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CHEMISTRY (632 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: 28)
ACS Catalysis     Hybrid Journal   (Followers: 46)
ACS Chemical Neuroscience     Hybrid Journal   (Followers: 22)
ACS Combinatorial Science     Hybrid Journal   (Followers: 23)
ACS Macro Letters     Hybrid Journal   (Followers: 27)
ACS Medicinal Chemistry Letters     Hybrid Journal   (Followers: 42)
ACS Nano     Hybrid Journal   (Followers: 308)
ACS Photonics     Hybrid Journal   (Followers: 14)
ACS Symposium Series     Full-text available via subscription  
ACS Synthetic Biology     Hybrid Journal   (Followers: 25)
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: 8)
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: 8)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Adsorption Science & Technology     Open Access   (Followers: 6)
Advanced Functional Materials     Hybrid Journal   (Followers: 60)
Advanced Science Focus     Free   (Followers: 5)
Advances in Chemical Engineering and Science     Open Access   (Followers: 75)
Advances in Chemical Science     Open Access   (Followers: 19)
Advances in Chemistry     Open Access   (Followers: 24)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19)
Advances in Drug Research     Full-text available via subscription   (Followers: 25)
Advances in Environmental Chemistry     Open Access   (Followers: 7)
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: 12)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 27)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 17)
Advances in Polymer Science     Hybrid Journal   (Followers: 45)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 19)
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: 8)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alchemy : Journal of Chemistry     Open Access   (Followers: 3)
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: 68)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 22)
American Journal of Chemistry     Open Access   (Followers: 32)
American Journal of Plant Physiology     Open Access   (Followers: 13)
American Mineralogist     Hybrid Journal   (Followers: 16)
Anadolu University Journal of Science and Technology A : Applied Sciences and Engineering     Open Access  
Analyst     Full-text available via subscription   (Followers: 37)
Angewandte Chemie     Hybrid Journal   (Followers: 181)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 259)
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: 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: 25)
Applied Surface Science     Hybrid Journal   (Followers: 34)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 3)
Asian Journal of Chemistry and Pharmaceutical Sciences     Open Access  
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 3)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 11)
Biochemistry     Hybrid Journal   (Followers: 378)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 11)
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: 23)
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: 139)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 90)
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: 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: 11)
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
Carbohydrate Research     Hybrid Journal   (Followers: 25)
Carbon     Hybrid Journal   (Followers: 72)
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: 12)
Cellulose     Hybrid Journal   (Followers: 10)
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: 21)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 75)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 27)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 22)
Chemical Reviews     Hybrid Journal   (Followers: 205)
Chemical Science     Open Access   (Followers: 28)
Chemical Technology     Open Access   (Followers: 34)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 57)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 23)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 33)
Chemistry & Industry     Hybrid Journal   (Followers: 8)
Chemistry - A European Journal     Hybrid Journal   (Followers: 168)
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: 3)
Chemistry Letters     Full-text available via subscription   (Followers: 45)
Chemistry of Materials     Hybrid Journal   (Followers: 268)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 20)
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: 3)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
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: 22)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 6)
Cogent Chemistry     Open Access   (Followers: 2)
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: 7)
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: 7)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 8)
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   (Followers: 1)
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: 9)
Current Science     Open Access   (Followers: 73)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 2)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 4)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)

        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  [2352 journals]
  • Effect of Cesium Modification on CuO/CeO 2 Catalysts for the Catalytic
           Decomposition of N 2 O
    • Abstract: A series of Cs-modified CuO/CeO2 mixed oxide catalysts was prepared for enhancing the stable activity of N2O decomposition. It was found that Cs modification promoted the catalytic performance of CuO/CeO2 catalysts significantly. The 1%Cs-CuO/CeO2 catalyst exhibited the best activity, and the conversion of N2O reached 100% at 380 °C in the presence of 2% O2. The catalytic behaviors were investigated by means of XRD, N2 adsorption iso-therms, XPS, H2-TPR(TPR: temperature-programmed reduction), CO-IR, O2-TPD(TPD: temperature-programmed desorption) and diffused reflectance infrared Fourier transform spectorscopy(DRIFTs). The results revealed that Cs modification promoted the activity and the oxygen resistance by enhancing the desorption of surface oxygen species and increasing the content of Ce3+. CO-DRIFTs revealed that Ce3+ could efficiently facilitate the regeneration of active Cu+ sites by an oxygen migration step. The possible reaction mechanism was also discussed.
