European journal of chemistry (Print)最新文献_第6页

Liquid-liquid extraction of zirconium(IV) from sulphuric acid medium using a binary mixture of tri-n-octylamine and Cyanex923 in kerosene 用煤油中三正辛胺和Cyanex923的二元混合物从硫酸介质中液-液萃取锆（IV）

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.273-278.2273

Amit Sahoo, Jaykishon Swain, B. Bhatta

引用次数: 0

X-ray crystal structure analysis of N'-acetyl-N'-phenyl-2-naphthohydrazide N'-乙酰-N'-苯基-2-萘酰肼的x射线晶体结构分析

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.253-258.2235

Varun Sharma, I. Karmakar, G. Brahmachari, V. Gupta

引用次数: 0

Electronic band structure of Bi5O7NO3 and its methyl orange removal mechanism Bi5O7NO3的电子能带结构及其甲基橙去除机理

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.337-350.2297

Eshraq Ahmed Abdullah

{"title":"Electronic band structure of Bi5O7NO3 and its methyl orange removal mechanism","authors":"Eshraq Ahmed Abdullah","doi":"10.5155/eurjchem.13.3.337-350.2297","DOIUrl":"https://doi.org/10.5155/eurjchem.13.3.337-350.2297","url":null,"abstract":"A detailed study of the electronic band structures and partial density of states of Bi5O7NO3 with different exchange correlation functionals was performed using the generalized gradient approximation. Bi5O7NO3 has two direct energy gap transitions of 2.84 and 3.66 eV at the experimental lattice parameters, revealing a semiconductor characteristic of a crystal. Molecular Mechanics; however, tends to underestimate the band-gap energies with indirect characters. This deviation is due to the slight decrease in the cell edges and the significant increase in the β angle during the optimization process. The mechanism of removal of methyl orange and its derivatives by the Bi5O7NO3 unit cell, which has the same experimental UV-Vis band gap, was later investigated through a DMol3 module. To do that, frontier molecular orbitals, global reactivity parameters, and electrostatic potential surface maps were evaluated. The high values of the electrophilicity indexes hint that the dyes are more reactive and can work as good electrophile species. A molecular packing of dye molecules and the ionic natural of Bi5O7NO3 generate a synergistic effect between π-π stacking, anion-π stacking, cation-π stacking and electrostatic interactions, which are thought to be the driven forces during dye removal.","PeriodicalId":89364,"journal":{"name":"European journal of chemistry (Print)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47655487","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}

引用次数: 0

Synthesis, characterization, and biological activity of Cu(II), Ni(II), and Zn(II) complexes of a tridentate heterocyclic Schiff base ligand derived from thiosemicarbazide and 2-benzoylpyridine 由硫代氨基脲和2-苯甲酰吡啶衍生的三齿杂环席夫碱配体Cu(II)、Ni(II)和Zn(II)配合物的合成、表征和生物活性

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.299-306.2280

Line Edwige Tsakeng Ngoudjou, A. Paboudam, A. P. Yepseu, Maurice Kuate, G. Doungmo, P. Ndifon

{"title":"Synthesis, characterization, and biological activity of Cu(II), Ni(II), and Zn(II) complexes of a tridentate heterocyclic Schiff base ligand derived from thiosemicarbazide and 2-benzoylpyridine","authors":"Line Edwige Tsakeng Ngoudjou, A. Paboudam, A. P. Yepseu, Maurice Kuate, G. Doungmo, P. Ndifon","doi":"10.5155/eurjchem.13.3.299-306.2280","DOIUrl":"https://doi.org/10.5155/eurjchem.13.3.299-306.2280","url":null,"abstract":"Ni(II), Cu(II), and Zn(II) complexes of the tridentate heterocyclic ligand, 2-(phenyl(pyridin-2-yl)methylene)hydrazine-1-carbothioamide (HL) have been synthesized and characterized by various spectroscopic techniques and elemental analyses. Infrared spectroscopy shows that the ligand coordinates to the metal ions through the azomethine and pyridine nitrogen atoms as well as the sulfur atom of the thioamide group to form a tridentate chelate system. In vitro screening of metal complexes against four bacterial strains (Staphylococcus aureus (ATCC 43300), Klebsiella pneumoniae (ATCC 700603), Methicillin resistant staphylococcus aureus (ATCC 33591), Shigella flexneri (NR 518)) and four fungal strains (Candida albicans (NR 29444), Candida albicans (NR 29445), Candida albicans (NR 29451), Candida krusei (HM 1122)) indicate that the Cu(II) complex showed good antibacterial activity on Methicillin resistant staphylococcus aureus (ATCC 33591) while the Zn(II) complex showed moderate activity against some of the bacterial and fungi strains. Antioxidant studies reveal that the complexes are more potent than the ligand to eliminate free radicals, with the Ni(II) complex showing the best free radical scavenger.","PeriodicalId":89364,"journal":{"name":"European journal of chemistry (Print)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44969453","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}

