JOURNAL OF ADVANCES IN CHEMISTRY最新文献

{"title":"Fiber Optic Aided Spectrophotometric Determination of Gadolinium in FBR Reprocessing Streams","authors":"S. Ganesh, Pandey N.K","doi":"10.5121/ijac.2017.3201","DOIUrl":"https://doi.org/10.5121/ijac.2017.3201","url":null,"abstract":"A new spectrophotometric method has been developed for the quantitative analysis of gadolinium using 1, 2-dihydroxy anthraquinone-3-sulphonic acid, sodium salt (Alizarin Red S). Influence of various parameters such as concentration of complexing agent, pH, and interference of other competing metal ions was examined in a systematic manner. Gadolinium is found to be a stable complex as Gd-ARS at pH 4.6-4.8 and having a maximum absorbance at 530 nm. Beer’s law was found to be obeyed in 1to14 μg/mL range of gadolinium with a correlation coefficient of R 2 = 0.9992 (n=14). The system allowed for the determination of gadolinium with a limit of detection (LOD) (3.3σ/S) of 0.264 μg/mL, limit of quantitation (LOQ) (10σ/S) of 0.8 μg/mL. The precision expressed as relative standard deviation (RSD) of 0.38 % and 1.96 % at 5.4 and 1.85 mg/L. Its molar absorptivity and Sandell’s sensitivity are found to be 9.33x10 3 L.Mol -1 .cm -1 and 1.07x10 -4 μg/cm 2 respectively. An easy and versatile determination of gadolinium concentration during the solvent extraction study of Gadolinium with 30% tri-n-butyl phosphate-nitric acid system is proposed.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"60 1","pages":"01-10"},"PeriodicalIF":0.0,"publicationDate":"2017-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83506693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leucine: green and efficient catalyst for the synthesis of 4H-chromenes","authors":"D. Azarifar, Younes Abbasi, Omolbanin Badalkhani","doi":"10.24297/JAC.V10I9.6168","DOIUrl":"https://doi.org/10.24297/JAC.V10I9.6168","url":null,"abstract":"Leucine, a naturally occurring α-amino acid, has been found as an effective catalyst to effect the one-pot three-component condensation reaction between aromatic aldehydes, malononitrile and 5,5-dimethyl-1,3-cyclohexanedione (dimedone). Various 2-amino-4-aryl-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydro-4 H -chromene-3-carbonitrile derivatives are conveniently prepared by these reactions in excellent yields. High yields, short reaction times, simple work-up, use of green and naturally occurring catalyst and solvent are the main merits of the present protocol.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"41 1","pages":"3197-3202"},"PeriodicalIF":0.0,"publicationDate":"2017-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78531858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, Spectral Characterization and Antibacterial Investigation of Ni(II) Coordination Complexes of Macrocyclic Schiff base ligands Derived from 4-Aminoantipyrine","authors":"Abraham Lincoln, Srinath Boinapalli, A. Kumar","doi":"10.24297/JAC.V13I12.6124","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6124","url":null,"abstract":"A series of Ni(II) complexes (NiL1-NiL5) have been synthesized from macrocyclic Schiff base ligands (L1-L5) were obtained from condensation of  4-aminoantipyrine derivative (L) with different diamines and hydrazides. All these compounds were well characterized by elemental, spectral analysis(mass, IR, 1H-NMR, electronic), magnetic suseceptibility, molar conductance and thermal studies. Macrocyclic Schiff bases are tetradentate with N4 donor system around the metal ion.Octahedral geometry have been assigned for all complexes. All ligands and complexes were examined for antibacterial activity and found that complexes were more potent when compared to ligands.