      PubDate: 2019-01-14
  • Synthesis and Properties of Novel Fluorescence Probe Based on
           1,8-Naphthalimide for Detection of Hydrogen Sulfide
    • Authors: Yunxia Ma; Jie Zhang; Hongmei Qu
      Abstract: Two fluorescence-enhanced probes, 4-(2,4-dinitrophenoxy)-N-(2-hydroxyethyl)-1,8-naphthalimide(NTE-1) and 4-(2,4-dinitrophenoxy)-N-(4-(2,4-dinitrophenoxy)phenyl)-1,8-naphthalimide(NTE-2), have been designed and synthesized for detection of H2S. 4-Hydroxy-1,8-naphthalimide as fluorophore in combination with 2,4-dinitrophenyl ether as H2S response site constructed the fluorescence probes. The consequences showed that both NTE-1 and NTE-2 displayed large red-shift(excess 100 nm) in absorption spectra and more than 30-fold fluorescence enhancement in response to H2S. Moreover, the dual site probe, NTE-2, displayed wider linear range between fluorescence intensity and concentration of H2S(0—40 μmol/L) compared with single site probe, which can be applied to quantitative detection of high concentration of H2S. The photoinduced electron transfer(PET) response mechanism of probe was further studied by analyzing the distributions of molecular orbital. Importantly, the probes have potential practical applications in detection of H2S.
      PubDate: 2019-01-05
      DOI: 10.1007/s40242-019-8239-x
  • PhIO-mediated Synthesis of Ketones from Alkynes and Alkenes
    • Authors: Ying Wei; Xiangping Zheng; Xinmiao Xie
      Abstract: A facile and efficient method for the preparation of methyl ketones was developed in the reaction of alkynes and alkenes with PhIO-BF3∙Et2O. The reaction features mild conditions, short time and metal-free catalyst. The possible mechanism for the formation of methyl ketones was proposed. H2O functions as both a nucleophile and an oxygen source.
      PubDate: 2019-01-05
      DOI: 10.1007/s40242-019-8264-9
  • In situ Characterization of Phase Transition of Amorphous Poly(9,9-di- n
           -octyl-2,7-fluorene) Thin Film During Thermal Annealing
    • Authors: Shengfei Meng; Pengyue Wang; Liuran Chen; Guanghui Gao; Jidong Zhang
      Abstract: Amorphous poly(9,9-di-n-octyl-2,7-fluorene)(PFO) thin films were characterized in situ via thermal annealing based on grazing incidence X-ray diffraction(GIXRD) profiles, UV-visible absorption spectrophotometry, and Fourier transform infrared spectroscopy(FTIR). The results of GIXRD indicated that the amorphous phase transformed into a crystalline phase when the annealing temperature was higher than 80 °C. Different outcomes were elicited for the intensities and d-spacings of the diffraction peaks below and above 80 °C, which were attributed to the formation of the κ-phase. The mechanism of phase transition was revealed by in situ UV-visible absorption and FTIR spectra, whereby the rearrangement of the side chains was dominant and the movement of the main chains was minimal, even when the annealing temperature was lower than 80 °C. In contrast, the rearrangement of the main chains was dominant when the temperature was higher than 80 °C.