引用次数: 0

A new hydrazide functionalized Schiff’s base derivative: Insights into crystallography, Hirshfeld surface, and energy framework analysis 一种新的酰肼功能化希夫碱衍生物:对晶体学、赫斯菲尔德表面和能量框架分析的见解

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.351-357.2310

V. P. Malviya, Archisman Dutta

{"title":"A new hydrazide functionalized Schiff’s base derivative: Insights into crystallography, Hirshfeld surface, and energy framework analysis","authors":"V. P. Malviya, Archisman Dutta","doi":"10.5155/eurjchem.13.3.351-357.2310","DOIUrl":"https://doi.org/10.5155/eurjchem.13.3.351-357.2310","url":null,"abstract":"A new hydrazide functionalized Schiff’s base derivative, N'-(3,4-dichlorobenzylidene)-4-hydroxybenzohydrazide (I), has been synthesized using a solvent-assisted mechano-chemical grinding strategy and structurally characterized using elemental analysis, 1H NMR and crystallographic studies. The single crystal X-ray diffraction study depicts that molecule is puckered with two aromatic rings lying out-of-plane in near anti-configuration across the C=N bond. The weak interactions involved in supramolecular framework formation are Cl···O, Cl···Cl, Cl···H, Cl···N, C···H, and O···H contacts. The intermolecular O···H interaction being stronger than other dispersive interactions such as halogen bonding, interlocks the molecules in a 2D sheet-type packing. All the structure directing interactions involved in developing crystal architecture are addressed with Hirshfeld surface analysis and fingerprint plots. The energy framework analysis shows visualization of 3D topology of short contacts related to molecular packing of compound I which further clarifies the predominance of both Coulombic and dispersive energies in developing supramolecular architecture.","PeriodicalId":89364,"journal":{"name":"European journal of chemistry (Print)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44022001","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}

引用次数: 1

Graphene: A future science material for water treatment 石墨烯：一种未来的水处理科学材料

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.358-368.2251

M. Suhail

引用次数: 0

Erratum to “Synthesis, characterization and crystal structure of platinum(II) complexes with thiourea derivative ligands” [European Journal of Chemistry 9 (4) (2018) 360-368] “含硫脲衍生物配体铂(II)配合物的合成、表征和晶体结构”的勘误[欧洲化学杂志]9 (4)(2018)360-368]

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.369-370.2249

E. Keskin, U. Solmaz, G. Binzet, I. Gumus, H. Arslan

引用次数: 0

Effective removal of arsenic (V) from aqueous solutions using efficient CuO/TiO2 nanocomposite adsorbent 高效CuO/TiO2纳米复合吸附剂对水中砷(V)的有效去除

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.284-292.2283

Saima Farooq, A. Siddiqa, S. Ashraf, S. Haider, S. Imran, S. Shahida, S. Qaisar

{"title":"Effective removal of arsenic (V) from aqueous solutions using efficient CuO/TiO2 nanocomposite adsorbent","authors":"Saima Farooq, A. Siddiqa, S. Ashraf, S. Haider, S. Imran, S. Shahida, S. Qaisar","doi":"10.5155/eurjchem.13.3.284-292.2283","DOIUrl":"https://doi.org/10.5155/eurjchem.13.3.284-292.2283","url":null,"abstract":"The groundwater is one of the biggest natural resources for providing drinking water to millions of people all around the globe. However, the presence of large amount of arsenic(V) in water causes serious health hazards to the consumers which necessitates the development of cost-effective remediation. The CuO/TiO2 nanocomposites were prepared by the precipitation-deposition method for the removal of the arsenate ion (AsO43-) from water. The prepared samples were characterized by powder X-ray diffraction, Fourier transform infrared, and scanning electron microscopy to examine crystallite size and structure, material purity, textural features, morphology, and surface area. The effect of different operating parameters such as pH, contact time, initial concentration of arsenic(V) and nanocomposite dose on the removal rate of arsenic(V) was examined to optimize the adsorption performance of the CuO/TiO2 nanocomposite. In addition, the adsorption mechanism was studied by employing Langmuir and Freundlich adsorption isotherms to gain better understanding of the adsorption mechanism. The Freundlich adsorption isotherm fits well with the experimental data and the maximum adsorption capacity of the Langmuir model was found to be 90 mg/g for arsenic(V). The CuO/TiO2 nanocomposite shows remarkable adsorption performance for the treatment of arsenic(V) contaminated water samples. This study provides a cost-effective solution for the safe use of groundwater contaminated with arsenic.","PeriodicalId":89364,"journal":{"name":"European journal of chemistry (Print)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44860502","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}

