Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000243
J. Summerfield
In this work the growth of a Li electrode-electrolyte interface in the presence of an elastic prestress is studied. In particular the focus is on Li-air batteries with a solid electrolyte, LIPON. Theoretical studies and experimental evidence show that during the process of charging the battery the replated lithium adds unevenly to the electrode surface. This eventually leads to dendrite formation as the battery is charged and discharged numerous times. This study focusses on the deviation from flatness of the electrode and the surface Green’s function is also developed. It was found that the theoretical formulation is in line with the literature.
{"title":"Using Green's Functions to Understand the Stresses on a Li-air Battery Electrode","authors":"J. Summerfield","doi":"10.4172/2329-6798.1000243","DOIUrl":"https://doi.org/10.4172/2329-6798.1000243","url":null,"abstract":"In this work the growth of a Li electrode-electrolyte interface in the presence of an elastic prestress is studied. In particular the focus is on Li-air batteries with a solid electrolyte, LIPON. Theoretical studies and experimental evidence show that during the process of charging the battery the replated lithium adds unevenly to the electrode surface. This eventually leads to dendrite formation as the battery is charged and discharged numerous times. This study focusses on the deviation from flatness of the electrode and the surface Green’s function is also developed. It was found that the theoretical formulation is in line with the literature.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"673 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76859925","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000258
O. Chidi, Okike U Nnanna, O. Ifedi
This study focuses on the investigation of the capability of surfactant-modified bentonite for removal of phenol from aqueous solution. Calcium bentonite was beneficiated by means of ion exchange method using sodium trioxocarbonate (IV) resulting into sodium exchanged bentonite (SEB) and modified using ion exchange method, impregnation method, mechanical mixing methods using quaternary hexadecyltrimethylammonium bromide (HDTMABr). Fourier Transform Infra-Red Spectroscopy (FTIR) technique was used to study the vibrational bands of the sodium exchanged bentonite and modified SEB respectively. The effects of contact time, pH and initial concentration were studied on SEB and surfactant-modified SEB. The result reveals that the removal of phenol using SEB and surfactant-modified bentonite has optimum pH, contact time and equilibrium adsorption capacity of 6.0, 60 mins and 22.4 mgg-1 respectively. The result further shows that the surfactant-modified bentonite produced by impregnation method gave better experimental and calculated adsorption capacities of 6.4 mgg-1 and 10.5 mgg-1 respectively. The kinetic data obtained fitted well with pseudo second-order equation with correlation coefficient (R2) value of 0.999. This study therefore recommends that surfactant-modified bentonite obtained by means of impregnation is a potential adsorbent for the removal of phenol from aqueous solution and subsequently waste water.
{"title":"The Use of Organophilic Bentonite in the Removal Phenol from Aqueous Solution: Effect of Preparation Techniques","authors":"O. Chidi, Okike U Nnanna, O. Ifedi","doi":"10.4172/2329-6798.1000258","DOIUrl":"https://doi.org/10.4172/2329-6798.1000258","url":null,"abstract":"This study focuses on the investigation of the capability of surfactant-modified bentonite for removal of phenol from aqueous solution. Calcium bentonite was beneficiated by means of ion exchange method using sodium trioxocarbonate (IV) resulting into sodium exchanged bentonite (SEB) and modified using ion exchange method, impregnation method, mechanical mixing methods using quaternary hexadecyltrimethylammonium bromide (HDTMABr). Fourier Transform Infra-Red Spectroscopy (FTIR) technique was used to study the vibrational bands of the sodium exchanged bentonite and modified SEB respectively. The effects of contact time, pH and initial concentration were studied on SEB and surfactant-modified SEB. The result reveals that the removal of phenol using SEB and surfactant-modified bentonite has optimum pH, contact time and equilibrium adsorption capacity of 6.0, 60 mins and 22.4 mgg-1 respectively. The result further shows that the surfactant-modified bentonite produced by impregnation method gave better experimental and calculated adsorption capacities of 6.4 mgg-1 and 10.5 mgg-1 respectively. The kinetic data obtained fitted well with pseudo second-order equation with correlation coefficient (R2) value of 0.999. This study therefore recommends that surfactant-modified bentonite obtained by means of impregnation is a potential adsorbent for the removal of phenol from aqueous solution and subsequently waste water.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"51 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81776946","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000256
Rao Rm, Sastry Csp
One simple and sensitive procedure (UV spectophotometric method) for the assay of two drugs namely terbinafine hydrochloride and clarithromycin in pure form and formulations. This method involves the formation of ion-association complex between TRB or CAM and the picric acid. In order to establish the optimum conditions necessary for rapid and quantitative formation of coloured product with maximum stability and sensitivity, the author performed experiments by measuring the absorbance at λmax 350 nm of a series of solutions, varying one and fixing the other parameters in each case such as type, volume and concentration of acid, organic solvent used for extraction, ratio of organic phase to aqueous phase during extraction, shaking time and temperature. The variable parameters were optimized. The results were statistically validated.
