Two series of Sm/Zr substituted Mg-Mn ferrite materials have been developed having the chemical compositions Mg0.95Mn0.05Sm2xFe2-2xO4 and Mg0.95Mn0.05+xZrxFe2-2xO4. These materials nanoparticles size ferrites are prepared by using sol-gel method while following ceramic method bulk (larger particle size) ferries are prepared. The value of x varies from 0.0 to 0.5. These are characterized with density, XRD, EDAX, SEM and TEM studies. Based on the obtained results cation distribution is proposed. Samarium is found to occupy B sites while zirconium occupied A and B sites replacing Fe ions. Density of all the materials found to increase except at higher values of Sm concentration. Lattice parameter of Sm substituted ferrites is found to increase with the rise of Sm content while it decreases with the rise of Zr content. These values obtained due to XRD studies have fair agreement with the theoretically computed lattice parameter values based on the proposed cation distribution. Obtained particle size values due to XRD, SEM and TEM are compared, which are in the nano range.
{"title":"Structural Studies of Sm/Zr Substituted Mg-Mn Ferrites","authors":"G. Praveen, A. Rao","doi":"10.7598/cst2019.1564","DOIUrl":"https://doi.org/10.7598/cst2019.1564","url":null,"abstract":"Two series of Sm/Zr substituted Mg-Mn ferrite materials have been developed having the chemical compositions Mg0.95Mn0.05Sm2xFe2-2xO4 and Mg0.95Mn0.05+xZrxFe2-2xO4. These materials nanoparticles size ferrites are prepared by using sol-gel method while following ceramic method bulk (larger particle size) ferries are prepared. The value of x varies from 0.0 to 0.5. These are characterized with density, XRD, EDAX, SEM and TEM studies. Based on the obtained results cation distribution is proposed. Samarium is found to occupy B sites while zirconium occupied A and B sites replacing Fe ions. Density of all the materials found to increase except at higher values of Sm concentration. Lattice parameter of Sm substituted ferrites is found to increase with the rise of Sm content while it decreases with the rise of Zr content. These values obtained due to XRD studies have fair agreement with the theoretically computed lattice parameter values based on the proposed cation distribution. Obtained particle size values due to XRD, SEM and TEM are compared, which are in the nano range.","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88251413","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}
Environmentally benign microwave induced method of organic synthesis has been taken up to carry out three component Biginelli reaction for the synthesis of N,N-dibenzoyl pyrimidin-2one derivatives. The advantages of this protocol include enhanced yield, reduced reaction time, operational simplicity, avoidance of organic solvents and eco-friendly preparation that directs towards new trends in green synthesis.
{"title":"An Efficient Synthesis of Novel N,N`-Dibenzoyl- pyrimidin-2(1H)-Ones Using Microwave Irradiation via Three-Component Biginelli Reaction","authors":"V. Deepthi, S. Triloknadh, B. Nagaraju, C. Rao","doi":"10.7598/cst2019.1586","DOIUrl":"https://doi.org/10.7598/cst2019.1586","url":null,"abstract":"Environmentally benign microwave induced method of organic synthesis has been taken up to carry out three component Biginelli reaction for the synthesis of N,N-dibenzoyl pyrimidin-2one derivatives. The advantages of this protocol include enhanced yield, reduced reaction time, operational simplicity, avoidance of organic solvents and eco-friendly preparation that directs towards new trends in green synthesis.","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81776313","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}
: Zn x Co 1-x Fe 2 O 4 and Mn x Co 1-x Fe 2 O 4 (where x=0.5 atom %) catalysts were synthesized by sol-gel technique and were further characterized by various analytical techniques. PXRD pattern confirms cubic spinel structure for both the samples. UV-Visible spectra show extended absorption in the visible region and the band gap values of Zn 0.5 Co 0.5 Fe 2 O 4 and Mn 0.5 Co 0.5 Fe 2 O 4 catalysts were found to be 1.71 and 1.67 eV. Photocatalytic of experiments show that Mn 0.5 Co 0.5 Fe 2 O 4 is a better photocatalyst compared to the Zn 0.5 Co 0.5 Fe 2 O 4 due to the unique characteristics of Mn 2+ ion which can exist in different oxidation states. confirms doped PL show lesser recombination of photogenerated charge carriers for 0.5 Co 0.5 Fe 2 O 4 compared to 0.5 Co 0.5 Fe 2 O 4 catalyst. photocatalytic activity of Mn 0.5 Co 0.5 Fe 2 O 4 catalyst is higher than the activity of CoFe and