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"169 1","pages":"5948-5958"},"PeriodicalIF":0.0,"publicationDate":"2017-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88461449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibacterial activity of coumarine derivatives synthesized from 4-amino7-chloro-2-oxo-2H-chromen -3-carbaldehyde and comparison with standard drug","authors":"A. Behrami, K. Vaso","doi":"10.24297/JAC.V12I6.6153","DOIUrl":"https://doi.org/10.24297/JAC.V12I6.6153","url":null,"abstract":"In present paper , we report the organic syntheses of three compounds from 4-Amino-7-chloro -2-oxo-2H –chromen -3carbaldehyde and describe the results of antibacterial activity of purified compounds.7-Chloro-4-[(2-hydroxy-benzylidene)amino]-2-oxo-2H-chromen-3-carbaldehyde(1a).4-[(2-Hydroxy-benzylidene)-amino]-7-(4-hydroxy-phenylamino)-2-oxo-2Hchromen-3-carbaldehyde (2a) ,([4-[(2-Hydroxy-benzylidene)-amino]-7-(4-hydroxyl-phenylamino)-2-oxo-chromen-3ylmethylene]-amino)-acetic acid (3a),have been synthesized and characterized using melting points , IR spectra , 1H-NMR and 13C-NMR spectra. The antibacterial activity of synthesized compounds and streptomycin and cefalexine at concentractions of 2mg/ml, 3mg/ml and 5mg/ml , have been evaluated against three strains of bacterial culture; Staphylococcus aureus, E.coli and Bacillus cereus. The compounds show bacteriostatic and bactericidal activity.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"8 1","pages":"4108-4111"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88413452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel cyclic voltammetry behavior of 3-((benzothiazol-2- diazenylnaphthalene-2,7-diol and use it for spectrophotometric determination of copper (II )in honey sample","authors":"Fatma A. Khazaal, H. Mohammed, Muhammed . M.Radhi","doi":"10.24297/JAC.V12I7.6123","DOIUrl":"https://doi.org/10.24297/JAC.V12I7.6123","url":null,"abstract":"Abstract ; The azo reagent 3-((benzothiazol-2-diazenylnaphthalene-2,7-diol] was synthesized and characterized by FT-IR , 1 H-NMR and 13 CNMR spectral techniques. The electrochemical behavior of the azo reagent and its complex with Cu (II) has been studied at glassy carbon disk GCE electrode in different supporting electrolyte at concentration (1M) and scan rate (100mv.s -1 ). Spectrophotometric determination of copper (II ) is based on the formation of a 2:1 complex with above reagent. The complex has  λmax at(588) nm and Ԑmax of( 1.436x10 4) L.mol -1 .cm -1 .  A linear correlation (0.1 – 3.0 μg. ml -1 ) was found between absorbance at λmax and concentration .  The effect of diverse ions on the determination of copper (II) to investigate the selectivity of the method were also studied . The stability constant of the product was (1.1x10 8 ) . The proposed method was successfully applied to the analysis of honey sample .","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"11 1","pages":"4243-4255"},"PeriodicalIF":0.0,"publicationDate":"2017-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81532715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE STRUCTURAL, MORPHOLOGICAL AND OPTICAL STUDY OF PURE AND W-DOPEDTiO2 NANO PARTICLES AND ITS APPLICATION TO ANTIMICROBIAL ACTIVITY","authors":"M. Kandasamy","doi":"10.24297/jac.v13i3.6712","DOIUrl":"https://doi.org/10.24297/jac.v13i3.6712","url":null,"abstract":"In this research work, the effect of tungsten-doping on the crystal structure, morphology and antimicrobial of titanium dioxide nanoparticles were studied. The pure and different weight % of tungsten doped TiO 2 nanoparticles were synthesized by sol-gel method and calcinated at 600° C for 5 h. The synthesised products have been characterized by X-ray Diffraction studies (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray analysis (EDXA), Ultraviolet-Visible Diffuse Reflectance Spectroscope (UV-Vis), Photoluminescence Spectra (PL), High Resolution Transmission Spectroscopy (HRTEM) and Fourier Transform Infra Red Spectroscopy (FT-IR). XRD pattern of pure TiO 2 and 1 wt % W-doped TiO 2 nanoparticles confirms the anatase structure and increase in the W-doping changes the phase of TiO 2 to rutile. Average crystallite size of synthesized nanoparticles was determined using the Debye-Scherrer formula. The crystallite size obtained for pure TiO 2 is 37 nm and W-doped TiO 2 is 28 nm, 34 nm and 33 nm. The FESEM images show the agglomerated particles of spherical-like morphology. Optical property and direct bandgap of pure and W-doped TiO 2 nanoparticles also further characterised by UV–Vis Spectroscopy. The images of