{"title":"UV Spectrophotometric Analysis of Drugs Terbinafine Hydrochloride and Clarithromycin","authors":"Rao Rm, Sastry Csp","doi":"10.4172/2329-6798.1000256","DOIUrl":"https://doi.org/10.4172/2329-6798.1000256","url":null,"abstract":"One simple and sensitive procedure (UV spectophotometric method) for the assay of two drugs namely terbinafine hydrochloride and clarithromycin in pure form and formulations. This method involves the formation of ion-association complex between TRB or CAM and the picric acid. In order to establish the optimum conditions necessary for rapid and quantitative formation of coloured product with maximum stability and sensitivity, the author performed experiments by measuring the absorbance at λmax 350 nm of a series of solutions, varying one and fixing the other parameters in each case such as type, volume and concentration of acid, organic solvent used for extraction, ratio of organic phase to aqueous phase during extraction, shaking time and temperature. The variable parameters were optimized. The results were statistically validated.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"26 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89279228","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000251
O. Chidi, I. Adebayo
The uncontrolled distribution of surfactants which are commonly used as household and industrial products like soaps, lubricants and detergents in the global market have provoked this study. The determination of critical micelle concentration (CMC) of glycerol monostearate surfactant (GMS) was evaluated using Conductivity and UV-Visible Spectroscopic techniques respectively. The effect of solubility was quantified and the Krafft temperature was obtained. The thermodynamic feasibility parameters were evaluated using Erying and Vant Hoff’s equations. The CMC values were taken from the sharp breaks in the plots of absorbance versus surfactant concentrations and conductivity versus surfactant concentration respectively. The result showed that as the temperature increases, the CMC initially decreases and then followed by slight increase owing to the smaller probability of hydrogen bond formation at higher temperatures. The result showed that the critical micelle concentration of GMS obtained using Conductivity and UV-Visible techniques were 4.50 × 10-2 and 2.40 × 10-2 moldm-3 respectively and the Krafft temperature (KT) was obtained at 50°C. The Gibbs free energy change of micellization (ΔG° CMC) was found to decrease as temperature increases over the whole temperature range. The entropy change of micellization (ΔS° (CMC)) showed positive values throughout the temperature range tested while the large enthalpy change, ΔH° (CMC) means that in the micellization process, the attractive interaction among hydrophobic chains was opposed by the strong interaction of the oxyethylene chains of glycerol monostearate with water molecules. The study revealed that the use of UV-Visible Spectroscopy technique was a very good and easy way of determining the critical micelle concentration of GMS. This study is also a valuable industrial tool for the production of soap related products and its applications in domestic and industrial processes.
