无机化学期刊(英文)Pub Date : 2021-01-25DOI: 10.4236/OJIC.2021.111002
Francis A. Ngounoue Kamga, E. Mainsah, Maurice Kuate, P. Ndifon
{"title":"Synthesis, Characterization and Biological Activities of Binuclear Metal Complexes of 2-Benzoylpyridine and Phenyl(Pyridin-2-yl) Methanediol Derived from 1-Phenyl-1-(Pyridin-2-yl)-N-(Pyrimidin-2-yl) Methanimine Dihydrate Schiff Base","authors":"Francis A. Ngounoue Kamga, E. Mainsah, Maurice Kuate, P. Ndifon","doi":"10.4236/OJIC.2021.111002","DOIUrl":"https://doi.org/10.4236/OJIC.2021.111002","url":null,"abstract":"The Schiff base, 1-phenyl-1-(pyridin-2-yl)-N-(pyrimidin-2-yl)methanimine dihydrate (L1) has been synthesized by the condensation reaction between 2-aminopyrimidine and 2-benzoylpyridine and characterized using 13C-NMR, 1H-NMR, microanalysis, FT-IR, DEPT-135, HSQC, HMBC, COZY, NOESY. The reaction of 1-phenyl-1-(pyridin-2-yl)-N-(pyrimidin-2-yl)methanimine dihydrate (L1) with salts of V(IV), Co(II) and Cu(II), however, resulted in the hydrolysis of L1 to give binuclear metal complexes of 2-benzoylpyridine (L2) and phenyl(pyridin-2-yl)methanediol (L3) which were characterized using UV-visible spectroscopy, and TGA. The single crystal x-ray structure determined for the Copper(II) complex revealed that we obtained a compound previously obtained using a different method of synthesis. The Schiff base ligand (L1) is soluble in methanol, ethanol, DMSO, acetone and DMF. Microanalysis and Spectroscopic studies indicated that binuclear metal complexes were obtained by the coordination of metal ion to 2-benzoylpyridine (L2) and phenyl(pyridin-2-yl)methanediol (L3) from the hydrolysis of L1. Spectroscopic and elemental analysis reveal the formation of square pyramidal complexes of Co(II) and Cu(II) and a square planar complex of V(IV). In vitro antibacterial and antifungal activity against three bacterial strains (Escherichia coli, Klebsiella pneumoniae and Staphylococcus aureus) and three fungal stains (Candida albicans, Candida glabrata and Candida parapsilosis) showed moderate biological activity. Antioxidant studies reveal that only the binuclear Co(II) and oxovanadium(II) complexes are potent to eliminate free radicals.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43282716","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}
无机化学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ojic.2021.104010
Mosaad R. Mlahi, M. Mostafa
{"title":"Structural, Theoretical and Biological Studies of (Z)-3-Amino-N-(3-Amino Pyrazine-2-Carbonyl) Pyrazine-2-Carbohydrazonic Acid (APA; L) and Its Cu2+, Co2+, Pt4+ and Pd2+ Chelates","authors":"Mosaad R. Mlahi, M. Mostafa","doi":"10.4236/ojic.2021.104010","DOIUrl":"https://doi.org/10.4236/ojic.2021.104010","url":null,"abstract":"New chelates derived from the novel ligand, (Z)-3-amino-N-(3-amino pyrazine-2-carbonyl)pyrazine-2-carbohydrazonic acid (APA, L), with Cu 2+ , Co 2+ , Pt 4+ and Pd 2+ salts were investigated. The results suggest that APA acts as mononegative tridentate in the case of Cu 2+ , binegative tetradentate in the case of Co 2+ and as mononegative bidentate towards Pt 4+ and Pd 2+ chelates. The results of the corrected µ eff . and spectral suggest the structures of the isolated chelates. The results of the corrected µ eff . and spectral suggest the geometries of the isolated chelates. Molecular modeling is deduced and chemical reactivity, energy components for chelates and also MEP for APA is illustrated. In Vitro, the SOD and radical scavengers like activity of the synthesized compounds Hep G2 liver cancer cells and cytotoxic activity were checked. Metal chelates show potent anti-oxidative activity. The results of cytotoxic activity assay against hepatocellular carcinoma cell line Hep G2 confirmed that Pt 4+ complex has the highest value, while APA, Cu 2+ , Co 2+ and Pd 2+ chelates have no significant cytotoxic activity.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662708","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}
