Semnan University PressApplied Chemistry Today2981-24373920090219Determination of Dopamine in presence of Ascorbic acid by using Ultrathin Carbon Nanoparticle Composite Film Electrode.Determination of Dopamine in presence of Ascorbic acid by using Ultrathin Carbon Nanoparticle Composite Film Electrode.132353710.22075/chem.2017.537FAMandanaAmiriJournal Article20170115A ultrathin film (8- 19 nm ) composed of carbon nanoparticles and poly(diallyldimethylammonium chloride) or CNP-PDDAC is formed in a layer-by-layer deposition process at tin-doped indium oxide (ITO) substrates. Excess positive binding sites within this film in aqueous phosphate buffer at pH 7 are quantified by adsorption of indigo carmine. Characterization of film was performed by using spectrophotometry, atomic force microscopy, impedance spectroscopy, adsorption and solution redox systems. For the mixed redox system ascorbate â dopamine in 0.1 Mphosphate buffer pH 7 cyclic voltammograms suggest a rapid and selective temporary poisoning process which causes the ascorbate oxidation to be suppressed in the second potential cycle. This effect is exploited for the detection of micromolar concentrations of dopamine in the presence of millimolar ascorbate.A ultrathin film (8- 19 nm ) composed of carbon nanoparticles and poly(diallyldimethylammonium chloride) or CNP-PDDAC is formed in a layer-by-layer deposition process at tin-doped indium oxide (ITO) substrates. Excess positive binding sites within this film in aqueous phosphate buffer at pH 7 are quantified by adsorption of indigo carmine. Characterization of film was performed by using spectrophotometry, atomic force microscopy, impedance spectroscopy, adsorption and solution redox systems. For the mixed redox system ascorbate â dopamine in 0.1 Mphosphate buffer pH 7 cyclic voltammograms suggest a rapid and selective temporary poisoning process which causes the ascorbate oxidation to be suppressed in the second potential cycle. This effect is exploited for the detection of micromolar concentrations of dopamine in the presence of millimolar ascorbate.https://chemistry.semnan.ac.ir/article_537_953448218ef09472895f75989769c1ea.pdfSemnan University PressApplied Chemistry Today2981-24373920090219Technical development of sodium sulfate extraction from Urmia LakeTechnical development of sodium sulfate extraction from Urmia Lake233253810.22075/chem.2017.538FASimaSolati FarMajidEsm-HosseiniMajidEsm-HosseiniJournal Article20170115In this study the amount of sodium sulfate extraction from Urmia Lake and the optimized conditions were investigated using local climate and minimum energy via non evaporative methods. Because of ampleness of sodium sulfate supplies in Iran and also chemical inertness of this compound in production processes and as are salt the simplicity of equipment needed, studying technical points and working conditions are very important. To determine the effect of different factors such as time, temperature, etc. On the yield of products and extra purity of sodium sulfate, samples of lake water taken using vessels with the same size and conditions, and the methods of sodium sulfate extraction in environment temperature without using evaporative methods were investigated. Other elements such as Chlorine, Magnesium, Calcium, Sodium, and Potassium were also analyzed in the extracted salt. More over, economic investigations on sodium sulfate extraction were done and some plans for semi industrial and industrial projects were suggested to extract sodium sulfate with the minimum energy and cost.In this study the amount of sodium sulfate extraction from Urmia Lake and the optimized conditions were investigated using local climate and minimum energy via non evaporative methods. Because of ampleness of sodium sulfate supplies in Iran and also chemical inertness of this compound in production processes and as are salt the simplicity of equipment needed, studying technical points and working conditions are very important. To determine the effect of different factors such as time, temperature, etc. On the yield of products and extra purity of sodium sulfate, samples of lake water taken using vessels with the same size and conditions, and the methods of sodium sulfate extraction in environment temperature