无机化学期刊(英文)Pub Date : 2020-01-20DOI: 10.4236/ojic.2020.101002
Y. B. Amer, Rehab. N. El-daghare, A. Hammouda, R. El-Ferjani, F. Elmagbari
{"title":"Synthesis and Characterization of Cr(III) & Fe(II) Bis(2-Methoxybenzylidene)Biphenyl-4,4'-Diamine Complexes","authors":"Y. B. Amer, Rehab. N. El-daghare, A. Hammouda, R. El-Ferjani, F. Elmagbari","doi":"10.4236/ojic.2020.101002","DOIUrl":"https://doi.org/10.4236/ojic.2020.101002","url":null,"abstract":"Bis(2-methoxybenzylidene)biphenyl-4,4'-diamine Schiff base was prepared by the reaction of benzidine and O-methoxy benzaldehyde 1:2 reaction. Two complexes of this ligand with Cr(III) and Fe(II) were prepared. All prepared compounds were analysed using elemental analysis, IR, 1H NMR and mass spectroscopy. The formation of proposed structures, including the free ligand and complexes were confirmed.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42450895","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 : 2019-09-23DOI: 10.4236/ojic.2019.94004
T. Seck, A. Sy, Djiby Lo, Papa Aly Gaye, M. L. Sall, O. Diouf, M. Diaw, M. Gaye
{"title":"Synthesis, Spectroscopic Studies and X-Ray Diffraction of Heptacoordinated Mn(II) and Co(II) Complexes with Ligands Derived from Carbonohydrazide","authors":"T. Seck, A. Sy, Djiby Lo, Papa Aly Gaye, M. L. Sall, O. Diouf, M. Diaw, M. Gaye","doi":"10.4236/ojic.2019.94004","DOIUrl":"https://doi.org/10.4236/ojic.2019.94004","url":null,"abstract":"The ligand 1-(1-(pyridin-2-yl)ethylidene)carbonohydrazide (H4L1) and 1-(pyridin-2-ylmethylene)carbonohydrazide (H4L2) were prepared by reaction of carbonohydrazide with 2-acetylpyridine or pyridine carbaldehyde respectively in a reflux methanol solution. The complexes are prepared by reaction of the ligand with the appropriate metal salt. These complexes are well characterized by elemental analysis, IR and UV spectroscopies and their structure were determined by single X-ray diffraction technic. In the crystal of the dinuclear complex [Mn2(H4L1)2(H2O)4]·Cl4, 1) each Mn(II) center is seven coordinated by two nitrogen atom and one carbonyl atom of the one ligand and one nitrogen atom and one carbonyl oxygen atom of another ligand molecule. The coordination sphere is completed by two water molecules. Each of the carbonyl oxygen atom acts as bridge between the two Mn(II) centers. In the mononuclear complex [Co(H4L2)(NO3)(H2O)2]·(NO3); 2) the Co(II) center is heptacoordinated. The ligand acts in tridentate fashion through two nitrogen atoms and one carbonyl oxygen atom. Two water molecules lie in the apical positions. One nitrate group acts in bidentate manner while the other nitrate group remains uncoordinated. In both complexes the coordination polyhedral are best described as a pentagonal bipyramid. The molecules are linked together in each case by multiple hydrogen bond interaction resulting in a three-dimensional network. The crystallographic data has been deposited in Cambridge Crystallographic Data Centre [CCDC No. 1944387 (complex 1) and 1944386 (complex 2)].","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43763560","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 : 2019-06-20DOI: 10.4236/OJIC.2019.93003
N. Mominou, M. J. Richard, Sabo Ina Aicha
{"title":"Physicochemical Characterization and Valorization of Clay from Lobo and Ngoya in Cameroon Central Region","authors":"N. Mominou, M. J. Richard, Sabo Ina Aicha","doi":"10.4236/OJIC.2019.93003","DOIUrl":"https://doi.org/10.4236/OJIC.2019.93003","url":null,"abstract":"Two samples clayed materials, LO and NG from central region in Cameroon were characterized for their valorization in the manufacture of refractory bricks and ceramics. In order to assess the technological properties of these clays, cooking tests were carried out on the test specimens at different temperatures. From particle size analysis, clayed materials studied have a spreading particle size and their plasticity index is between 18 and 47. The mineralogical study reveals the presence of Quartz, illite, kaolin, hematite and feldspars. High level of silica content explains the sandy nature of these clays. Linear shrinkage and density increase with temperature while compressive strength decreases with temperature. Analyses performed on the ceramic specimens after firing show that clay materials studied are suitable for the manufacture of refractory bricks.