Bulletin of the Chemical Society of Ethiopia最新文献

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Degradation of six sulfonamide antibiotics in water by the novel VUV/UV/H2O2 process 新型VUV/UV/H2O2工艺降解水中6种磺胺类抗生素
4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2025-10-08 DOI: 10.4314/bcse.v39i11.17
Longyuan Tan, Haitao Yu, Laxiang Yang
{"title":"Degradation of six sulfonamide antibiotics in water by the novel VUV/UV/H2O2 process","authors":"Longyuan Tan, Haitao Yu, Laxiang Yang","doi":"10.4314/bcse.v39i11.17","DOIUrl":"https://doi.org/10.4314/bcse.v39i11.17","url":null,"abstract":"The widespread occurrence of sulfonamide antibiotics in aquatic environments poses serious ecological and health risks due to their persistence and potential to promote antibiotic resistance. This study investigates the degradation of six sulfonamide antibiotics using a novel vacuum ultraviolet/ultraviolet/hydrogen peroxide (VUV/UV/H2O2) process. The removal efficiency exceeded 94.5% for all compounds after 10 min of VUV/UV/H2O2 treatment. Degradation followed pseudo-first-order kinetics and was primarily driven by hydroxyl radicals (HO•), as confirmed by scavenger experiments using tert-butanol. Optimal conditions were identified as an initial H2O2 concentration of 5 mM and pH 5. Higher H2O2 concentrations (> 4 mM) and alkaline conditions (pH > 7) reduced degradation efficiency due to radical recombination and scavenging. Water matrix components, particularly natural organic matter, significantly inhibited degradation by quenching HO• and attenuating ultraviolet light penetration. Degradation pathways under VUV/UV/H2O2 treatment involved multiple transformation reactions, including amino group oxidation, chlorine atom substitution, and aromatic ring hydroxylation, followed by cleavage, ultimately resulting in mineralization. These findings highlight the VUV/UV/H2O2 process as a promising and effective strategy for removing sulfonamide antibiotics from contaminated water bodies. KEY WORDS: Vacuum ultraviolet, Hydrogen peroxide, Sulfonamide antibiotics, Degradation Bull. Chem. Soc. Ethiop. 2025, 39(11), 2315-2328. DOI: https://dx.doi.org/10.4314/bcse.v39i11.17","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"39 11","pages":"2315-2328"},"PeriodicalIF":0.0,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ajol.info/index.php/bcse/article/download/307660/289273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147917650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis, characterization and anti-corrosion study of Ni(II) and Cu(II) complexes with Schiff base based on 3,5-dichlorosalicylaldehyde and 2-aminobenzenethiol 3,5-二氯水杨醛- 2-氨基苯乙醇席夫碱Ni(II)和Cu(II)配合物的合成、表征及防腐研究
4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2025-09-01 DOI: 10.4314/bcse.v39i10.5
Suad T. Saad, Zeena A. Hussain
{"title":"Synthesis, characterization and anti-corrosion study of Ni(II) and Cu(II) complexes with Schiff base based on 3,5-dichlorosalicylaldehyde and 2-aminobenzenethiol","authors":"Suad T. Saad, Zeena A. Hussain","doi":"10.4314/bcse.v39i10.5","DOIUrl":"https://doi.org/10.4314/bcse.v39i10.5","url":null,"abstract":"Schiff base ligand derived from 3,5-dichlorosalsyldehyde and 2-aminobenzethiol was synthesized by mixing the two compounds in a condensation reaction in 1:1 molar ratio. Nickel(II) and copper(II) complexes of this ligand were also synthesized by refluxing the ligand with both mentioned metal chloride salts. The synthesized compounds were characterized by the available characterization methods such as 1HMNR, 13CNMR, mass spectroscopy, FTIR, UV-Vis and molar conductivity. Based on these characterization methods, the proposed structures of both complexes adopt an octahedral geometry, where the ligand coordinates through the azomethine, hydroxyl, and thione functional groups. The anti-corrosion activities of the synthesized compounds were investigated under two temperatures (298 K and 308 K) and two concentrations (0.01 and 0.05M). The Cu(II) complex exhibited superior anti-corrosion activity (94%) compared to the free ligand and the Ni(II) complex. KEY WORDS: 3,5-Dichlorosalicylaldehyde, 2-Aminobenzenethiol, Schiff base, Cu(II) and Ni(II) complexes, Anticorrosion activity Bull. Chem. Soc. Ethiop. 2025, 39(10), 1937-1948. DOI: https://dx.doi.org/10.4314/bcse.v39i10.5","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"39 10","pages":"1937-1948"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ajol.info/index.php/bcse/article/download/304969/286668","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147916036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure of organic compounds: A new manganese(II) polymer constructed by 5-nitroisophthalic acid and bis(1H-benzimidazolyl)butane 有机化合物的结构:由5-硝基间苯二甲酸和双(1h -苯并咪唑)丁烷构成的新型锰(II)聚合物