      PubDate: 2019-01-05
      DOI: 10.1007/s40242-019-8159-9
  • Spectral Study on the Interactions Among Cu(II), Doxorubicin and CopC
    • Authors: Yunxi Song; Zhen Song; Binsheng Yang
      Abstract: Interactions among Cu(II), doxorubicin and CopC have been investigated in detail by means of fluorescence, UV-Vis, IR spectra, isothermal titration calorimetry(ITC) and molecular docking in Tris-HCl buffer(50 mmol/L, pH=7.4, 25 °C). The results suggest that Cu(II)-doxorubicin is formed in a Cu(II) to doxorubicin ratio of 1:2, and the conditional stability constant, K[Cu(II)-doxorubicin] is 1.90×109 L2/mol2, CopC and doxorubicin can form a 1:1 complex, the conditional stability constant is greater than 105 L/mol. Binding of doxorubicin causes a conformational change in CopC with the reduction of β-sheet and increase of random coil, and the stability of CopC is decreased. Cu(II), doxorubicin and CopC can form a CopC-Cu(II)-doxorubicin ternary complex. The formation of CopC-Cu(II)- doxorubicin reduced greatly the reduction rate of Cu(II) by ascorbate(Vc), i.e. the binding of doxorubicin affects the action of CopC as redox switch.
      PubDate: 2019-01-05
      DOI: 10.1007/s40242-019-8284-5
  • Effects of Cerium Oxides on the Catalytic Performance of Pd/CNT for
           Methanol Oxidation
    • Authors: Weimin Chen; Yu Zhang; Zhenyu Zhu
      Abstract: The carbon nanotubes supported palladium(Pd/CNT) nanocatalysts were modified by cerium oxides/hydroxides and their catalytic performances for methanol oxidation were evaluated. Electrochemical measurements indicate that the introduction of cerium remarkably improves the catalytic activity of Pd/CNT catalysts towards methanol oxidation. X-Ray photoelectron spectra results reveal an interaction between palladium and cerium oxides. It is also observed that cerium-modified catalysts have excellent poison resistances, which is attributed to the poison-removal ability of cerium oxides/hydroxides. The highly oxidized cerium oxides/hydroxides have a strong ability to inhibit the accumulation of carbonaceous intermediates on the active sites of Pd catalysts.
      PubDate: 2019-01-05
      DOI: 10.1007/s40242-019-8097-5
  • Acylation of Anisole Catalyzed by Hierarchical Porous H β Zeolite
           Modified with Cr
    • Authors: Guohua Li; Huipeng Li; Hua Zhao; Tianfeng Cai; Yange Li; Shengnan Guan
      Pages: 877 - 881
      Abstract: Modified hierarchical porous Hβ zeolite was obtained by metal modification of Hβ zeolite, which was treated with alkaline solution, and the catalysts before and after modification were characterized by means of X-ray diffraction(XRD), nitrogen adsorption-desorption, scanning electron microscopy(SEM), X-ray fluorescence(XRF), NH3 temperature-programmed desorption and Fourier-transform infrared spectroscopy(FTIR). The activities of acylation of anisole with acetic anhydride were also investigated. The results show that the Hβ zeolite, which was treated with alkaline solution has microporous and mesoporous structures that could improve the diffusion performance of chemical reaction. The amount of acid was modulated with metal modification. The Hβ zeolite modified by 5%(mass fraction) metal chromium had the best catalytic performance. The conversion of acetic anhydride acylation was 93.01% under the optimal conditions, which was higher than that of other catalysts. The catalyst not only showed good activity, but also exhibited a stable performance in regeneration tests.
      PubDate: 2018-12-01
      DOI: 10.1007/s40242-018-8151-9
      Issue No: Vol. 34, No. 6 (2018)
  • Eco-friendly and Cleaner Process Using Online Microwave-assisted Steam
           Extraction Coupled with Solid-phase Extraction for Trace Analysis of
           Sulfonamides in Animal Feed
    • Authors: Guijie Li; Chang Liu; Dawei Wang; Lan Ding
      Pages: 893 - 898
      Abstract: An environmentally friendly method for extracting sulfonamides(SAs) residues from animal feed was described and applied. The method used online microwave-assisted steam extraction coupled with solid phase extraction(MASE-SPE), which was followed by the analysis using high performance liquid chromatography-mass spectrometry(HPLC-MS/MS). The SAs residues were extracted successively with water steam under microwave irradiation, and thus directly introduced into an SPE column containing cation-exchange resin. The SAs were then eluted with methanol-ammonia(90:10, volume ratio) from the SPE column and followed by HPLC-MS/MS. The limits of detection(LODs) for the analytes ranged from 0.24 ng/g to 0.49 ng/g. The limits of quantification(LOQs) ranged from 0.82 ng/g to 1.63 ng/g. Average recoveries of SAs were 76.3%―92.1%. The developed method was a reliable and environmentally friendly alternative to previous methods with respect to time, solvent and labor consumption for the analysis of SAs in animal foodstuffs.
