ob-tained when the HACP molecules were in an intermolecular associating state. The morphologies of the Cu2O crystals prepared in the presence of the HACPs also confirmed this result.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7173-7
       
  • Electrochemical behaviour of magnesium(II) on Ni electrode in LiCl-KCl
           eutectic
    • Authors: Shanshan Wang; Wei Han; Milin Zhang; Mei Li; Xiaoguang Yang; Yang Sun
      Abstract: Abstract The electrochemical behaviour of magnesium(II) and the formation mechanism of Mg-Ni alloys on Ni electrode were studied in LiCl-KCl eutectic using various electrochemical techniques. Cyclic voltammogram and square-wave voltammogram revealed that under-potential deposition of magnesium occurred on Ni electrode because Mg-Ni alloy compounds were formed. The thermodynamic properties of the Mg-Ni intermetallics, Mg2Ni and MgNi2, were determined using open circuit chronopotentiometry in the temperature range of 818―893 K. Moreover, the Mg-Ni alloys were produced by potentiostatic and galvanostatic electrolysis under different conditions and charac-terized by means of scanning electron microscopy(SEM) equipped with energy dispersive spectrometry(EDS) and X-ray diffraction(XRD). The experimental results indicate that Mg-Ni intermetallic compounds can be selectively produced by potentiostatic electrolysis.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7227-x
       
  • Studies on new steroidal saponins from Allii macrostemonis bulbus and
           their antitumor activities
    • Authors: Hua Yao; Tong Wang; Qian Wu; Ying Liu; Peng Li; Xuwen Li; Yongri Jin
      Abstract: Abstract Two new steroidal saponins(2, 3) and two known compounds(1, 4) were isolated from 75% ethanol extract of Allii macrostemonis bulbus by various spectral methods. The two new steroidal saponins were respectively elucidated as (25S)-26-O-β-D-glucopyranosyl-5α-furostanol-2α,3β,22,26-tetrol-3-O0-β-D-glucopyranosyl(1→2)-[β-D-glucopyranosyl(1→3)]-β-D-glucopyranosyl(1→4)-β-D-galactopyranoside(2) and 26-O-β-D-glucopyranosyl-5α-furostanol-25(27)-ene-3β,22,26-tetrol-3-O-β-D-glucopyranosyl(1→2)-[β-D-glucopyranosyl(1→3)]-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside(3). Compound 4 was obtained from this medical plant for the first time. The activity experiments of proliferation inhibition on tumor cells were performed by cell counting kit-8(CCK-8) method for compound 2(25S-configuration) and its isomer(compound 1, 25R-configuration). The results show that compounds 1 and 2 have weak inhibition on lung cancer A549 cells, melanoma A375 cells and breast cancer MCF-7 cells as well as certain inhibitory effect on liver cancer HepG2 cells, and the inhibitory effect of compound 1 is stronger than that of compound 2.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7213-3
       
  • Synthesis, in vitro coagulation activities and molecular docking studies
           on three L -histidine amide derivatives
    • Authors: Wei He; Anran Zhao; Jiajia Zou; Xuan Luo; Xiao Lin; Lisheng Wang; Cuiwu Lin
      Abstract: Abstract Three novel L-histidine amide derivatives were synthesized and the corresponding chemical structures were characterized by means of melting point analysis, IR, MS, 1H NMR as well as 13C NMR. The coagulation activities of the compounds were evaluated by an MOE(molecular operating environment) docking technique and coagulation test. The results obtained from molecular docking show that the interactions between the compounds and thrombin exhibit procoagulant activity in combination with an improved combinatory effect. Moreover, the results of in vitro coagulation tests show that the L-histidine amide derivatives feature coagulant activities in common coagulation pathways. Compared with the blank control group, the optimal shortening rates of compounds 1―3 were 39.08%(0.5 mmol/L), 22.94%(1.0 mmol/L) and 15.38%(0.0625 mmol/L), respectively.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7184-4
       
