JOURNAL OF ADVANCES IN CHEMISTRY最新文献

{"title":"INVESTIGATION THE OLIGOMERIZATION PROCESS OF HEXENE-1","authors":"Shahla Alizade, I. Jamal, A. Ali, AliyevFariz Ramik","doi":"10.24297/JAC.V14I1.6455","DOIUrl":"https://doi.org/10.24297/JAC.V14I1.6455","url":null,"abstract":"In article for oligomerization and alkylation processes, to obtain a useful and highly stable active catalyst, New Catalytic Complex (NCC) synthesized which is based on aluminum metal using C2H4Cl2 and this complex has shown high stability in alkylation, oligomerization processes compared to other aluminum-containing catalysts. It is difficult to regulate the molecular mass distribution of received products during oligomerization, either Intensificate the oligomerization process of olefins that is why this process take place in presence of obtaining of bimetal catalytic complex with a highly stable activity from the modification of the New Catalytic Complex(NCC) with transition metal chloride. Comparatively studied oligomerization of Hexen-1 in present of new bimetallic catalytic complex which was modified by NCC and chromium salt (NCC/CrCl3), effect of temperature, reaction time, concentration of the catalyst and the proportion of catalyst components (Al:Cr) in the process was investigated.It was determined that at the initial time (10 min) conversion hexene-1 and the yield of purposeful oil fraction were low. Increasing time, conversion rate of Hexen-1 increases and the optimal time for the process is considered as 60 minutes. In low concentrations of catalyst (0,1-0,3)  oligomerization of hexene-1 is low but in high concentrations(>1%) reaction goes with high rate, at optimal concentration 0,5% mass both the yield of oil fraction and its chemical-physical properties were high.In oligomerization process investigated  ratio effect of catalyst components Al: Cr that was used  Al: Cr=(4-32):1 mol.It has been revealed that oligomerization of Hexen-1, at low mol ratio of components (4:1), received yield of oligomer fraction decreases while mol ratio increases (16:1, 32:1).Studies determined that bimetallic complex at 8:1 mole has shown the maximal activity in  oligomerization process of Hexen-1.The effect of the temperature on the oligomerization process was studied in the range of 30-60oC, increasing the temperature up to 50 °C has a positive effect on the course of the process and despite providing complete oligomerization of hexene-1 its also providing increasing the amount of oil fractions with high viscosity. According to the researches, the optimal conditions for the oligomerization process of hexene-1 with the participation of the bimetallic catalytic complex: reaction time – 60 min., concentration of catalyst – 0,5 % by wt., mol ration of components Al:Cr = 8:1, temperature – 50 °C. In known optimal condition its possible to obtain oligomers with physical indications, characterized by narrow molecular mass distribution, by new catalytic complex that was modified by chromium salt.Such products have special importance, as low-freezing, high viscosity index qualitative engine oils.Synthesis of bimetallic catalytic complexes, with their presence in oligomerization of olefins and fractions, opens wide range perspectives in synthesis of different ","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"47 1","pages":"6041-6045"},"PeriodicalIF":0.0,"publicationDate":"2017-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80445138","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":"Artificial Neural Network Approach to Modeling of Polypropylene Reactor","authors":"Peter Karas, S. Kozák","doi":"10.5121/IJAC.2017.3401","DOIUrl":"https://doi.org/10.5121/IJAC.2017.3401","url":null,"abstract":"","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"50 1","pages":"01-14"},"PeriodicalIF":0.0,"publicationDate":"2017-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89668254","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":"Mathematical Modeling of Adsorption of Co2+ Ions on Sugarcane Bagasse","authors":"H. Taouil","doi":"10.24297/JAC.V14I1.6277","DOIUrl":"https://doi.org/10.24297/JAC.V14I1.6277","url":null,"abstract":"The