without using evaporative methods were investigated. Other elements such as Chlorine, Magnesium, Calcium, Sodium, and Potassium were also analyzed in the extracted salt. More over, economic investigations on sodium sulfate extraction were done and some plans for semi industrial and industrial projects were suggested to extract sodium sulfate with the minimum energy and cost.https://chemistry.semnan.ac.ir/article_538_669a03920fbc69cd137dd1ca902b2498.pdfSemnan University PressApplied Chemistry Today2981-24373920090219Optimization of Application of Optical Bryhtnees in Formulation of DetergenteOptimization of Application of Optical Bryhtnees in Formulation of Detergente333853910.22075/chem.2017.539FAFatemehEmadedimMehdiTaghdriMohamadMasjediJournal Article20170115In the present research work 5 samples of powder detergent including famous optical brightneer were prepared.Except this optical brightneer , amount of other ingredients were same in all formulation.Then optimum amount of O.B. have been determined.In the present research work 5 samples of powder detergent including famous optical brightneer were prepared.Except this optical brightneer , amount of other ingredients were same in all formulation.Then optimum amount of O.B. have been determined.https://chemistry.semnan.ac.ir/article_539_bbc082a6f541ab1b2b74373ab9f66904.pdfSemnan University PressApplied Chemistry Today2981-24373920090219Separation of Propionic Acid from Aqueous Solution by Solvent ExtractionSeparation of Propionic Acid from Aqueous Solution by Solvent Extraction404554010.22075/chem.2017.540FAAbbasaliArabiJafarMahmoudiHadiBaseriJournal Article20170115The precise Liquid - liquid equilibrium (LLE) data are needed and required in design of many chemical processes, separation operations, and fermentation industry. In this research, (LLE) data for (trichloroethylen + propionic acid + water) were determined at atmospheric pressure and 300.15 K. LLE phase diagram was obtained for this ternary system. The distribution coefficients and the selectivity factors of the solvent were calculated. It can be seen that the separation factor values decrease from 10.55 to 4.317 with increasing propionic acid weight fraction in aqueous phase from 0.06 to 0.4.The precise Liquid - liquid equilibrium (LLE) data are needed and required in design of many chemical processes, separation operations, and fermentation industry. In this research, (LLE) data for (trichloroethylen + propionic acid + water) were determined at atmospheric pressure and 300.15 K. LLE phase diagram was obtained for this ternary system. The distribution coefficients and the selectivity factors of the solvent were calculated. It can be seen that the separation factor values decrease from 10.55 to 4.317 with increasing propionic acid weight fraction in aqueous phase from 0.06 to 0.4.https://chemistry.semnan.ac.ir/article_540_6aab16ebb4c1f6dc677f779bfa37f147.pdfSemnan University PressApplied Chemistry Today2981-24373920090219Suspension polymerization of P.V.C by jelatin surfactant and AIBN as an initiatorSuspension polymerization of P.V.C by jelatin surfactant and AIBN as an initiator455654110.22075/chem.2017.541FAFariborzAzizinejadNayerDelkhah AkbariMohsenShabaniJournal Article20170115In this study production procedure of P.V.C by suspension method were investigated . The experiments were conducted by using vinyl chloride ( 99.5 % ) , jelatin , AIBN as an initiator in a reactor which was equipped with thermometer , mixer and a cooling system . The optimum ratio of monomer to (water - ethanol ) , optimum initiator concentration , optimum temperature were determined to be (100 g / 200 ml , 0.2 g , 60º C ) respectively . The optimum inherent viscosity was found to be 0.95 in cyclohexanon solvent . For quantitative analysis of chlore in P.V.C a Schiff method was used . A value 37 % chlore in P.V.C was obtained .In this study production procedure of P.V.C by suspension method were investigated . The experiments were conducted by using vinyl chloride ( 99.5 % ) , jelatin , AIBN as an initiator in a reactor which was equipped with thermometer , mixer and a cooling system . The optimum ratio of monomer to (water - ethanol ) , optimum initiator concentration , optimum temperature were determined to be (100 g / 200 ml , 0.2 g , 60º C ) respectively . The optimum inherent viscosity was found to be 0.95 in cyclohexanon solvent . For quantitative analysis of chlore in P.V.C a Schiff method was used . A value 37 % chlore in P.V.C was obtained .https://chemistry.semnan.ac.ir/article_541_926bb7dc0c306f8119a1b0e567bcc246.pdfSemnan University PressApplied Chemistry Today2981-24373920090219Synthesis, characterization and investigation of solvatechromic behavior of novel oxovanadium(IV) complexes derived from Schiff base ligandsSynthesis, characterization and investigation of solvatechromic behavior of novel oxovanadium(IV) complexes derived from Schiff base ligands576754210.22075/chem.2017.542FAAbolfazlBezaatpourJournal Article20170115This project describes the synthesis, characterization and investigation of solvatechromic behavior of novel oxovanadium(IV) complexes containing tetradentate N4 type Schiff base ligands derived from condensation of 1,2-ethylenediamine, meso-1,2-diphenyl-1,2-ethylenediamine and 1,3- propanediamine with 2-pyridinecarbaldehyde. All of the ligands (L1, L2 and L3) and complexes (VOL1, VOL2 and VOL3) were synthesized according to the well-known literature procedure and were characterized with IR, 1HNMR, UV-Vis methods. The novel VOL1, VOL2 and VOL3 complexes were obtained with (V=O) stretching band about 960-980 cm-1. All of the complexes characterized in monomeric structure. The complex VOLx (X = 1, 2 and 3) is considerably soluble in a wide variety of solvents and shows solvatochromic behavior. The 2B2ï 2E(I) transition wavenumber shows a linear correlation to the D.N. of the solvents.This project describes the synthesis, characterization and investigation of solvatechromic behavior of novel oxovanadium(IV) complexes containing tetradentate N4 type Schiff base ligands derived from condensation of 1,2-ethylenediamine, meso-1,2-diphenyl-1,2-ethylenediamine and 1,3- propanediamine with 2-pyridinecarbaldehyde. All of the ligands (L1, L2 and L3) and complexes (VOL1, VOL2 and VOL3) were synthesized according to the well-known literature procedure and were characterized with IR, 1HNMR, UV-Vis methods. The novel VOL1, VOL2 and VOL3 complexes were obtained with (V=O) stretching band about 960-980 cm-1. All of the complexes characterized in monomeric structure. The complex VOLx (X = 1, 2 and 3) is considerably soluble in a wide variety of solvents and shows solvatochromic behavior. The 2B2ï 2E(I) transition wavenumber shows a linear correlation to the D.N. of the solvents.https://chemistry.semnan.ac.ir/article_542_98afbfc489d38d0f081ca40824d243fe.pdfSemnan University PressApplied Chemistry Today2981-24373920090219Synthesis of Cefuroxime antibiotic precursor[(6R,7R)-7-[2-furanyl-(z)-2-methoxyimino]acetamido-3-hydroxymethyl-3-cephem-4-carboxylic acidSynthesis of Cefuroxime antibiotic precursor[(6R,7R)-7-[2-furanyl-(z)-2-methoxyimino]acetamido-3-hydroxymethyl-3-cephem-4-carboxylic acid677254310.22075/chem.2017.543FAYaghoubSarrafiKamalAlimohammadiKhadijehAlipourJournal Article20170115Synthesis of 3-hydroxy cefuroxime antibiotic has been reported using 7-aminocephalosporanic acid (7-ACA) and 2-furanyl-Z-2-methoxy iminoacetic acid salt. Synthesis of this compound was carried out in three steps with good yield omitting acetyl group or in fact hydrolysis of 7-aminocephalosporanic acid (7-ACA) to produce 7-amino-3-hydroxy methyl cephalosporanic acid and then chlorination of 2-furanyl-Z-2-methoxy imino acetic acid salt by phosphorus pentachloride and finally coupling of 7-amino-3-hydroxy methyl cephalosporanic acid and 2-furanyl-Z-2-methoxy imino acetyl chloride.Synthesis of 3-hydroxy cefuroxime antibiotic has been reported using 7-aminocephalosporanic acid (7-ACA) and 2-furanyl-Z-2-methoxy iminoacetic acid salt. Synthesis of this compound was carried out in three steps with good yield omitting acetyl group or in fact hydrolysis of 7-aminocephalosporanic acid (7-ACA) to produce 7-amino-3-hydroxy methyl cephalosporanic acid and then chlorination of 2-furanyl-Z-2-methoxy imino acetic acid salt by phosphorus pentachloride and finally coupling of 7-amino-3-hydroxy methyl cephalosporanic acid and 2-furanyl-Z-2-methoxy imino acetyl chloride.https://chemistry.semnan.ac.ir/article_543_2c8a0d1100fbc5a39cb7a08399f29f62.pdf