  • Development of BCPDA-Eu 3+ -BAS labeled hepatitis B surface antibodies
    • Authors: Wenjia Tan; Zhixia Sun; Lili Xuan; Junling Li; Wenbing Xie; Chengyan He; Lihua Pan
      Abstract: Abstract The effect of the chelating agent 4,7-bis(chlorosulfophenyl)-1,10-phenanthroline-2,9-dicarboxylic acid (BCPDA) labeled hepatitis B surface antibodies(HBsAb) on time-resolved fluoroimmunoassays(TRFIA) was investigated. The labeling detection method was established. The biotin-streptavidin(BAS) system was introduced, and the multi-stage amplification effect of the BAS system was analyzed. It is found that the BCPDA-Eu3+-HBsAb-BAS fluorescent marker can emit strong fluorescence. Compared to BCPDA-Eu3+-HBsAb, BCPDA-Eu3+-HBsAb-BAS demonstrates an enhanced fluorescence intensity by over 10 times. This study provides a guidance for the next generation non-radio immunoassays in clinical diagnosis.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7295-y
       
  • Bioremediation process and bioremoval mechanism of heavy metal ions in
           acidic mine drainage
    • Authors: Ying Zhao; Zhijing Fu; Xiaofei Chen; Guoyan Zhang
      Abstract: Abstract Acidic mine drainage(AMD) containing acidity and a broad range of heavy metal ions is classified as hazardous, and must be properly treated. The removal mechanism of heavy metal ions in acidic mine drainage containing Cu2+, Fe2+, and Zn2+ with biological method was studied here. Using 20 mmol/L ethanol as carbon source, Desulfovibrio marrakechensis, one of sulfate reducing bacteria(SRB) species, grew best at 35 °C and pH=6.72 with concentrations of 10, 55 and 32 mg/L for Cu2+, Fe2+ and Zn2+, respectively. The removal efficiency for each ion mentioned above was 99.99%, 87.64% and 99.88%, respectively. The mineralogy and surface chemistry of precipitates were studied by means of energy dispersive spectrometer(EDS), X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD) combined with control tests. The experimental results demonstrate that the removal mechanism of heavy metal ions by Desulfovibrio marrakechensis is comprehensive function of chemical precipitation, adsorption and bioprecipitation. The biogenic iron sulfide solid was characterized as greigite(Fe3S4), while the zinc sulfide solid was characterized as sphalerite(ZnS).
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7255-6
       
  • Pressure-sensitive transistor fabricated from an organic semiconductor
           1,1′-dibutyl-4,4′-bipyridinium diiodide
    • Authors: Xianwei Fu; Yang Liu; Zhi Liu; Ning Dong; Tianyu Zhao; Dan Zhao; Gang Lian; Qilong Wang; Deliang Cui
      Abstract: Abstract Although organic semiconductors have attracted extensive interest and been utilized to fabricate a variety of optoelectronic devices, their electrical transportation characteristics under high pressure have rarely been investigated. However, the weak intermolecular interaction of organic semiconductors endows them with a pressure-sensitive crystal structure and electrical transportation performance, especially the latter. Herein, a new pressure-sensitive transistor was fabricated from an organic semiconductor 1,1'-dibutyl-4,4′-bipyridinium diiodide. It was found that this transistor exhibited increasing resistance as the pressure gradually increased and that it eventually shut off under a pressure of 288 MPa. Such a characteristic makes this organic semiconductor a potential candidate for the use in the fabrication of pressure-sensitive switches and regulators. In addition, these results shed light on the electrical performance of flexible organic optoelectronic devices working under high pressure levels resulted from the bending force.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7297-9
       
  • Easily separated and recyclable amino-functionalized porous SiO 2 beads
           with 3D continuous meso/macropore channels
    • Authors: Qi Wang; Xiaohui Yang; Yanqiu Jiang; Hang Huo; Defeng Li; Kaifeng Lin; Xianzhu Xu
      Abstract: Abstract Amino-functionalized porous SiO2 beads with a diameter of 200—800 μm(PSB-NH2) have been success-fully synthesized by grafting 3-aminopropyl-triethoxysilane onto meso/macroporous silica beads(PSB), in which the PSB was prepared by hydrothermal synthetic method with a porous hard template anion-exchange resin. The as-prepared materials were characterized by means of nitrogen sorption and transmission electron micrographs(TEM), showing the presence of 3D interconnected and continuous large mesopores and macropores inside. The beads were used to catalyze Knoevenagel condensation and proved to be highly active and selective due to the high accessibility of the reactants to the amino groups via the continuous 3D meso/macopores. Notably, such material in bead format facilitates the extremely straightforward separation from reaction solution without any centrifugation or filtration. Moreover, PSB-NH2 proved to be a stable catalyst via leaching experiment test, and can be easily recovered and reused without significant loss of activity in successive catalytic cycles.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7208-0
       