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43887708","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 : 2019-04-28DOI: 10.4236/OJIC.2019.92002
Anderson Dourado Galvão, Fabricio Tarso de Moraes, C. Sousa, Katia Meirelles Duarte de Sousa, Patrícia Gelli Feres de Marchi, A. França, E. L. França, Wagner Batista dos Santos
{"title":"Synthesis and Characterization of a New Compound of Cobalt II with Isonicotinamide and Evaluation of the Bactericidal Potential","authors":"Anderson Dourado Galvão, Fabricio Tarso de Moraes, C. Sousa, Katia Meirelles Duarte de Sousa, Patrícia Gelli Feres de Marchi, A. França, E. L. França, Wagner Batista dos Santos","doi":"10.4236/OJIC.2019.92002","DOIUrl":"https://doi.org/10.4236/OJIC.2019.92002","url":null,"abstract":"In this work, the isonicotinamide was coordinated to the Cobalt ion in oxidation state +2. The relevance of this work is the investigation of the in vitro bactericidal potential of the synthesized complex when tested in Gram-positive and negative bacteria strains. This study is motivated by the need to obtain new materials that have antibiotic properties and that, in the future, may become an effective drug against resistant bacteria. A new coordination compound of Cobalt and isonicotinamide, [Co(H2O)(isn)3](BF4)2, was synthesized and described. The compound was characterized by thermoanalytical techniques TG-DTG and TG-DSC, where it was possible to propose the mechanism of thermal decomposition. Through the spectroscopy in the region of the medium infrared (FTIR), it is possible to infer the site of connection between isonicotinamide and metal. The bactericidal activity of [Co(H2O)(isn)3](BF4)2, CoCl2 and free Isonicotinamide were tested for the bacteria Streptococcus mutans (Gram+) and Escherichia coli (Gram−) and the synthesized compound showed to be sensitive for both bacteria.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44718061","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 : 2019-01-30DOI: 10.4236/ojic.2019.91001
T. S. Celin, G. Raj
{"title":"Micellar Effect on Photoinduced Electron Transfer Reactions of Ruthenium(II) Polypyridyl Complexes with Quinones: Effect of CTAB","authors":"T. S. Celin, G. Raj","doi":"10.4236/ojic.2019.91001","DOIUrl":"https://doi.org/10.4236/ojic.2019.91001","url":null,"abstract":"Photoinduced electron transfer reaction between the excited state ruthenium (II) polypyridyl complexes and quinones has been investigated in cetyltrimethylammonium bromide using luminescent quenching techniques. The complexes have the absorption and emission maximum in the range 452 - 468 nm and 594 - 617 nm respectively. The static nature of quenching is confirmed from the ground state absorption studies. The association constants for the complexes with quinones are calculated from the Benesi-Hildebrand plots using absorption spectral data. The value of quenching rate constant (kq) is highly sensitive to the nature of the ligand and the quencher, the medium, structure and size of the quenchers. Compared to the aqueous medium, the electron transfer rate is altered in CTAB medium. The oxidative nature of the quenching is confirmed by the formation of Ru3+ ion and quinone anion radical.","PeriodicalId":70986,"journal":{"name":"无机化学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47890150","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}