      PubDate: 2018-12-01
      DOI: 10.1007/s40242-018-8166-2
      Issue No: Vol. 34, No. 6 (2018)
  • Quantitative Determination of Urine Glucose: Combination of Laminar Flow
           in Microfluidic Chip with SERS Probe Technique
    • Authors: Dan Sun; Xiangyuan Liu; Shuping Xu; Yu Tian; Weiqing Xu; Yanchun Tao
      Pages: 899 - 904
      Abstract: A surface-enhanced Raman scattering(SERS) sensing approach for urine glucose was developed based on the laminar flow technology in a cross-type microfluidic chip with SERS probes, 4-mercaptophenylboronic acid (MPBA) functionalized Ag nanoparticles. MPBA as the glucose receptor can identify and bind up with glucose at a molar ratio of 2:1, which can cause the aggregation of SERS probes at a certain position of the chip channel and further enhance the SERS signal of MPBA significantly. Thus, the quantitative SERS detection of glucose was achieved indirectly. No sample pretreatment and separation were needed in this method since the SERS detection was achieved in the gradient diffusion and molecular recognition processes between urine glucose and SERS probe in the laminar flow, which simplified the sample treatment procedures, saved detection time and made it feasible for clinic applications. This method shows a good linear relationship within human body’s normal physiological range and has high sensitivity and selectivity. The lowest detection concentration can reach 1.0 mg/dL.
      PubDate: 2018-12-01
      DOI: 10.1007/s40242-018-8163-5
      Issue No: Vol. 34, No. 6 (2018)
  • Stripping Voltammetric Analysis of Mercury at Base-treated Graphene Oxide
    • Authors: Yaru Qiu; Lini Dong; Dong Xiang; Li Li; Liande Zhu
      Pages: 971 - 977
      Abstract: According to the Rourke’s model, graphene oxide(GO) synthesized from the oxidation of graphite actually consisted of partly oxidized graphene sheets and highly oxidized debris(OD). The OD was strongly adhered to the surface of graphene sheets, while they could be facilely removed by a base-washing procedure. The existence and removal by base-washing of OD were characterized by means of thermogravimetric analysis(TGA), FTIR spectroscopy, X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM) and Raman spectroscopy. The adsorption of OD not only made a great difference to the physical and chemical properties of GO, but also affected its electrochemical behavior when it was employed as an electrode material. In this article, we demonstrated that the electrochemical deposition and the subsequent voltammetric stripping analysis of mercury were significantly influenced by the presence of OD. The consequence suggests that the presence of OD on the sheets of GO restricts the electrochemical deposition behavior of mercury and further lowers the sensitivity of the voltammetric stripping responses. The sensitivity was observed as 0.78 A L mol‒1 at base-washed(bw)-GO/GC(glassy carbon) better than that at as-prepared GO(a-GO)/GC for 0.28 A L mol‒1. The limit of detection was calculated as 2.95 and 0.83 μmol/L before and after removing the OD, respectively. The availability of both electrodes was evaluated by detecting Hg2+ in lake water specimens using standard samples recovery.