  • A comparative toxicity study of TiO 2 nanoparticles in suspension and
           adherent culture under the dark condition
    • Authors: Like Chen; Miao Liu; Su Leng; Zhuan Li
      Abstract: Abstract The present study focused on the different acute toxicity of TiO2 nanoparticles(TiO2 NPs) towards the bacteria in suspension culture and adherent culture under the dark conditions. The study investigated the bacteria toxicity with TiO2 NPs at different concentrations(1—2000 mg/L), sizes(10 nm, 35 nm) and specific surface areas in unit volume solution(0—224 m2/L) characterized by the cell viability, extracellular polymeric substances(EPS) release and biofilm formation. The bacteria in adherent culture was found to be more resistant against the toxicity of TiO2 NPs compared to that in suspension culture. An NP dose and surface area dependent(rather than the size) bacterial viability was observed in suspension culture, specifically the surface area positively correlated with the toxicity of TiO2 NPs. The size of TiO2 NPs, however, played a more critical role in toxicity of TiO2 NPs in adherent culture. Therefore, the surface area dependent toxicity of TiO2 NPs is a comprehensive parameter describing the dose and size dependent toxicity of TiO2 NPs. The electron microscopic(SEM, TEM, EDX) observations suggested the EPS release and biofilm formation, during aggregation of TiO2 NPs on the bacteria after 12 h cultivation in adherent culture under the dark condition. A possible toxic mechanism could be that “effective surface areas” that directly contact with the bacterial membrane greatly contributed to the toxicity of TiO2 NPs in both suspension culture and adherent culture. Therefore, as for the possible resistance mechanism, EPS secretion and subsequent biofilm formation may protect the bacteria against the toxicity of TiO2 NPs.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7193-3
       
  • Emissive mononuclear Cu(I) triphenylphosphine complexes with
           functionalized 6- tert -butoxycarbonyl-2,2′-bipyridine
    • Authors: Yansheng Luo; Xuehua Zeng; Wanman Wang; Jinglin Chen; Lihua He; Mengli Zhang; Suijun Liu; Herui Wen
      Abstract: Abstract Two new emissive mononuclear copper(I) triphenylphosphine complexes with functionalized 6-tert-butoxycarbonyl-2,2′-bipyridine chelating ligands were prepared and characterized. Each Cu(I) cation has a markedly distorted P2N2 tetrahedral array with two different Cu—N bond distances, due to the addition of the bulky tert-butoxycarbonyl group at the 6-position of the 2,2′-bipyridyl ring. A weak low-energy broad absorption band appears at 330—500 nm in their CH2Cl2 solutions, which is influenced by the methylation of the 2,2′-bipyridyl ring. At room temperature, the photoluminescence can be clearly observed both in degassed CH2Cl2 solution and in the solid state, because of the introduction of the bulky tert-butoxycarbonyl substituent, and the emission properties are remarkably affected by both the methylation and the alkoxycarbonyl variation of the 2,2′-bipyridyl ring. It is shown that the introduction of the bulky tert-butoxycarbonyl group is favorable for improving the emission properties of the 6-alkoxycarbonyl-2,2′-bipyridine-based cuprous complexes.
      PubDate: 2018-01-05
      DOI: 10.1007/s40242-018-7201-7
       
  • Design and synthesis of novel bispecific molecules for inducing BRD4
           protein degradation
    • Authors: Shihui Wang; Yuming Song; Yue Wang; Yang Gao; Shanshan Yu; Qianqian Zhao; Xiangqun Jin; Haibin Lu
      Abstract: Abstract Proteolysis targeting chimeras(PROTACs) are bispecific molecules containing a target protein binder and an ubiquitin ligase binder connected by a linker. Recently, some heterobifunctional small molecule bromodomain-containing protein 4(BRD4) degraders based on the concept of PROTACs were designed to induce the degradation of BRD4 protein. Herein, we synthesized a new class of PROTAC BRD4 degraders. One of the most promising compound 22f exhibited robust potency of BRD4 inhibition with IC50 value of (9.4±0.6) nmol/L. Furthermore, compound 22f potently inhibited cell proliferation in BRD4-sensitive cell lines RS4;11 with IC50 value of (27.6±1.6) nmol/L and capable of inducing degradation of BRD4 protein at 0.5―1.0 μmol/L in the RS4;11 cells. These data establish that compound 22f is a potent and efficacious BRD4 degrader.
      PubDate: 2018-01-04
      DOI: 10.1007/s40242-018-7272-5
       