采用溶胶-凝胶法合成了Zn × Co 1-x fe2o和Mn × Co 1-x fe2o(其中x=0.5原子%)催化剂，并用各种分析技术对其进行了进一步表征。PXRD图证实了两种样品的立方尖晶石结构。紫外可见光谱显示在可见光区吸收扩展，zn0.5 co0.5 fe2o4和mn0.5 co0.5 fe2o4催化剂的带隙值分别为1.71和1.67 eV。光催化实验表明，Mn 0.5 Co 0.5 fe2o4是一种比Zn 0.5 Co 0.5 fe2o4更好的光催化剂，因为Mn 2+离子可以存在于不同的氧化态。证实掺杂的PL在0.5 Co . 0.5 Fe . 2o4催化剂下，与0.5 Co . 0.5 Fe . 2o4催化剂相比，光生载流子的重组更少。mn0.5 co0.5 fe2o催化剂的光催化活性高于CoFe和CoFe催化剂的光催化活性
{"title":"The Enhanced Photocatalytic Activity of Mnx Co1-x Fe2 O4 Over the Znx Co1-x Fe2 O4 Under the Visible Light Irradiation: A Comparative Study","authors":"M. Srinivas, L. Devi","doi":"10.7598/cst2019.1604","DOIUrl":"https://doi.org/10.7598/cst2019.1604","url":null,"abstract":": Zn x Co 1-x Fe 2 O 4 and Mn x Co 1-x Fe 2 O 4 (where x=0.5 atom %) catalysts were synthesized by sol-gel technique and were further characterized by various analytical techniques. PXRD pattern confirms cubic spinel structure for both the samples. UV-Visible spectra show extended absorption in the visible region and the band gap values of Zn 0.5 Co 0.5 Fe 2 O 4 and Mn 0.5 Co 0.5 Fe 2 O 4 catalysts were found to be 1.71 and 1.67 eV. Photocatalytic of experiments show that Mn 0.5 Co 0.5 Fe 2 O 4 is a better photocatalyst compared to the Zn 0.5 Co 0.5 Fe 2 O 4 due to the unique characteristics of Mn 2+ ion which can exist in different oxidation states. confirms doped PL show lesser recombination of photogenerated charge carriers for 0.5 Co 0.5 Fe 2 O 4 compared to 0.5 Co 0.5 Fe 2 O 4 catalyst. photocatalytic activity of Mn 0.5 Co 0.5 Fe 2 O 4 catalyst is higher than the activity of CoFe and","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88248039","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":"One Pot, Three Component Synthesis of Tetrazoles Catalysed by Using Silica Supported Melamine Tri- sulphonic Acid as a Recyclable Heterogeneous Catalyst","authors":"","doi":"10.7598/cst2019.1529","DOIUrl":"https://doi.org/10.7598/cst2019.1529","url":null,"abstract":"","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72850391","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":"Eco-Elegant Approach for the Synthesis, Characterization and Biological Activity of 4-Thiazolidinones","authors":"","doi":"10.7598/cst2019.1535","DOIUrl":"https://doi.org/10.7598/cst2019.1535","url":null,"abstract":"","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81634363","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, Characterization, Thermal and Non-Isothermal Degradation Studies of Two Mononuclear Nickel and Copper Complexes Containing Schiff Base Moiety","authors":"","doi":"10.7598/cst2019.1532","DOIUrl":"https://doi.org/10.7598/cst2019.1532","url":null,"abstract":"","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78751729","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, Thermal and Theoretical Studies of Two Co(II) and Ni(II) Coordination Complex with N,O Donor 2-Chloro-6-[(3-hydroxy-4-methoxybenzylidene)amino]-4-nitrophenol","authors":"","doi":"10.7598/cst2019.1536","DOIUrl":"https://doi.org/10.7598/cst2019.1536","url":null,"abstract":"","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74484015","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":"Prediction and Correlations of Thermodynamic Properties of Binary Mixtures N-Ethyl-2-pyrrolidone (EP) + Ethanolamine (MEA), Diethanolamine (DEA) and Triethanolamine (TEA) as a Function of Temperature","authors":"","doi":"10.7598/cst2019.1603","DOIUrl":"https://doi.org/10.7598/cst2019.1603","url":null,"abstract":"","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91093301","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}
: NiO nanoparticles stabilized with starch was synthesized and characterized using UV-Vis, FT-IR, FESEM and XRD techniques. From FESEM analysis the morphology of the prepared NiO nanoparticles was found to be flower shaped. XRD analysis showed that the NiO nanoparticles corresponds to phase pure cubic crystals and from scherer formula the particle size was calculated to be 9±0.5 nm. Using optical absorption spectra, tha band gap energy was obtained. Photocatalytic activity of the synthesized nanoparticles was investigated by carrying out the degradation studies of norfloxacin under UV light irradiation. In the present work, we have synthesized NiO nanoparticles with biostabilizer starch and used for the photocatalytic degradation of the antibiotic NF. The as prepared NiO nanoparticles are characterized using FESEM, UV-Vis, FT-IR and XRD measurements. Progress of the photo degradation of NF in the presence of NiO nanoparticles was monitored by using time dependant UV-Vis spectra. The reaction followed pseudo first order kinetics. Rate coefficient values at different pH and the optimum pH for degradation of NF was determined.