HRTEM clearly confirm that particles present in the W-doped TiO 2 powdered sample is nanosized particles. The Kirby Bauer Agar Well Diffusion Assay method was employed to explore antimicrobial activity of nanosized pure and W-doped TiO 2 colloidal suspension against the test microorganisms two Gram positive bacteria ( Staphylococcus aureus, Bacillus subtilis ), two Gram negative Bacteria ( Escherichia coli, Pseudomonas aeruginosa ) and two fungi ( Candida albicans, Aspergillus niger ). It shows that the W-doped TiO 2 nanoparticles inhibited the multiplication and growth of the above mentioned test bacteria and fungi. Antimicrobial activity was found against all tested microorganisms which confirmed that W-doped TiO 2 nanoparticles possess high antimicrobial activity compared to pure TiO 2 nanoparticles. colloidal suspension the test microorganisms two Gram positive bacteria Staphylococcus aureus, Bacillus subtilis two Gram negative Bacteria Escherichia Pseudomonas aeruginosa and two fungi ( Candida albicans, nanoparticles inhibited the multiplication and the growth of the above mentioned test bacteria and fungi. Antimicrobial activity was found against all tested microorganisms at a concentration range of 25 µg, 50 µg, 75 µg and 100 µg of pure TiO 2 , 1 wt %,3 wt % and 5 wt % W-doped TiO 2 solutions. aseptically 3 and W-doped TiO 2 nanoparticles of each of DMSO and from this of and wt % W-doped TiO 2 nanoparticles calcinated at C (25 µg, 50 µg, 75 µg and 100 µg) solutions were taken for assay. 2 nanoparticles calcinated at assayed against Staphylococcus Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, Aspergillus niger and Candida albicans for h. After incubation plates observed for zone of inhibition","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"121 1","pages":"6065-6075"},"PeriodicalIF":0.0,"publicationDate":"2017-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75846875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational study of the chemical reactivity properties of bis (trimethyl tetrathiafulvalenyl) thiophene","authors":"B. Amel, Tahar Abbaz, A. Gouasmia, D. Villemin","doi":"10.24297/JAC.V13I12.6072","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6072","url":null,"abstract":"The chemical reactivity of four bis (trimethyltetrathiafulvalenyl) thiophene is determined by its potential (electronic) energy (hyper) surface. All the quantum chemical calculations have been carried out using DFT level of theory, B3LYP functional and 6-31G(d,p) as basis set. Molecular electrostatic potential (MEP) and HOMO-LUMO energy levels have been performed. The local reactivity descriptor such as Fukui function is also performed to determine the reactive sites within the title molecules. The chemometric methods PCA and HCA were employed to find the subset of variables that could correctly classify the compounds according to their reactivity.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"87 1","pages":"5937-5947"},"PeriodicalIF":0.0,"publicationDate":"2017-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84674102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INVESTIGATION ON ENERGY BASED DATA GATHERING APPROACH FOR WSN","authors":"S. Bharathidasan, P. Ramamoorthy","doi":"10.24297/jac.v12i25.4423","DOIUrl":"https://doi.org/10.24297/jac.v12i25.4423","url":null,"abstract":"Wireless Sensor Networks plays a vital role in all emerging areas of Wireless Platforms like Interne of Things (IoT), WiFi, WiMAX etc. Sensor nodes are communicated with or without the presence of administrator. Data gathering is a major issue in WSN which influences the throughput, energy and data delivery. In previous research, there was not taken efforts to focus on balanced data gathering.  In this research, we propose Reliable Energy Efficient Data Gathering Approach (REEDGA) to balance data gathering and overhead. To achieve this, proposed work consists of three phases. In first phase, estimation of information gathering is implemented through stable paths. Stable paths are found based on link cost. In second phase, data gathering phase is initialized to save energy in the presence of mobile sensor nodes. Overhead is kept low while keeping round trip time of gathered data. From the analytical simulation using NS2, the proposed approach achieves better performance in terms of data delivery rate, data gathering rate, throughput, delay, link availability and control overhead.