فهرست مطالب

Applied Chemical Research - Volume:12 Issue: 1, Winter 2018

Journal of Applied Chemical Research
Volume:12 Issue: 1, Winter 2018

  • تاریخ انتشار: 1396/10/24
  • تعداد عناوین: 8
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  • Saeid Taghavi Fardood, Ali Ramazani, Sang Woo Joo * Pages 8-15
    Magnesium oxide nanoparticles were synthesized using Arabic gum as a biotemplate and magnesium nitrate as the magnesium source by the sol-gel method. This method has many advantages such as nontoxic, economic viability, ease to scale up, less time consuming and environmental friendly approach for the synthesis of MgO nanoparticles without using any organic chemicals. Nanoparticles were characterized by Fourier transform infrared (FT-IR) spectroscopy, UV-visible spectroscopy and powder X-ray diffraction (XRD). The average crystallite size of MgO nanoparticles was calculated using Scherrer formula and Williamson Hall equation. The powder X-ray diffraction (XRD) analysis revealed the formation of cubic phase MgO with average particle size of 14 (Scherrer formula) and 5.3 (Williamson Hall equation) nm.
    Keywords: MgO, Arabic gum, Nanobiotechnology, Natural Hydrogel, Sol-gel
  • Mohammad Reza Saadat, Mahnaz Qomi *, Sahel Emadzadeh, Marjan Gholghasemi Pages 16-25
    In this study, hollow fiber liquid phase microextraction (HF-LPME) coupled with highperformance liquid chromatography (HPLC) with UV detection was applied for preconcentration and determination of Diclofenac sodium in biological fluids. Parameters affecting the extraction process including pH of donor phase and acceptor phase, type of extraction solvent, stirring rate, extraction time, and salt addition were studied and optimized. Under the optimized conditions donor phase pH=3, acceptor phase pH=11.7, extraction solvent n-octanol, stirring rate 750 rpm, extraction time=27 min and without the addition of salt, enrichment factors up to 170 were achieved and the relative standard deviation (RSD %) of the method was within the range of 2- 3%. The method was successfully applied to determine the concentration of diclofenac sodium in the biological samples and satisfactory results were obtained.
    Keywords: Diclofenac, Liquid-phase microextraction, HPLC, Biological samples
  • Mojtaba Ershadi, Haman Tavakkoli *, Arezoo Ghaemi, Afruz Azarkish Pages 26-41
    Nanoparticles of perovskite-type LaCo0.5Fe0.5O3 (LCFO) were fabricated by sol–gel method. Thermal decomposition process of the complex precursor was examined by means of differential thermal analysis–thermal gravimetric analysis (DTA/TGA). X-ray diffraction (XRD) results showed that single perovskite phase has been completely formed after calcination at 750 °C. In addition, the surface morphology and composition of these nanopowders were also investigated using SEM and EDX. These nanoparticles showed the excellent adsorption efficiency towards Trypan Blue (TB) as a reactive dye in aqueous solution. The adsorption studies were carried out at different pH values, dye concentrations, various adsorbent dosages and contact time in a batch experiments. LCFO exhibited good dye removal efficiency at acidic pH specially pH 2. Experimental results indicated that the adsorption kinetic data follow a pseudo-second order rate for tested dye. The isotherm evaluations revealed that the Freundlich model better fits to the experimental equilibrium data than Langmuir the model.
    Keywords: Perovskite, Nanoparticles, Sol-gel, Dye Removal, Trypan Blue
  • Mostafa Khademi Shamami, Maryam Daghighi Asli, Reza Ghiasi * Pages 42-47
    In this study, the carbyne complex, OsCl3(=CCH2CMe3)(PH3)2, structural, themochemical and electronic properties were studied in solution and gas phases. For this investigation, the chosen solvents were five solvents (methanol, acetone, ethanol, DMSO, nitromethane) with various polarities. The influence of solvent polarity on the thermodynamic, structural, solvation energy parameters and frontier orbital energies of the complex were carried out. This study is helpful opportunity for more understanding the osmium carbyne complexes chemistry, particularly in the area of catalytic and reactivity properties of osmium carbyne complexes.
    Keywords: Carbyne complex, Frontier orbitals, Solvent influence, Thermodynamic parameters
  • Asadollah Farhadi *, Mohammad Ali Takassi, Marzieh Enjilzadeh, Fereshteh Davod Pages 48-57