  • Gold-catalyzed intermolecular oxidation of phenylacetylene and allylic
           sulfides: an efficient and practical synthesis of α -phenylthio ketone
    • Authors: Renhua Zheng; Qing Huang; Haichang Guo; Yidie Huang; Huajiang Jiang
      Abstract: Abstract An efficient and practical synthesis of α-phenylthio ketone through gold-catalyzed intermolecular oxidation of phenylacetylene and substituted aryl(benzyl) allylic sulfides was developed. The reaction scope is fairly good with substituted aryl(benzyl) allylic sulfides, tolerating various functional groups, and the reaction affords the yields of 63%—85%.
      PubDate: 2018-01-04
      DOI: 10.1007/s40242-018-7238-7
       
  • Wang resin-supported enantioselective catalysts for the asymmetric Michael
           additions of acetone to β -nitroolefins
    • Authors: Yuhan Su; Xuefei Qi; Jun Tian; Chenhui Lin; Ligong Chen; Yang Li; Yuehua Jin; Xilong Yan; Bowei Wang
      Abstract: Abstract Two Wang resin-supported (1R,2R)-(+)-1,2-DPEN(DPEN=diphenylthylenediamine) catalysts were synthesized from cyanuric chloride and trimesoyl chloride, respectively. These two catalysts were characterized by FTIR, TGA and elemental analysis. The results demonstrated that (1R,2R)-(+)-1,2-DPEN was successfully bonded to the surface of Wang resin through the amido linkage. Subsequently, the asymmetric Michael addition of acetone to β-nitrostyrene was employed to evaluate their catalytic performance. It was found that the catalyst generated from trimesoyl chloride exhibited much better catalytic behavior than our previously reported catalyst, likely attributed to the multiple hydrogen-bond interaction between β-nitrostyrene and amide group, which made the catalytic transition intermediates more stable. Under the optimal conditions, 76.1% β-nitrostyrene conversion and 93.8% enantioselectivity were obtained. Finally, the generality of this catalyst was examined with Michael additions of acetone to β-nitroolefins and excellent enantioselectivities(91.9% to 99.9%) were achieved.
      PubDate: 2018-01-04
      DOI: 10.1007/s40242-018-7189-z
       
  • Synthesis and characterization of [Cu(N-MeIm) 4 (BF 4 ) 2 ] in ionic
           liquid
    • Authors: Jingyang Wang; Meng Zhang; Xiaodong Xu; Jing Feng; Yanli Wang; Milin Zhang; Wei Han; Yitung Chen; Guoxin Tian
      Abstract: Abstract A new transition metal complex, [Cu(N-MeIm)4(BF4)2](N-MeIm=N-methylated imidazoles, BF4= tetrafluoroborate), was synthesized via the solvothermal method in ionic liquid. The ionic liquid acts as thermal decomposition reaction medium, soft temple agent and ligand compound. The central Cu(II) ion is coordinated by four N atoms from four N-methylated imidazole ligands, and the four N-methylated imidazole rings are perpendicular to each other. The crystal structure of [Cu(N-MeIm)4(BF4)2] was determined by single crystal X-ray diffraction. The results of thermogravimetry(TG) and Fourier transform infrared spectrometry(FTIR) analyses were in accordance with that of crystal structure. The complex showed strong ligand-based absorbance with maximum wavelength at 208 and 231 nm, which are attributed to π-π* transition of the N-methylated imidazole ligands.
      PubDate: 2018-01-04
      DOI: 10.1007/s40242-018-7259-2
       
  • Phase behavior of ionic liquids-cesium carbonate-water aqueous two-phase
           systems and their extraction of L -tryptophan
    • Authors: Shuang Li; Shuni Li; Quanguo Zhai; Yucheng Jiang; Mancheng Hu
      Abstract: Abstract Phase behavior and extraction ability of aqueous two-phase systems(ATPs) consisting of ionic liquids(ILs), Cs2CO3 and water were investigated in this paper. Four kinds of ionic liquids, namely, 1-amyl-3-methylimidazolium bromide([C5mim]Br), 1-hexyl-3-methylimidazolium bromide([C6mim]Br), 1-heptyl-3-methylimidazolium bromide ([C7mim]Br) and 1-octyl-3-methylimidazolium bromide([C8mim]Br), were examined to discuss the influence of alkyl groups. Binodal curves and tie-lines at 288.15, 298.15 and 308.15 K were obtained. The partitioning behavior for L-tryptophan in such ATPs was further investigated. The effect of temperature, pH, Cs2CO3 concentration and the structure of ionic liquids on the partitioning were discussed in detail.
      PubDate: 2018-01-04
      DOI: 10.1007/s40242-018-7148-8
       