{"title":"Determination of Critical Micelle Concentration and Thermodynamic Evaluations of Micellization of GMS","authors":"O. Chidi, I. Adebayo","doi":"10.4172/2329-6798.1000251","DOIUrl":"https://doi.org/10.4172/2329-6798.1000251","url":null,"abstract":"The uncontrolled distribution of surfactants which are commonly used as household and industrial products like soaps, lubricants and detergents in the global market have provoked this study. The determination of critical micelle concentration (CMC) of glycerol monostearate surfactant (GMS) was evaluated using Conductivity and UV-Visible Spectroscopic techniques respectively. The effect of solubility was quantified and the Krafft temperature was obtained. The thermodynamic feasibility parameters were evaluated using Erying and Vant Hoff’s equations. The CMC values were taken from the sharp breaks in the plots of absorbance versus surfactant concentrations and conductivity versus surfactant concentration respectively. The result showed that as the temperature increases, the CMC initially decreases and then followed by slight increase owing to the smaller probability of hydrogen bond formation at higher temperatures. The result showed that the critical micelle concentration of GMS obtained using Conductivity and UV-Visible techniques were 4.50 × 10-2 and 2.40 × 10-2 moldm-3 respectively and the Krafft temperature (KT) was obtained at 50°C. The Gibbs free energy change of micellization (ΔG° CMC) was found to decrease as temperature increases over the whole temperature range. The entropy change of micellization (ΔS° (CMC)) showed positive values throughout the temperature range tested while the large enthalpy change, ΔH° (CMC) means that in the micellization process, the attractive interaction among hydrophobic chains was opposed by the strong interaction of the oxyethylene chains of glycerol monostearate with water molecules. The study revealed that the use of UV-Visible Spectroscopy technique was a very good and easy way of determining the critical micelle concentration of GMS. This study is also a valuable industrial tool for the production of soap related products and its applications in domestic and industrial processes.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"1 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89485889","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000255
R. N. Yadav, B. Banik
Oxidation of the alkene group of eugenol by various reagents and solvents is investigated. This method is used for a simple synthesis of eugenol epoxide in excellent yield.
研究了不同试剂和溶剂对丁香酚烯烃基团的氧化作用。该方法简便地合成了环氧丁香酚，收率高。
{"title":"Studies on Natural Products: A Facile Epoxidation of Eugenol","authors":"R. N. Yadav, B. Banik","doi":"10.4172/2329-6798.1000255","DOIUrl":"https://doi.org/10.4172/2329-6798.1000255","url":null,"abstract":"Oxidation of the alkene group of eugenol by various reagents and solvents is investigated. This method is used for a simple synthesis of eugenol epoxide in excellent yield.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"80 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76505559","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000249
Hengli Wang, C. Wang
The title compound, allantoin was first isolated from the acetyl acetate fraction of Portulaca oleracea seed and characterized by 1H-NMR and 13C-NMR. The analgesic activity of allantoin was assessed in acetic acid-induced writhing test in mice with i.p. injection. The results of the research indicated that the analgesic activity of allantoin was similiar to that of aspirine. After administrated of allantoin regularly and repeatedly, the mice did not reveal addiction phenomenon. Allantoin could be further studied as a promising analgesic drug.
{"title":"Isolation, Characterization and Analgesic Activity of Natural Allantoin from Portulaca oleracea Seed","authors":"Hengli Wang, C. Wang","doi":"10.4172/2329-6798.1000249","DOIUrl":"https://doi.org/10.4172/2329-6798.1000249","url":null,"abstract":"The title compound, allantoin was first isolated from the acetyl acetate fraction of Portulaca oleracea seed and characterized by 1H-NMR and 13C-NMR. The analgesic activity of allantoin was assessed in acetic acid-induced writhing test in mice with i.p. injection. The results of the research indicated that the analgesic activity of allantoin was similiar to that of aspirine. After administrated of allantoin regularly and repeatedly, the mice did not reveal addiction phenomenon. Allantoin could be further studied as a promising analgesic drug.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"47 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76112980","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000264
Charles Io, Martin Io, I. Gn, Obuzor Gu
This research work is a novel effort towards studying the effect of quarry activities on: concentration of heavy metals in the soil around two quarry sites and leaves of Telfairia occidentalis and Amaranthus spinosus as well as health risk assessment indices and diseases suffered by the dwellers around the quarry sites in Abia State, Nigeria. Geo-accumulation index (Igeo) rating indicated that all topsoil samples analyzed ranged from practically uncontaminated to moderately contaminate for most heavy metals except for nickel which was extremely polluted within 200 m around the quarry sites and arsenic which were strongly polluted within 100 m around the quarry sites. Contamination factor assessment implicated high level of contamination of the soil sample with lead. Other heavy metals studied showed low degree of contamination at points X and Y for the both quarry sites. The concentrations of the various metals also showed a wide range of variation in leaves with variable patterns in the order: Zn>Cu>Pb>Cr>Ni>Cd>As>Hg; Telfairia occidentalis and Zn>Cu>Pb>Cr>Ni>Cd>As>Hg; Amaranthus spinosus leaves. The bioaccumulation factor (BF) of the eight heavy metals in Amaranthus spinosus and Telfairia occidentalis revealed that these vegetables around both sites were poor accumulators of of the heavy metals studied. The daily intake of heavy metals ascribed to the consumption of the vegetables studied indicated low risk for humans as direct consumers. Comparing the health risk assessment parameters with standards from WHO, total agreement could not be obtained as some values beyond the allowable limit of the WHO standards were portrayed as safe level by the health risk assessment parameters.