    Biginelli-type reaction was developed by means of a three-component condensation of an aldehyde, ethyl acetoacetate, urea or thiourea and nano alumina sulfonic acid (Al2O3-SO H) (NASA) as catalyzed. It is carried out under different conditions. In all conditions, the desired products are obtained in high yields after relatively short reaction times. Nevertheless, the reactions proceeded faster and in higher yields when they were carried out under solvent-free at 120 °C. Improving product yields and reaction time, NASA was used in a catalytic amount (0.027 mol%). An amount of catalyst used in these reactions is far less than reported (1 mol%). The rate of the reaction was also 24 times faster than the previous rate reported by Shaterian and co-workers by the same yield. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques are used to characterize the microstructural of NASA. Finally, the mechanism of this reaction was studied.
    Keywords: Nano Al2O3-SO3H, Biginelli-type, Solvent-free, SEM, TEM
  • Fatemeh Hajakbari *, Alireza Hojabri Pages 58-67
    Chromium oxide (α-Cr2O3) thin films were prepared using thermal annealing of chromium (Cr) films deposited on quartz substrates by direct current (DC) magnetron sputtering. The annealing process of the films was performed for different times of 60, 120,180 and 240 min. The influence of annealing time on structural, morphological and optical properties of the prepared films was investigated by different analysis including X-ray diffraction (XRD), atomic force microscopy (AFM) and spectrophotometry. The XRD patterns showed that upon thermal annealing the Cr films transformed to (α-Cr2O3) and the annealing time has a profound effect on crystalline structure of chromium oxide films. According to AFM results, the films surface morphologies were strongly dependent on annealing time and an increase in annealing time led to an increase in the grain size as well as in the surface roughness. The transmittance of the as deposited film was found very low and it improved after annealing.
    Keywords: Sputtering, Chromium oxide, Annealing time, Atomic force microscopy, Transmittance
  • Mohsen Sargordan -Arani *, Elham Alsadat Hoseini, Behrooz Mirza Pages 68-78
    in this work, nanocomposites comprising copper nanoparticle in cellulose acetate (CA) matrices have been prepared. In this manner, Copper nanoparticles prepared by its salt reduced by sodium borohydride at various concentration. Then this nanoparticle solution was mixed with polymer solution and electrospun by electrospinning device. The above nanocomposite has been successfully detected by SEM, EDAX, FT-IR and UV-Vis Spectroscopy and indicated that not only nanocopper and cellulose nanofiberhave created good chemical interaction but also a relatively suitable size and distribution has been yielded in the fibers. The resulted nanocomposite conductivity by four-probe method showed a remarkable conductivity produced by nanocopper distribution in the tissue of nanocomposites increasing as concentration rises. In addition, it has been realized that the above nanocomposites have good antibacterial properties against Staphylococcus aureus (grampositive) and also Escherichia Coli and Klebsiellapneumonia (gram-negative) bacteria.
    Keywords: Cellulose acetate, Nanocomposite, Copper nanoparticles, Conductive properties, Electrospinning
  • Sepideh Tanreh, Abolghasem Shameli *, Ebrahim Balali Pages 79-91
    In recent years, Nano technology and its application have moved to discovering chemical therapy drugs. Research, development for finding new targets in tumors, targeting methods and stabilizing the nano particle in targeted cells is based on drug delivery and its crucial effect. Examining the computational controlled drug delivery by graphene sheets has become very significant due to numerous side effects of this drug especially on nervous system as a result of direct injection. In this work, adsorption of Sunitinib on Si and Al or nitrogen doped graphene has been studied using density functional theory. Doping Si or Al significantly affects the adsorption of Sunitinib over graphenes. Still, not much impact of doping Ni on graphene is observed. Interaction energy, estimated using the super molecular approach ranges from 54.97 KJ mol−1 to 63.95 KJ mol−1 in the gas phase. Furthermore, the calculated density of states (DOS) shows the existing of noteworthy orbital hybridization between Sunitinib and Si or Al doped graphene during the adsorption process which is trying out to strong interaction while there is no evidence for hybridization between the those molecules and the pristine graphene. 11C and 1H chemical shielding correlate noticeably with the derivatives graphene. 11C, 27Al and 2H nuclear quadrupole coupling constants, CQ, and asymmetry parameter, η, reveal the remarkable effect of Sunitinib adsorption on electronic structure of the graphene.
    Keywords: Graphene, Binding energy, Chemical shielding, Nuclear Magnetic Resonance, Nuclear Quadrupole Resonance, Density functional theory