  • Amphiphilic seven-arm star triblock copolymers with diverse morphologies
           in aqueous solution induced by crystallization and pH
    • Authors: Rui Sun; Ying Wang; Pengfei Gou; Min Zuo; Xiaodong Li; Weipu Zhu; Zhiquan Shen
      Abstract: Abstract Well-defined amphiphilic seven-arm star triblock copolymers containing hydrophobic crystalline poly(ε-caprolactone)(PCL) blocks, hydrophobic non-crystalline poly(tert-butyl acrylate)(PtBA) blocks and hydro-philic poly(ethylene glycol)(PEG) blocks were precisely synthesized by a combination of ring-opening polymeriza-tion(ROP), atom transfer radical polymerization(ATRP) and “click” reaction. Such star copolymers could self-assemble into “core-shell-corona” micelles and “multi-layer” vesicles depending on the fraction of each block. Meanwhile, the selective hydrolysis of middle PtBA blocks into the poly(acrylic acid)(PAA) blocks allowed the star block copolymers to further change their morphologies of aqueous aggregates in response to pH values.
      PubDate: 2017-12-23
      DOI: 10.1007/s40242-017-7218-3
       
  • Recovery of metals from anodic dissolution slime of waste from electric
           and electronic equipment(WEEE) by extraction in ionic liquids
    • Authors: Ana Maria Popescu; Kazimir Yanushkevich; Vasile Soare; Cristina Donath; Elena Ionela Neacsu; Virgil Constantin
      Abstract: Abstract The recovery of metals from a multi-component alloy obtained by crushing, melting and anodic dissolu-tion of waste from electric and electronic equipment(WEEE) was investigated. The anodic dissolution of the alloy was carried out in an electrolysis cell with one copper cathode and a central cast anode, immersed in the electrolyte formed by choline chloride-ethylene glycol-iodine. The temperature of the electrolyte during the process was 343 K. Depending on the electrolysis parameters(current density and cell voltage), cathodic deposits of Sn, Pb and Zn of >99% purity were obtained. Cyclic voltammetry was used in order to determine the deposition potentials of the studied metals. The obtained metallic deposits were subject of determination of XRD, SEM/EDX and AFM in order to evidence the deposits structure and morphology. The experiments performed demonstrated the possibility of separating/selective recovery of metals from the multi-component alloy resulted from the waste from electrical and electronic equipment by anodic dissolution in ionic liquids.
      PubDate: 2017-12-23
      DOI: 10.1007/s40242-017-7225-4
       
  • Electrochemical immunoassay of E. coli in urban sludge using electron
           mediator-mediated enzymatic catalysis and gold nanoparticles for signal
           amplification
    • Authors: Wenjie Lu; Rongjin Xu; Xinai Zhang; Jianzhang Shen; Changfeng Li
      Abstract: Abstract An electrochemical immunosensor was developed for sensitive assay of E. coli in urban sludge, in which electron mediator-mediated enzymatic catalysis and gold nanoparticles(AuNPs) were utilized for signal amplification. The immnuosensing platform chitosan-thionine(chit-thio)/poly(amidoamine) dendrimer-encapsulated AuNPs [PAMAM(Au)] composites were first prepared from chit-thio and PAMAM(Au) using the layer-by-layer method to provide a matrix for high-stability and high-bioactivity bindings of the capture antibody(cAb). Moreover, the {dAb-AuNPs-HRP} nanoprobes were designed to exploit the amplification effect of the carrier AuNPs due to the loading amounts of horseradish peroxidase(HRP) and the detection antibody(dAb). The sandwich-type immunoassay was then successfully used to assay E. coli based on the oxidation of thionine as a result of H2O2-induced enzymatic catalytic reaction by HRP. This study presents a powerful tool in electrochemical immunoassay for E. coli detection with rapid response, high-sensitivity and high-specificity, providing a potential new tool for feasibility assessment of sludge recycle.
      PubDate: 2017-12-23
      DOI: 10.1007/s40242-017-7254-z
       
 
 
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