main objective of this work is to study the mathematical modeling of the adsorption of Co2+ ions on sugarcane bagasse (SCB) for approximate the nature of the adsorption. The together of results obtained show that the adsorption process is favorable for a chemisorption and monolayer. Also, the adsorption process is expressed by the second order kinetic law. Thus the negative values of I”G° and the positive values of I”H° opt for an endothermic and spontaneous process. Also, the positive values of I”S° indicate the increase in the randomness at the solid / liquid interface during the adsorption of the Co2+ metal ions.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"1 1","pages":"6033-6040"},"PeriodicalIF":0.0,"publicationDate":"2017-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88599444","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":"Electrochemical and Spectrastudies of Some Sulfa Drug Azodyes and Their Metal Complexes in Aqueous Solution","authors":"E. Mabrouk, Kh.A.Al Omary, A. Omary, E. El-Mossalamy","doi":"10.24297/JAC.V14I1.6316","DOIUrl":"https://doi.org/10.24297/JAC.V14I1.6316","url":null,"abstract":"The electrochemical behavior of some azo compounds derived from sulfa drugs derivatives in B.R. buffer solutions of different pH containing 20 (v/v) ethanol was investigated at the mercury  electrode using different techniques (DC,DPP,CV and Coulometry) to investigate the effect of medium on the electro reduction process and suggestion the electrode reaction mechanism. The obtained results denoted that these compounds were reduced undergo a single irreversible 4- electron polarographic wave in acid and neutral solutions which represent the cleavage of the N=N center to the amine stage, whereas in alkaline solution, two wave are obtained the second is 2-electron irreversible wave corresponding to the reduction ofCHO group to CH2OH. The DPP and CV data showed a single peak in solutions of pH< 8, whereas three peaks are in alkaline solutions. The dissociation constants of the investigated compounds were determined by using spectrophotometric and potentiometric methods. Also the metal – ligand formation constants were determined potentiometrically and found in the order Cu˃ Co˃ Ni ˃Zn.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"39 1","pages":"6021-6032"},"PeriodicalIF":0.0,"publicationDate":"2017-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83573672","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 and characterization of some new ruthenium (II) complexes as photosensitizers in dye-sensitized solar cells","authors":"A. Osman, W. El-said, M. Abdel-Shakour","doi":"10.24297/JAC.V12I5.6265","DOIUrl":"https://doi.org/10.24297/JAC.V12I5.6265","url":null,"abstract":"New ruthenium (II) complexes, [Ru(DHZ) 2 (bpy)], [Ru(SCN) 2 (bpy)(DMSO) 2 ], [Ru(SCN) 2 (dmbpy)(DMSO) 2 ] and H 2 [RuCl 2 (salen)], where bpy = 2,2'- bipyridine, DHZ = 1,5-diphenylthiocarbazone, dmbpy = 4,4'-dimethyl-2,2' bipyridine and salen = 2,2'- ethylenebis(nitrilomethylidene)diphenol were synthesized and characterized by elemental analysis, FTIR, UV-Vis spectroscopy and thermal analysis. From data of these investigations the structural formula and the mode of bonding were obtained. These complexes were successfully applied to sensitization of nano-crystalline TiO 2 based solar cells (DSSCs). The photovoltaic efficiencies of the studied DSSCs increase  in the following order [Ru(DHZ) 2 (bpy)]< [Ru(SCN) 2 (bpy)(DMSO) 2 ]< [Ru(SCN) 2 (dmbpy)(DMSO) 2 ]< H 2 [RuCl 2 (salen)]. This increase is in agreement with the light harvesting of these complexes as indicated from their absorption spectra. Ferrioxalate complex enhanced the performance of some investigated cells. Therefore, a mechanism of this improvement has been postulated. Polyaniline, as well as iodine doped polyaniline modified FTO electrode has been tested as promising counter electrodes. The efficiencies of the cells using iodine doped polyaniline is higher than that of polyaniline, which is assignable to the high conductivity of iodine. New ruthenium (II) complexes, [Ru(DHZ) 2 (bpy)], [Ru(SCN) 2 (bpy)(DMSO) 2 ], [Ru(SCN) 2 (dmbpy)(DMSO) 2 ] and H 2 [RuCl 2 (salen)], where bpy = 2,2'- bipyridine, DHZ = 1,5-diphenylthiocarbazone, dmbpy = 4,4'-dimethyl-2,2' bipyridine and salen = 2,2'- ethylenebis(nitrilomethylidene)diphenol were synthesized and characterized by elemental analysis, FTIR, UV-Vis spectroscopy and thermal analysis. From data of these investigations the structural formula and the mode of bonding were obtained. These complexes were successfully applied to sensitization of nano-crystalline TiO 2 based solar cells (DSSCs). The photovoltaic efficiencies of the studied DSSCs increase  in the following order [Ru(DHZ) 2 (bpy)]< [Ru(SCN) 2 (bpy)(DMSO) 2 ]< [Ru(SCN) 2 (dmbpy)(DMSO) 2 ]< H 2 [RuCl 2 (salen)]. This increase is in agreement with the light harvesting of these complexes as indicated from their absorption spectra. Ferrioxalate complex enhanced the performance of some investigated cells. Therefore, a mechanism of this improvement has been postulated. Polyaniline as well as iodine doped polyaniline modified FTO electrode has been tested as promising counter electrodes. The efficiencies of the cells using iodine doped polyaniline is higher than that of polyaniline, which is assignable to the high conductivity of iodine.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"55 1","pages":"4413-4425"},"PeriodicalIF":0.0,"publicationDate":"2017-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84873173","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 , spectroscopic characterization and biological study of some new Schiff bases based on 2-hydroxybenzadehyde","authors":"S. Abdelnabi, Chasib Khaiber Bkhakh, M. Y. Kadhum","doi":"10.24297/JAC.V13I12.6117","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6117","url":null,"abstract":"Four new Schiff bases were synthesized from condensation of aldehyde ( 2-hydroxy benzaldehyde ) with aromatic amines (4-introaniline ; 4,4-oxydianiline ; 4,4-diaminodipleny sulfone and sulfanilamide) . These Schiff bases were characterized by IR, NMR , GC. mass and element analysis. Moreover, the Schiff bases were screened for their antibacterial and antifungal activity against various microorganisms and compared with standard compounds. In general , the results were indicated that some Schiff bases had good antimicrobial activity.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"79 1","pages":"5995-6005"},"PeriodicalIF":0.0,"publicationDate":"2017-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80347673","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":"Design, Molecular Modeling and Synthesis of Some New Purine-diones and Pyridopyrimidine-diones with Anticancer Activity","authors":"A. Hayallah","doi":"10.24297/JAC.V13I12.6043","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6043","url":null,"abstract":"An olomoucine analogues of 2-[(1-substituted)-2,6-dioxo-2,3,6,7–tetrahydro-1H-purin-8-ylsulfanyl]-N-substituted acetamide 6a-g and 7a-g, 1-substituted-8-[2-(4-substituted phenyl)-2-oxoethylsulphanyl]-3,7-dihydro-1H-purine-2,6-diones 9a-g and 10a-g, 3-(2-substituted benzyl)-6-(4-substituted phenyl)-1H-thiazolo[2,3-f]purine-2,4-dione 11a-g and 12a-g and their isosteres 3-substituted benzyl-5-methyl-7-substituted-1H-pyrido[2,3-d]pyrimidine-2,4-dione 13a-c and 14a-c were designed and synthesized. The target compounds 11a-g and 12a-g were prepared by cyclodehydration of 9a-g and 10a-g in PPA, while 13a-c and 14a-c were synthesized by condensation of 6-amino-3-(2-substituted benzyl)-1H-pyrimidine-2,4-dione 1a or 1b and the appropriate acylacetone in glacial acetic acid. Structures of the new compounds were verified on the basis of their IR, 1H NMR, MS, HRMS and elemental analyses. The newly synthesized compounds were tested for their anticancer activity and most of the tested compounds showed good to excellent inhibition activity against the tested human breast cancer cell line MCF-7 in comparison to doxorubicin as a reference drug. \u0000KEYWORDS: olomoucine; cyclin-depenent kinase; synthesis; anticancer","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"1 