4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2025-07-22 DOI: 10.4314/bcse.v39i9.5
Xiaomin Li, Yi‐Jen Huang, B. Liu, Mingyue Sun, Yuzhu Pan
{"title":"Structure of organic compounds: A new manganese(II) polymer constructed by 5-nitroisophthalic acid and bis(1H-benzimidazolyl)butane","authors":"Xiaomin Li, Yi‐Jen Huang, B. Liu, Mingyue Sun, Yuzhu Pan","doi":"10.4314/bcse.v39i9.5","DOIUrl":"https://doi.org/10.4314/bcse.v39i9.5","url":null,"abstract":"A new manganese coordination polymer [Mn(NIPH)(bbib)]n (where H2NIPH stands for 5-nitroisophthalic acid and bbib represents 1,4-bis(1H-benzimidazolyl)butane) has been hydrothermally synthesized and its structure has been characterized through single-crystal X-ray diffraction. The polymer crystallizes in the monoclinic space group P21/n, with unit cell parameters of a = 9.7170(5), b = 13.2435(6), c = 18.4243(9) Å, b = 98.5830(10)°, and Z = 4. The Mn(II) ions exhibit trigonal biyramidal coordination and are linked by diverse NIPH2− anions to form binuclear subunits. These subunits are associated into 3D networks via NIPH2- and bbib ligands. KEY WORDS: Mn(II) complex, Crystal structure, 5-Nitroisophthalic acid, 1,4-Bis(1H-benzimidazolyl)butane Bull. Chem. Soc. Ethiop. 2025, 39(9), 1713-1722. DOI: https://dx.doi.org/10.4314/bcse.v39i9.5","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"39 9","pages":"1713-1722"},"PeriodicalIF":0.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ajol.info/index.php/bcse/article/download/300095/282121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147915444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FeS2 nanosheets as mimetic peroxidase for sensitive colorimetric detection of biothiols FeS2纳米片作为模拟过氧化物酶用于生物硫醇的灵敏比色检测
4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2025-07-22 DOI: 10.4314/bcse.v39i9.4
Shangying Qin, Li Huang, Xin Shu, Jin Lin Yang, Shiqi Cheng, Yilin Wang
{"title":"FeS2 nanosheets as mimetic peroxidase for sensitive colorimetric detection of biothiols","authors":"Shangying Qin, Li Huang, Xin Shu, Jin Lin Yang, Shiqi Cheng, Yilin Wang","doi":"10.4314/bcse.v39i9.4","DOIUrl":"https://doi.org/10.4314/bcse.v39i9.4","url":null,"abstract":"The preparation and application of nanomaterials with enzyme-like activity have attracted widespread attention from researchers. Herein, we prepared FeS2 nanosheets (FeS2 NSs) with peroxidase mimicking behavior through a simple hydrothermal pathway. Then, a FeS2 NSs-based colorimetric assay for biothiols detection was established. On one hand, FeS2 NSs could catalyze H2O2 to oxidize colorless 3,3',5,5'-tetramethylbenzidine (TMB) to blue oxidized product (ox-TMB) with a characteristic peak at 652 nm. On the other hand, when a biothiol compound including cysteine (CySH), homocysteine (HcySH) and glutathione (GSH) was present, ox-TMB would be reduced, resulting in lighter blue and lower absorbance. Suggesting that the change of absorbance could be used for quantitative detection of biothiols. Taking HcySH as an example, several experimental parameters including pH, incubation time, and TMB concentration were optimized. Under the conditions of pH 4.5, incubation time of 50 min, and TMB of 0.4 mM, the limit of detection for HcySH, CySH and GSH was as low as 0.67, 0.59 and 0.36 μM, respectively. To verify its possible application, this method was further applied for the determination of HcySH in real serum samples, and good recoveries of 95.0 to 103.8% were obtained. KEY WORDS: Nanosheets, Peroxidase‐like activity, Spectrophotometric, Determination Bull. Chem. Soc. Ethiop. 2025, 39(9), 1699-1711. DOI: https://dx.doi.org/10.4314/bcse.v39i9.4","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"39 9","pages":"1699-1711"},"PeriodicalIF":0.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147882187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Structure and magnetism of a linear tetranuclear nickel complex ligated by compartmental ligand 由区隔配体连接的线性四核镍配合物的结构和磁性
4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2025-01-22 DOI: 10.4314/bcse.v39i4.13