{"title":"Health Risk Assessment Indices and Diseases Suffered by the Dwellers around Asphalt Quarry Sites in Abia State, Nigeria","authors":"Charles Io, Martin Io, I. Gn, Obuzor Gu","doi":"10.4172/2329-6798.1000264","DOIUrl":"https://doi.org/10.4172/2329-6798.1000264","url":null,"abstract":"This research work is a novel effort towards studying the effect of quarry activities on: concentration of heavy metals in the soil around two quarry sites and leaves of Telfairia occidentalis and Amaranthus spinosus as well as health risk assessment indices and diseases suffered by the dwellers around the quarry sites in Abia State, Nigeria. Geo-accumulation index (Igeo) rating indicated that all topsoil samples analyzed ranged from practically uncontaminated to moderately contaminate for most heavy metals except for nickel which was extremely polluted within 200 m around the quarry sites and arsenic which were strongly polluted within 100 m around the quarry sites. Contamination factor assessment implicated high level of contamination of the soil sample with lead. Other heavy metals studied showed low degree of contamination at points X and Y for the both quarry sites. The concentrations of the various metals also showed a wide range of variation in leaves with variable patterns in the order: Zn>Cu>Pb>Cr>Ni>Cd>As>Hg; Telfairia occidentalis and Zn>Cu>Pb>Cr>Ni>Cd>As>Hg; Amaranthus spinosus leaves. The bioaccumulation factor (BF) of the eight heavy metals in Amaranthus spinosus and Telfairia occidentalis revealed that these vegetables around both sites were poor accumulators of of the heavy metals studied. The daily intake of heavy metals ascribed to the consumption of the vegetables studied indicated low risk for humans as direct consumers. Comparing the health risk assessment parameters with standards from WHO, total agreement could not be obtained as some values beyond the allowable limit of the WHO standards were portrayed as safe level by the health risk assessment parameters.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"1 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76298015","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000252
R. Thangam, Balaji Gl, P. Ramanathan
The novel synthesis of benzohydrazide derivatives were synthesized by condensation reaction of 4- (tosylamino)benzohydrazide and substituted benzaldehyde. The synthesized compounds were characterized by IR, NMR and Mass spectral analysis. The benzohydrazide derivatives 1-4 were tested for antibacterial and antifungal activities. HOMO-LUMO analysis were carried out theoretically using Gaussian-03 package at DFT/B3LYP/6_31G (d, p) method. Dipole moment (D), polarisability (α), and hyperpolarisability (β) values show that the synthesized molecules possess electronic properties.
{"title":"Synthesis, Spectral Characterization, Antimicrobial and Theoretical Calculation of Some 4-(tosylamino)benzohydrazide Derivatives","authors":"R. Thangam, Balaji Gl, P. Ramanathan","doi":"10.4172/2329-6798.1000252","DOIUrl":"https://doi.org/10.4172/2329-6798.1000252","url":null,"abstract":"The novel synthesis of benzohydrazide derivatives were synthesized by condensation reaction of 4- (tosylamino)benzohydrazide and substituted benzaldehyde. The synthesized compounds were characterized by IR, NMR and Mass spectral analysis. The benzohydrazide derivatives 1-4 were tested for antibacterial and antifungal activities. HOMO-LUMO analysis were carried out theoretically using Gaussian-03 package at DFT/B3LYP/6_31G (d, p) method. Dipole moment (D), polarisability (α), and hyperpolarisability (β) values show that the synthesized molecules possess electronic properties.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"22 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85264747","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000244
Kristen Brown, M. Gilmore, Monica L. Dillihunt, Kendra Minor
2Department of Curriculum and Instruction, College of Education, University of Alabama, Huntsville, Alabama 35899, USA 3Department of Online Learning, University of Alabama, Huntsville, Alabama 35899, USA *Corresponding author: Malinda Wilson Gilmore, Department of Physics, Chemistry and Mathematics, College of Engineering, Technology and Physical Sciences, Alabama Agricultural and Mechanical University, Normal, Alabama 35762, USA, Tel: 7138227879; E-mail: malinda.gilmore@gmail.com