1","pages":"5959-5976"},"PeriodicalIF":0.0,"publicationDate":"2017-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83751574","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":"Oxidative cyclisation and methylene insertion in 1,3-indandione derivatives .The mechanistic studies","authors":"N. D. Zargar","doi":"10.24297/JAC.V13I12.6193","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6193","url":null,"abstract":"Dimethyl sulphoxide activated by acetic-anhydride introduces methylthiomethyl group into phenols,oxidises certain medicinally useful secondary alcohols to their corresponding ketones and brings about oxidative rearrangements in different substrates.It converts 4-hydroxy coumarins and dicoumarols,under varying conditions,to a variety of products of both pharmaceutical and mechanistic interest. \u0000When1,3-indandione (1) was interacted with this versatile reagent at water bath temperature,it  afforded an ylide (2) and an oxidative cyclisation product (3).However,its interaction with Ar –CH = (CN)R,leads to the formation of a mechanistically interesting compound,indeno[1,2-b]-4H pyran(4).   \u0000DMSO alone has been used as a reagent and yields a number of products of mechanistic interest with different substrates.When 1,3-indandione (1) was refluxed with DMSO alone at elevated temperature,it results the formation of poly(methylene-bis) 1,3-indandione(5) involving methylene group insertion between different 1,3-indandione moieties.Methylene insertion has also been observed when 1,3-indandione (1) was condensed with formaldehyde in presence of alkali carbonates or primary amines to yield (6)and(7) respectively.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"119 1","pages":"5989-5994"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80357672","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":"Regioselective Green Synthesis and Antimicrobial properties of full fused non mixed Heterocyclic Systems","authors":"A. El‐sayed, M. El-hashash, S. Rizk","doi":"10.24297/JAC.V13I12.6188","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6188","url":null,"abstract":"One pot synthesis and reaction of triazinthione and triazinohydrazide derivatives with different electrophilic reagents in ordered to synthesis of some interesting non-mixed heterocyclic compounds. Structures of thiazolotriazine, triazolotriazine, pyrimidinyltriazine, and triazinotriazine derivatives were established via spectroscopic data and elemental analysis. The synthesized compounds were screened for their antimicrobial activity.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"66 1","pages":"6006-6020"},"PeriodicalIF":0.0,"publicationDate":"2017-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80217888","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":"Ultrasonic and solvent free Synthesis of Regioselective Diastereomeric Adducts and Heterocyclic Products as antibacterial agent","authors":"A. El‐sayed, A. Maher, El Hashash, S. Rizk","doi":"10.24297/JAC.V13I12.6152","DOIUrl":"https://doi.org/10.24297/JAC.V13I12.6152","url":null,"abstract":"Oxirane ring containing the carboxylic group in the I±,I²-position are useful intermediates in the synthesis of biologically active compounds. Epoxidation of 4-(4-acetylamino and/or bromophenyl)-4-oxo-but-2-enoic acids via ultrasound condition afforded I±-oxirane carboxylic acid followed by regioselective diastereomeric adducts of camphor. The steric factor plays an important role in regioselectivity. Formation of oxirane and furan derivatives via ultrasonic condition was considered as key steps for synthesis of some important heterocyclic compounds. The structure of new synthesized compounds 2-9a,b were elucidated by elemental analysis and spectroscopic data. The antibacterial activity for the synthesized compounds was evaluated.","PeriodicalId":14904,"journal":{"name":"JOURNAL OF ADVANCES IN CHEMISTRY","volume":"48 1","pages":"5977-5988"},"PeriodicalIF":0.0,"publicationDate":"2017-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74992216","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}