引用次数: 1

iNOS inhibitors: Benzimidazole-coumarin derivatives to combat inflammation iNOS抑制剂:抗炎症的苯并咪唑-香豆素衍生物

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.307-318.2282

Richa Minhas, Y. Bansal

{"title":"iNOS inhibitors: Benzimidazole-coumarin derivatives to combat inflammation","authors":"Richa Minhas, Y. Bansal","doi":"10.5155/eurjchem.13.3.307-318.2282","DOIUrl":"https://doi.org/10.5155/eurjchem.13.3.307-318.2282","url":null,"abstract":"Inducible nitric oxide synthase (iNOS) plays an important role in the inflammatory processes via accelerating the production of nitric oxide (NO). The efforts to develop small molecules as selective inhibitors of iNOS are being reported across the globe. The current study explores varied benzimidazole-coumarin derivatives as anti-iNOS agents. Literature survey suggests 2-aminobenzimidazole, coumarin nucleus, and 4-atom linker as important structural components for iNOS inhibition. Target compounds were designed and synthesized by coupling 2-aminobenzimidazole with (un)substituted coumarin through different linkers. These were docked in iNOS (1QW4) and nNOS (1QW6) targets to ascertain their iNOS selectivity, and evaluated for NO and iNOS inhibitory activities in vitro. The most active inhibitors were subsequently evaluated for acute toxicity and anti-inflammatory activity using carrageenan-induced rat paw edema model in vivo. All compounds possessed moderate to good NO and iNOS inhibitory activities. Compounds 14a, 14b, 14d, and 14e were the most potent inhibitors in vitro. These were found to significantly reduce the inflammation. Compounds 14d and 14e have been identified as the most potent iNOS inhibitors to combat inflammation. These derivatives may serve as potential compounds as such against iNOS, or as leads for the development of novel anti-iNOS agents.","PeriodicalId":89364,"journal":{"name":"European journal of chemistry (Print)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43865820","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}

引用次数: 0

Modification of coconut shell charcoal for metal removal from aqueous solutions 改性椰壳炭去除水溶液中的金属

European journal of chemistry (Print) Pub Date : 2022-09-30 DOI: 10.5155/eurjchem.13.3.259-266.2248

S. Zahra, Z. Mahmood, F. Deeba, Asma Sheikh, Hamim Bukhari, Habiba Mehtab

{"title":"Modification of coconut shell charcoal for metal removal from aqueous solutions","authors":"S. Zahra, Z. Mahmood, F. Deeba, Asma Sheikh, Hamim Bukhari, Habiba Mehtab","doi":"10.5155/eurjchem.13.3.259-266.2248","DOIUrl":"https://doi.org/10.5155/eurjchem.13.3.259-266.2248","url":null,"abstract":"Treatment of the contaminated aqueous solutions to improve their quality is indispensible for their reuse resulting in an emergent challenge to develop facile, nontoxic and less energy consuming techniques to purify water. Present study is therefore aimed at the synthesis of an adsorbent using agricultural waste i.e. coconut shell. The charcoal obtained from coconut shell was modified by acid activation and manganese doping following a simple chemical route. The products were characterized by scanning electron microscopy, energy dispersive X-ray analysis and infrared spectroscopy. Preliminary studies were carried out to compare the adsorption potential of acid modified coconut shell charcoal (AMCSC) and manganese doped coconut shell charcoal (MDCSC) for the removal of chromium (VI) and iron (III) from aqueous solutions. Various physicochemical parameters such as adsorbent dosage, initial metal ions concentration and pH were studied. MDCSC was found to be a better adsorbent for metals as compared to AMCSC and removed chromium more efficiently than iron from synthetic solutions i.e. 56.10% at optimum conditions i.e. 0.6 g/L adsorbent dosage, 10 mg/L initial metal ions concentration and pH = 3. The effect of adsorbents on color and conductivity of the aqueous solutions was also noted; slight variation in color of all the aqueous solutions with a maximum of 91.67% removal was observed.","PeriodicalId":89364,"journal":{"name":"European journal of chemistry (Print)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48902002","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}

引用次数: 1