2阿拉巴马大学教育学院课程与教学系，阿拉巴马州亨茨维尔35899;3阿拉巴马大学在线学习系，阿拉巴马州亨茨维尔35899 *通讯作者:Malinda Wilson Gilmore，阿拉巴马农业与机械大学工程、技术与物理科学学院物理、化学与数学系，阿拉巴马州35762，电话:7138227879;电子邮件:malinda.gilmore@gmail.com
{"title":"Utilizing Online Technology to Effectively Teach Chemistry in Secondary Education","authors":"Kristen Brown, M. Gilmore, Monica L. Dillihunt, Kendra Minor","doi":"10.4172/2329-6798.1000244","DOIUrl":"https://doi.org/10.4172/2329-6798.1000244","url":null,"abstract":"2Department of Curriculum and Instruction, College of Education, University of Alabama, Huntsville, Alabama 35899, USA 3Department of Online Learning, University of Alabama, Huntsville, Alabama 35899, USA *Corresponding author: Malinda Wilson Gilmore, Department of Physics, Chemistry and Mathematics, College of Engineering, Technology and Physical Sciences, Alabama Agricultural and Mechanical University, Normal, Alabama 35762, USA, Tel: 7138227879; E-mail: malinda.gilmore@gmail.com","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"155 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86789505","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}
Pub Date : 2018-01-01DOI: 10.4172/2329-6798.1000260
Melaku Meshesha Tulu, Ali Yimer
The title metal complexes were found to be crystalline which have been characterized by elemental analysis, electrical conductivity, magnetic susceptibility measurements, and spectral techniques viz, UV-Visible, FT-IR and NMR (1H-NMR and 13C-NMR). These complexes were air-stable, with high melting points and were soluble in methanol and some other organic solvents such as n-hexane, diethylether and DMSO. The molar conductance of 1 × 10-3 M solutions of the metal complexes in methanol at 27°C indicates that they behave as electrolytes. Both Cobalt(II) and Nickel(II) complexes of N-benzylideneaniline ligand show paramagnetic nature. The electronic studies along with magnetic data suggest a square planer geometry for both Co(II) and Ni(II) complexes. The peak in FT-IR spectra at 1627 cm-1 confirmed the υ(C=N) stretching vibration found in the free ligand. This band was shifted to a lower frequency (1603.5 cm-1) in the spectra of the metal complexes and it confirms the participation of azomethine nitrogen in the coordination of metal ions. Finally, the metal complexes were screened for their catalytic activity in the phenol benzoylation reaction and found to be moderately active.
{"title":"Catalytic Studies on Schiff Base Complexes of Co(II) and Ni(II) Using Benzoylation of Phenol","authors":"Melaku Meshesha Tulu, Ali Yimer","doi":"10.4172/2329-6798.1000260","DOIUrl":"https://doi.org/10.4172/2329-6798.1000260","url":null,"abstract":"The title metal complexes were found to be crystalline which have been characterized by elemental analysis, electrical conductivity, magnetic susceptibility measurements, and spectral techniques viz, UV-Visible, FT-IR and NMR (1H-NMR and 13C-NMR). These complexes were air-stable, with high melting points and were soluble in methanol and some other organic solvents such as n-hexane, diethylether and DMSO. The molar conductance of 1 × 10-3 M solutions of the metal complexes in methanol at 27°C indicates that they behave as electrolytes. Both Cobalt(II) and Nickel(II) complexes of N-benzylideneaniline ligand show paramagnetic nature. The electronic studies along with magnetic data suggest a square planer geometry for both Co(II) and Ni(II) complexes. The peak in FT-IR spectra at 1627 cm-1 confirmed the υ(C=N) stretching vibration found in the free ligand. This band was shifted to a lower frequency (1603.5 cm-1) in the spectra of the metal complexes and it confirms the participation of azomethine nitrogen in the coordination of metal ions. Finally, the metal complexes were screened for their catalytic activity in the phenol benzoylation reaction and found to be moderately active.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"18 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90663916","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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