{"title":"Synthesis, Characterisation and Catalytic Behaviour of NiO Nanoflowers for the Photo Degradation of Norflaxacin in Aqueous Medium","authors":"L. Parimala, J. Santhanalakshmi","doi":"10.7598/cst2019.1526","DOIUrl":"https://doi.org/10.7598/cst2019.1526","url":null,"abstract":": NiO nanoparticles stabilized with starch was synthesized and characterized using UV-Vis, FT-IR, FESEM and XRD techniques. From FESEM analysis the morphology of the prepared NiO nanoparticles was found to be flower shaped. XRD analysis showed that the NiO nanoparticles corresponds to phase pure cubic crystals and from scherer formula the particle size was calculated to be 9±0.5 nm. Using optical absorption spectra, tha band gap energy was obtained. Photocatalytic activity of the synthesized nanoparticles was investigated by carrying out the degradation studies of norfloxacin under UV light irradiation. In the present work, we have synthesized NiO nanoparticles with biostabilizer starch and used for the photocatalytic degradation of the antibiotic NF. The as prepared NiO nanoparticles are characterized using FESEM, UV-Vis, FT-IR and XRD measurements. Progress of the photo degradation of NF in the presence of NiO nanoparticles was monitored by using time dependant UV-Vis spectra. The reaction followed pseudo first order kinetics. Rate coefficient values at different pH and the optimum pH for degradation of NF was determined.","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89945848","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}
A simple, precise, rapid, and accurate reversed – phase high performance liquid chromatography method has been developed for the determination of paracetamol in pure from, pharmaceutical formulations and environmental water samples. Chromatography was carried out on supelco L1 (C18) reversedphase column (25cm × 4.6mm), 5 microns, using a mixture of acetonitril : buffer pH3.0 (40: 60v/v) as a mobile phase at a flow rate of 1.5 ml.min -1 . Detection was performed at 243nm at ambient temperature. The retention time was found 2.2 minutes. The calibration curve was linear (r= 0.999) over a concentration range from 10 to 100 μg/ml. Limit of detection (LOD) and limit of quantitation (LOQ) were found 3ng/ml and 9 ng/ml respectively. The method was validated for its linearity, precision and accuracy. The proposed method was successfully applied for the determination of paracetamol in pure form, pharmaceutical formulations and in environmental water samples. KEYWORD: HPLC, Paracetamol, Pharmaceutical Formulations, Environmental Water Samples.
{"title":"HPLC Method for Determination of Paracetamol in Pharmaceutical Formulations and Environmental Water Samples","authors":"N. Ahmad, F. Omar","doi":"10.7598/cst2019.1486","DOIUrl":"https://doi.org/10.7598/cst2019.1486","url":null,"abstract":"A simple, precise, rapid, and accurate reversed – phase high performance liquid chromatography method has been developed for the determination of paracetamol in pure from, pharmaceutical formulations and environmental water samples. Chromatography was carried out on supelco L1 (C18) reversedphase column (25cm × 4.6mm), 5 microns, using a mixture of acetonitril : buffer pH3.0 (40: 60v/v) as a mobile phase at a flow rate of 1.5 ml.min -1 . Detection was performed at 243nm at ambient temperature. The retention time was found 2.2 minutes. The calibration curve was linear (r= 0.999) over a concentration range from 10 to 100 μg/ml. Limit of detection (LOD) and limit of quantitation (LOQ) were found 3ng/ml and 9 ng/ml respectively. The method was validated for its linearity, precision and accuracy. The proposed method was successfully applied for the determination of paracetamol in pure form, pharmaceutical formulations and in environmental water samples. KEYWORD: HPLC, Paracetamol, Pharmaceutical Formulations, Environmental Water Samples.","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75458157","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}
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