无机化学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ojic.2021.114009
Phil Lewis Mpampoungou Langama, J. Anguilè, Albert Novy Messi Me Ndong, Adam Bouraima, C. Bissielou
{"title":"Adsorption of Copper (II) Ions in Aqueous Solution by a Natural Mouka Smectite and an Activated Carbon Prepared from Kola Nut Shells by Chemical Activation with Zinc Chloride (ZnCl<sub>2</sub>)","authors":"Phil Lewis Mpampoungou Langama, J. Anguilè, Albert Novy Messi Me Ndong, Adam Bouraima, C. Bissielou","doi":"10.4236/ojic.2021.114009","DOIUrl":"https://doi.org/10.4236/ojic.2021.114009","url":null,"abstract":"","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662367","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}
无机化学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ojic.2021.114010
Mosaad R. Mlahi, M. Mostafa
{"title":"Structural, Theoretical and Biological Studies of (Z)-3-Amino-N-(3-Amino Pyrazine-2-Carbonyl) Pyrazine-2-Carbohydrazonic Acid (APA; L) and Its Cu<sup>2+</sup>, Co<sup>2+</sup>, Pt<sup>4+</sup> and Pd<sup>2+</sup> Chelates","authors":"Mosaad R. Mlahi, M. Mostafa","doi":"10.4236/ojic.2021.114010","DOIUrl":"https://doi.org/10.4236/ojic.2021.114010","url":null,"abstract":"","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662408","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}
无机化学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/OJIC.2021.113004
Youjuan Zhang, Caiwen Zhang, Jing-Tang Chen
{"title":"Synthesis and Characterization of Two Cu(II) Nitronyl Nitroxide Complexes","authors":"Youjuan Zhang, Caiwen Zhang, Jing-Tang Chen","doi":"10.4236/OJIC.2021.113004","DOIUrl":"https://doi.org/10.4236/OJIC.2021.113004","url":null,"abstract":"Two new nitronyl nitroxide Cu(II) complexes {[Cu(hfac) 2 ] 2 (NIT-4PyPh)} 2 (1) and [Cu(hfac) 2 ][(NIT-3PyPh) 2 ](2)(NIT-4PyPh=2-[4-(4-pyridinylmethoxy) phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,NIT-3PyPh=2-[4-(3-p yridinylmethoxy)phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,hfac =hexafluoroacetylacetone), have been synthesized and characterized. The X-ray crystal structure analyses show that structures of the two complexes are different. Complex 1 crystallizes in cyclic metal-radical dimer consisting of four Cu(hfac) 2 and two NIT-4PyPh ligands; four Cu(II) atoms adopt two coordinated modes. In the ring, each Cu(II) ion is hexa-coordinated by four oxygen atoms of two hfac ligands and one oxygen atom (ONCNO) and one nitrogen atom of the pyridinyl group from two different radicals. Outside the ring, each Cu(II) is penta-coordinated by four oxygen atoms of two hfac ligands and one oxygen atom (ONCNO) from the radical ligand. Complex 2 crystallizes in discrete molecule, while the Cu(II) atom is hexa-coordinated by four oxygen atoms of two hfac molecules and two nitrogen atoms of the pyridinyl group from two radical ligands.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662720","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}
无机化学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ojic.2021.114008
M. Mostafa
{"title":"Comparative Studies of Some Novel Cu(II) Polymeric Complexes Derived from Cyanoacetylhydrazine (CAH; L). The Role of Solvents Used on the Structure and Geometry of the Isolated Cu<sup>2+</sup> Complexes","authors":"M. Mostafa","doi":"10.4236/ojic.2021.114008","DOIUrl":"https://doi.org/10.4236/ojic.2021.114008","url":null,"abstract":"","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662355","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}