      PubDate: 2018-12-01
      DOI: 10.1007/s40242-018-8134-x
      Issue No: Vol. 34, No. 6 (2018)
  • pH-Responsive Polycarbonate Copolymer-based Nanoparticles for Targeted
           Anticancer Drug Delivery
    • Authors: Yunxia Li; Wenjuan Du; Zhiguang Fu; Huanhuan Wang; Jiexin Wang; Yuan Le; Jianjun Zhang; Ning Wen
      Pages: 1041 - 1050
      Abstract: A smart polycarbonate(PCA) copolymer-based nanoparticle(NanoPCA) with pH-responsive, long-term stability, and tumor targeting ability was successfully developed by synthesizing and assembling a series of functional PCA-based copolymers including poly(2-amino-1,3-propanediol carbonate-co-L-lactide)[P(CA-co-LA)], poly(2-amino-1,3-propanediol carbonate-co-L-lactide)-g-methoxy-poly(ethylene glycol)[P(CA-co-LA)-g-MPEG], and poly(2-amino-1,3-propanediol carbonate-co-L-lactide)-g-poly(ethylene glycol)-cyclic(Arg-Gly-Asp-D-Phe-Lys) [P(CA-co-LA)-g-PEG-cRGD] for targeted anticancer drug delivery. pH-Responsive studies demonstrated that the loading doxorubicin(DOX) released faster from NanoPCA at acidic conditions due to protonation effects of P(CA-co-LA) copolymers. Furthermore, the in vitro and in vivo investigations demonstrate that the DOX-loaded NanoPCA exhibited significant tumor targeting ability, outstanding antitumor effect and excellent biological safety in the treatment of oral squamous cell carcinoma(OSCC). Therefore, this work provides a promising drug delivery platform for cancer therapy and other applications.
      PubDate: 2018-12-01
      DOI: 10.1007/s40242-018-8147-5
      Issue No: Vol. 34, No. 6 (2018)
  • Bio-template Synthesis of Spirulina/ α -Fe 2 O 3 Composite with
           Improved Surface Wettability
    • Authors: Qingling Meng; Chenchen Xie; Ran Ding; Liang Cao; Ke Ma; Li Li; Zhankun Weng; Zuobin Wang
      Pages: 1058 - 1062
      Abstract: Bio-template method has recently attracted much attention because of its prominent advantages in obtaining morphology controlled materials with structural specificity, complexity and their unique functions. The bio-template method combining with electrochemical deposition was employed to synthesize spirulina/hematite composite microstructures using native spirulina as template. A great amount of hematite(α-Fe2O3) nanoparticles can be formed and deposited onto the spirulina, resulting in a robust and pseudo-homogeneous surface. And the spirulina/α-Fe2O3 composite exhibits an improved surface wettability due to its helical morphology. This facile strategy may open new horizons in the field of replicating specific biological structures for functional materials in other potential applications.
      PubDate: 2018-12-01
      DOI: 10.1007/s40242-018-8080-7
      Issue No: Vol. 34, No. 6 (2018)
  • Novel Approach for the Decoration of Magnetic Carbon Nanospheres with
           Platinum Nanoparticles and Their Enhanced Peroxidase Activity for the
           Colorimetric Detection of H 2 O 2
    • Authors: Ce Su; Lingling Bai; Hongbo Zhang; Kaishan Chang; Guanbin Li; Siliang Li
      Abstract: Pt/Fe3O4-DIB-DETA-CNS(PFDDC) nanocomposite(DIB=2,4-dihydroxybenzaldehyde; DETA=diethylene- triamine; CNS=carbon nanosphere) was synthesized by dispersing Pt nanoparticles on magnetic carbon nanospheres. The structure, morphology and composition of the nanocomposite were studied by X-ray diffraction(XRD), transmission electron microscopy(TEM), energy-dispersive X-ray spectroscopy(EDX) and X-ray photoelectron spectroscopy(XPS). In addition, the nanocomposite showed superior peroxidase-like activity towards 3,3′,5,5′-tetramethylbenzidine(TMB) with a visual color change in the presence of hydrogen peroxide(H2O2). Therefore, the PFDDC nanocomposite provides a sensing platform for the colorimetric detection of H2O2 with high sensitivity and selectivity. Furthermore, the nano-composite can be conveniently preserved and separated. These features enable the nanocomposite to colorimetrically detect H2O2 for potential pharmaceutical, environmental and industrial applications.