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"16 1","pages":"5645-5652"},"PeriodicalIF":0.0,"publicationDate":"2017-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86477161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient Synthesis of α-Oximinoketones using Carboxyl and Nitrite Functionalized Graphene Quantum Dots: Dual role of Nanostructure as a Catalyst and Reagent","authors":"Ashkan Shomali, H. Valizadeh","doi":"10.24297/JAC.V12I6.6098","DOIUrl":"https://doi.org/10.24297/JAC.V12I6.6098","url":null,"abstract":"Carboxyl and nitrite functionalized graphene quantum dots (CNGQDs) was used for the efficient synthesis of I±-oximinoketones under free mineral acid conditions at room temperature. CNGQDs was prepared via o-nitrozation of carboxyl and hydroxyl graphene quantum dots (CHGQDs) and used as a nitrosonium source and also as an efficient acidic catalyst for the synthesis of I±-oximinoketones. The structure of the catalyst was characterized by FT-IR, XRD, TGA and photoluminescence techniques. The structures of the synthesized products were confirmed by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. Stability and recyclability of the prepared homogeneous catalyst was studied in details. Reaction times and yields of the products were compared with previous reported methods resulting high yields and also shorter reaction times.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"22 1","pages":"4089-4096"},"PeriodicalIF":0.0,"publicationDate":"2017-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86208867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Defluoridation of South Tunisian Brackish Water by Alum Coagulation/Flocculation: A Preliminary Work","authors":"K. Missaoui, W. Bouguerra, Chiraz Hannachi, Nabiha Gannouni, B. Hamrouni","doi":"10.24297/JAC.V5I3.6592","DOIUrl":"https://doi.org/10.24297/JAC.V5I3.6592","url":null,"abstract":"Fluoride removal from aqueous solution was investigated using the chemical coagulation-flocculation by alum in reason of the efficiency and the simplicity of the process. Preliminary experiments were carried out to study the effect of some operating parameters such as: pH, initial fluoride concentration, coagulant dose, adjuvant coagulation dose, flocculent dose and settling time. Obtained experimental results showed that the treatment of fluoride by alum coagulation causes acidification of the solution. The effect of the initial pH solution on fluoride removal is negligible. Experimental results proved that coagulation process is effective in waters with low or medium levels of fluoride. Defluoridation rate was seen to increase with increasing coagulant and adjuvant coagulation doses. Optimal flocculent dose and optimal settling time were found 4.2 mg L -1 of FABI  and 60 min respectively. Subsequently, experimental design methodology using two-level full factorial design was applied to optimize the defluoridation by coagulation-flocculation. Therefore, four operating parameters which are supposed to affect the removal efficiency were chosen: initial fluoride concentration, coagulant dose, coagulation adjuvant dose and settling time. From the statistical analysis, it is inferred that the four studied parameters have an influence on the fluoride removal. In fact, initial fluoride concentration has a positive effect unlike coagulant dose, coagulation adjuvant dose and settling time. Experiment tests were performed to evaluate the efficiency of coagulation-flocculation process for south Tunisian brackish water with high fluoride concentration. The obtained results showed that fluoride removal reached 59%.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"20 1","pages":"727-740"},"PeriodicalIF":0.0,"publicationDate":"2017-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76618143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}