无机化学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ojic.2021.104009
Phil Lewis Mpampoungou Langama, J. Anguilè, Albert Novy Messi Me Ndong, Adam Bouraima, C. Bissielou
{"title":"Adsorption of Copper (II) Ions in Aqueous Solution by a Natural Mouka Smectite and an Activated Carbon Prepared from Kola Nut Shells by Chemical Activation with Zinc Chloride (ZnCl2)","authors":"Phil Lewis Mpampoungou Langama, J. Anguilè, Albert Novy Messi Me Ndong, Adam Bouraima, C. Bissielou","doi":"10.4236/ojic.2021.104009","DOIUrl":"https://doi.org/10.4236/ojic.2021.104009","url":null,"abstract":"The aim of this work was to test the adsorption efficiency of copper (II) ions in an aqueous solution on Natural Smectite (NS) and Activated Carbon (AC). The experiments carried out in batch mode made it possible to determine the stirring time, the adsorbent mass, the pH, the initial concentration of copper (II) ions, the isotherms and the adsorption kinetics. It appears that the stirring time was 15 minutes for the AC and 20 minutes for the NS. The adsorption was at maximum for the two adsorbents at optimum pH of 3.5 for a mass of 0.05 g each. The quantity of copper (II) ions adsorbed was 26.6 mg/L for NS and 36.6 mg/g for AC of a concentration of 600 mg/L each. The Langmuir isotherm was the one that best described the adsorption process for the two adsorbents. The adsorption kinetics obtained was that of the pseudo second-order for our two adsorbents. The results obtained showed that these two adsorbents were effective for the adsorption of copper (II) ions in an aqueous solution. (II) Ions Aqueous Solution a Natural and an Activated Carbon Prepared from Kola Nut Shells by Chemical Activation with Zinc Chloride (ZnCl 2 ).","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70662647","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}
无机化学期刊(英文)Pub Date : 2020-09-21DOI: 10.4236/OJIC.2020.104006
A. Djoumbissie, Francis W. Njifack, A. T. Djampouo, T. R. Fomuta, Golngar Djimassingar, A. Kuate, J. Ngoune
{"title":"Synthesis and Structural Characterization of a New Two-Dimensional Polymeric Hybrid Material {[Cu3(μ3-1,2,3-BTC)(μ2-1,2,3-BTC)(en)3(OH2)2(OH)(μ2-OH2)]2·5H2O·O}n","authors":"A. Djoumbissie, Francis W. Njifack, A. T. Djampouo, T. R. Fomuta, Golngar Djimassingar, A. Kuate, J. Ngoune","doi":"10.4236/OJIC.2020.104006","DOIUrl":"https://doi.org/10.4236/OJIC.2020.104006","url":null,"abstract":"The reaction of benzene-1,2,3-tricarboxylate copper(II) trihydrate \u0000(Cu3(1,2,3-BTC)2·3H2O) and ethylenediamine (en) gave after recrystallization from methanol at room temperature violet crystalline solid of the polymeric two dimensional material \u0000{[Cu3(μ3-1,2,3-BTC)(μ2-1,2,3-BTC)(en)3(OH2)2(OH)(μ2-OH2)]2·5H2O·O}n (1) as identified by single crystal X-ray diffraction analysis. The compound was also characterized by elemental analysis, FT-IR spectroscopy, UV-vis spectroscopy, thermogravimetric analysis (TGA) and magnetic susceptibility. The molecular structure indicates crystallization in the triclinic space group P-1 with the unit cell parameters a = 12.1205(3) A, b = 12.7026(3) A, c = 13.9890(3) A, α = 75.034(1)°, β = 74.957(1)°, γ = 68.415(1)°. Structural analysis also revealed that the dimeric compound is connected by Cu-O-Cu bridges and the dimer is further converted into a polymeric chain structure through bridging of one benzene-1,2,3-tricarboxylate ligand. Different coordination modes are observed at the copper atom. The Cu atom at the center is octahedral while the two other ones are pentacoordinated. Thermal analysis of the compound showed decomposition processes, while magnetic studies indicated a magnetic susceptibility μ of 3.21 BM.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41271474","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}