      PubDate: 2018-12-21
      DOI: 10.1007/s40242-018-8154-6
  • Two Pentavanadate-based Organic-inorganic Materials with Third-order NLO
    • Authors: Yanzhao Yu; Jiapeng Cao; Yan Xu
      Abstract: Two isolated organic-inorganic pentavanadate-based hybrids, \({\rm[H_2N(CH_3)_2]_{6.34}[V^V(\mu_3-O)_4V^{IV}_4O_5(SO_4)_4]\cdot(SO_4)_{0.67}\cdot(DMF)\cdot[HN(CH_3)_2]_{1.66}}\) (1) and [(HN)2(CH2)2(CH3)4][VV(μ3-O)4V4IVO5(SO4)4][H2N(CH3)2]3·(DMF)· [HN(CH3)2]0.5(2)(DMF=N,N-dimethylformamide) have been synthesized under solvothermal conditions and structu-rally characterized. In compound 1, three adjacent basic units form a triangle type cluster. The symmetric double-layer exists in compound 2. The study of the third-order nonlinear optical(NLO) properties for the two compounds demonstrates that the two-photon absorption(TPA) cross-section σ values of compounds 1 and 2 are 1372 and 1228 GM, respectively, indicating that both compounds may have potential application in optical field.
      PubDate: 2018-12-21
      DOI: 10.1007/s40242-018-8276-x
  • Dissipative Particle Dynamics Study on Platycodin’s Solubilization
           Enhancing Effect Towards Five Drug Components
    • Authors: Zhimin Wu; Haiou Ding; Chang Yang; Shujuan Guo; Xingxing Dai; Xinyuan Shi
      Abstract: In this study, a dissipative particle dynamics mehtod was used to study the solubilization enhancing effect of platycodin towards 5 different drug components. Two factors were mainly considered, including the XlogP value of drug components and the sugar chain length of platycodin. As a result, it was found that there was an optimal drug XlogP value for the solubilization enhancing effect of platycodin, and it was different between the drug’s own XlogP value and the optimal drug XlogP value of platycodin that determines the solubilization enhancing effect.
      PubDate: 2018-12-15
      DOI: 10.1007/s40242-018-8250-7
  • Electrochemical Co-reduction of Bi(III) and Y(III) and Extracting Yttrium
           from Molten LiCl-KCl Using Liquid Bi as Cathode
    • Authors: Mei Li; Yichuan Liu; Zhongxuan Sun; Wei Han; Milin Zhang; Xiaoguang Yang; Yang Sun
      Abstract: The electrochemical reaction of Bi(III) and co-reduction behaviour of Bi(III) and Y(III) ions were researched in molten LiCl-KCl on a tungsten(W) electrode employing a range of electrochemical techniques. Cyclic voltammetric and square-wave voltammetric results revealed that the reduction of Bi(III) was a one-step process, with the exchange of three electrons on a W electrode, and diffusion-controlled. The electrochemical curves showed two reduction peaks pertaining to the formation of Bi-Y alloy compounds, because of the co-reduction of Bi(III) and Y(III) by metallic Y deposited on the pre-deposited Bi-coated W electrode and reacting with Bi metal in molten LiCl-KCl. Furthermore, galvanostatic electrolysis was conducted using liquid Bi as cathode to extract yttrium at different current intensities, and the extractive products were analyzed by SEM, EDS and XRD. The results indicated that BiY intermetallic compound was formed in the molten LiCl-KCl-YCl3 system.
      PubDate: 2018-12-15
      DOI: 10.1007/s40242-018-8252-5
  • Photocatalytic Degradation of 4-Chlorophenol by Gd-Doped β -Bi 2 O 3
           Under Visible Light Irradiation
    • Authors: Shijing Lin; Wutong Du; Laga Tong; Tao Ji; Xinxin Jiao
      Abstract: Chlorophenols are known as persistent organic pollutants. Therefore, research on the removal of chlorophenols has attracted widespread attention. Herein, the photocatalytic degradation of 4-chlorophenol by Gd-doped β-Bi2O3 under visible light irradiation was studied. The results showed that Gd-doped β-Bi2O3 materials are efficient catalysts for the photocatalytic degradation of chlorophenols, and 2%(atomic fraction) Gd-doped β-Bi2O3 exhibits the highest photocatalytic activity for 4-chlorophenol degradation, because doping an appropriate amount of Gd3+ ions can effectively reduce the recombination rate of the photogenerated e‒/h+ pairs and then enhance the photocatalytic performance. When the reaction was carried out at 25 °C for 6 h using the 2% Gd-doped β-Bi2O3 micro/nano mate-rials of 200 mg and at air flow rate of 40 mL/min, the degradation rate of 4-chlorophenol reached 92.3%. Additionally, based on the analysis of the products, it was speculated that the dominant photocatalytic degradation mechanism of 4-chlorophenol by Gd-doped β-Bi2O3 under visible light irradiation is an oxidative process involving an attack by the hydroxyl radical.