无机化学期刊(英文)Pub Date : 2020-07-30DOI: 10.4236/ojic.2020.103004
Sally-Judith E. Ntum, C. Mariam, E. Mainsah, P. Ndifon
{"title":"Synthesis and Crystal Structure of Bis(N’-(Pyridine-3-Carboxaldehyde) Isonicotinoylhydrazone) Zinc(II)","authors":"Sally-Judith E. Ntum, C. Mariam, E. Mainsah, P. Ndifon","doi":"10.4236/ojic.2020.103004","DOIUrl":"https://doi.org/10.4236/ojic.2020.103004","url":null,"abstract":"Zinc complexes of Schiff base ligands exhibit \u0000interesting properties which could be exploited for potential applications as \u0000catalysts and models for biochemical systems. \u0000In this study, we report of the synthesis of a new zinc Schiff base complex, \u0000bis(N’-(pyridine-3-carboxaldehyde) \u0000isonicotinoylhydrazone) zinc(II), which has been characterized by \u0000physico-chemical methods. The X-ray single crystal structure of the complex has \u0000also been determined. The Schiff base ligand is bonded to the metal in a monodentate manner, coordinating \u0000through the pyridine N-atom, as shown from spectral studies. The crystal \u0000structure shows the zinc atom bonded to two Schiff bases and four aqua ligands, with each Schiff base ligand \u0000coordinating through its pyridine N-atom forming a distorted octahedral ZnN2O4 complex. Two water molecules and two nitrate ions found in the crystal \u0000structure link the different monomers through hydrogen bonding to form a \u0000layered supramolecular structure.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46027058","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}
无机化学期刊(英文)Pub Date : 2020-04-30DOI: 10.4236/ojic.2020.102003
A. M. Jabbi, H. Aliyu, S. Isyaku, A. Kabir
{"title":"Preparation, Characterization and Antimicrobial Studies of Mn(II) and Fe(II) Complexes with Schiff Base Ligand Derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline","authors":"A. M. Jabbi, H. Aliyu, S. Isyaku, A. Kabir","doi":"10.4236/ojic.2020.102003","DOIUrl":"https://doi.org/10.4236/ojic.2020.102003","url":null,"abstract":"Schiff \u0000base derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline and \u0000its Mn(II) and Fe(II) complexes were synthesized and characterized by melting \u0000point and decomposition temperature, elemental analysis, molar conductivity, infrared \u0000(IR) spectral analysis, atomic absorption spectroscopy (AAS) analysis, \u0000solubility test, and magnetic susceptibility. The Fourier-transform infrared \u0000spectroscopy (FTIR) spectral data of the Schiff base determined showed a band at 1622 cm−1 and this was \u0000assigned to the v (C=N), which is a feature of azomethine group. The \u0000same band was observed to shift to lower frequencies 1577 and 1599 cm−1 in the complexes suggesting coordination of the Schiff base with the respective \u0000metal(II) ions. Molar conductance \u0000values 14.58 and 12.65 Ω−1∙cm2∙mol−1 show that \u0000the metal complexes were non-electrolyte in nature. The magnetic susceptibility \u0000of the complexes was determined and the gram magnetic susceptibility of the \u0000complexes was found to be positive, revealing that they are paramagnetic. The \u0000elemental analysis of the complexes for C, N and H determined suggested 1:1 \u0000metal to ligand ratio. The result of the antimicrobial studies showed that, the \u0000metal(II) complexes exhibited better antibacterial and antifungal activity than \u0000the Schiff base.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41384444","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}