      PubDate: 2018-12-13
      DOI: 10.1007/s40242-018-8170-6
  • A Highly Efficient and Recyclable Solid Acid Catalyst for Synthesis of
           Spiro-oxindole Dihydroquinazolinones Under Ultrasound Irradiation
    • Authors: Xiufang Yang; Xiaogang Wang; Tingting Wang; Weitao Wang; Jin Zhang; Yangmin Ma
      Abstract: A simple, efficient and green procedure for the synthesis of spiro-oxindole dihyfroquinazolinones was developed by multi-component condensation of isatoic anhydride, aniline and isatin in the presence of a novel solid acid catalyst under ultrasound irradiation. The present environmentally benign protocol offers several advantages, such as shorter reaction time, a wide range of functional group tolerance, the use of an inexpensive heterogeneous catalyst, and a high yield of products via a simple experimental and work-up procedure. The mesoporous solid acid catalyst was directly prepared from phytic acid by microwave-sulfonation method without template. The phytic acid based solid acid was fully characterized by means of Fourier transform infrared spectroscopy(FTIR), Raman spec-troscopy, X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), and transmission electron microsco-py(TEM). The catalyst can be recovered and reused for at least five runs without significant impact on the product yields.
      PubDate: 2018-12-13
      DOI: 10.1007/s40242-018-8248-1
  • Synthesis and Antitumor Activity of Sorafenib Analogs Containing a
           Tetrazole Moiety
    • Authors: Ye Tian; Simiao Yu; Lude Cai; Guowei Gong; Guodong Wu; Hongxia Qi; Yanfang Zhao; Mingze Qin
      Abstract: A novel series of diaryl biuret derivatives containing a tetrazole moiety was designed and synthesized. All the target compounds were evaluated for their in vitro antitumor activity against HT-29, HepG2, MCF-7 and A549 cells by MTT assay. Most of them exhibited obvious antitumor activity, and four of them(4a, 4c, 4h and 7a) were superior to sorafenib in general. Among them, Compound 4h displayed more potent activity than sorafenib in all tested cancer cells. Compound 4c exhibited the most outstanding activity in inhibition of growth of HepG2 cells(IC50=0.55 μmol/L). Further, they both revealed favorable metabolic stability in in vitro assay. Compounds 4c and 4h are promising candidates for further development.
      PubDate: 2018-12-12
      DOI: 10.1007/s40242-018-8236-5
  • Synthesis, Structure Characteristic and Thermal Behavior of Two New
           Metal-organic Azo-triazole Compounds: [Zn(phen) 3 ]·ZTO·6H 2 O and
           [Cu(phen) 3 ]·ZTO·6H 2 O
    • Authors: Zimei Ding; Wenli Cao; Hui Zheng; Jie Huang; Kangzhen Xu; Jirong Song
      Abstract: [Zn(phen)3]·ZTO·6H2O(1) and [Cu(phen)3]·ZTO·6H2O(2) were synthesized by the reaction of Zn(NO3)2·6H2O/Cu(NO3)2·3H2O with 4,4-azo-1H-1,2,4-triazol-5-one(ZTO) and 1,10-phenanthroline(phen). The two compounds were characterized by elemental analysis and IR spectrum analysis, respectively. Compound 1 was also characterized by single crystal X-ray diffraction analysis. For compound 1, the coordination geometry around the Zn2+ is a distorted octahedron, with the bite angles of 76.7(3)°―77.6(4)° for all three phen ligands. Moreover, the thermal behaviors and thermal decomposition kinetics were studied and analyzed. Besides, thermal stability and safety parameters(TSADT, Tb) are 164.7 and 166.4 °C for compound 1, and 149.6 and 150.8 °C for compound 2, re-spectively.
      PubDate: 2018-11-19
      DOI: 10.1007/s40242-018-8051-z
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