Feng Zhang, Yun Chen, Jia-Nan Feng, Sun Jian-hua, Chen Huang
{"title":"Structure and magnetism of a linear tetranuclear nickel complex ligated by compartmental ligand","authors":"Feng Zhang, Yun Chen, Jia-Nan Feng, Sun Jian-hua, Chen Huang","doi":"10.4314/bcse.v39i4.13","DOIUrl":"https://doi.org/10.4314/bcse.v39i4.13","url":null,"abstract":"A new nickel(II) complex [Ni4L3(acac)2(H2O)2]·2DMF·Et2O (1) (acac = acetylacetonate, and DMF = N,N′-dimethylformamide) was isolated in solid crystalline form with the reaction of nickel(II) acetylacetonate and compartmental Schiff base ligand 1,2-bis(2-hydroxy-3-methoxybenzylidene) hydrazine (H2L). Single crystal X-ray analysis showed that the complex has a linear tetranuclear structure. In the complex, an unusual μ3– and μ4–bridging modes of Ligand L2- were coexisting. Variable-temperature magnetic studies revealed that weak antiferromagnetic interaction exists between the nickel(II) ions coupling through phenoxide−O atoms and −N−N− bridging moieties. Bull. Chem. Soc. Ethiop. 2025, 39(4), 781-789. DOI: https://dx.doi.org/10.4314/bcse.v39i4.13","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"39 4","pages":"781-789"},"PeriodicalIF":0.0,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ajol.info/index.php/bcse/article/download/287047/270440","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Co(II) and Ni(II) complexes with bis(4-((E)-(4,5-diphenyl-1H-imidazol-2-yl)diazenyl) phenyl)methane: synthesis, characterization and anti-corrosion effect investigation Co(II)和Ni(II)与双(4)-((E)-(4,5-二苯基- 1h -咪唑-2-基)重氮基)苯基)甲烷配合物的合成、表征及防腐效果研究
4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2024-04-30 DOI: 10.4314/bcse.v38i4.12
Suad T. Saad
{"title":"Co(II) and Ni(II) complexes with bis(4-((E)-(4,5-diphenyl-1H-imidazol-2-yl)diazenyl) phenyl)methane: synthesis, characterization and anti-corrosion effect investigation","authors":"Suad T. Saad","doi":"10.4314/bcse.v38i4.12","DOIUrl":"https://doi.org/10.4314/bcse.v38i4.12","url":null,"abstract":"Bright coloured Co (II) and Ni (II) complexes of an azo ligand were synthesized. This ligand was previously synthesized from the coupling reaction between 4,5-diphenyl imidazole and 4,4-diaminodiphenylmethane in 1:2 molar ratio (4,4-diaminodiphenylmethane and 4,5-diphenyl imidazole). The synthesis process of the complexes involved the reflux reaction between the azo ligand with both metal salts. The synthesized complexes were characterized by FTIR, UV.-Visible, molar conductivity and atomic absorption. From the obtained characteristic data of the FTIR spectra, the coordination between the two metals and the azo ligand occurs by the coordination with the nitrogen atom of the azo group and one of the nitrogen atoms in the imidazole both rings. The molar conductivity test confirm the non- electrolytic nature of both complexes, while the atomic absorption agrees with the expected complexes formula. Therefore, the octahedral structure for the two complexes is suggested. The anti-corrosion activity of the synthesized compounds were investigated under two temperatures (298 and 308 K) with 0.03 gm of each compound was tested. According to the results cobalt (II) complex shows a better anti-corrosion activity (93%) in comparison with the ligand and nickel (II) complex. KEY WORDS: Cobalt(II) and nickel(II) azo complexes, Imidazole derivative, Anti-corrosion effect Bull. Chem. Soc. Ethiop. 2024, 38(4), 963-971. DOI: https://dx.doi.org/10.4314/bcse.v38i4.12","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"38 4","pages":"963-971"},"PeriodicalIF":0.0,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ajol.info/index.php/bcse/article/download/269678/254546","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147894151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemical composition, antibacterial and antioxidant activities of essential oils from Ccyphostemma adenocaule and Ziziphus spinachristi Ccyphostemma adenocaule 和 Ziziphus spinachristi 精油的化学成分、抗菌和抗氧化活性
IF 1.2 4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-11-29 DOI: 10.4314/bcse.v38i1.13
Hadush Gebrehiwot, A. Dekebo, Kebede Shenkute, Urgessa Ensermu, Milkyas Endale
{"title":"Chemical composition, antibacterial and antioxidant activities of essential oils from Ccyphostemma adenocaule and Ziziphus spinachristi","authors":"Hadush Gebrehiwot, A. Dekebo, Kebede Shenkute, Urgessa Ensermu, Milkyas Endale","doi":"10.4314/bcse.v38i1.13","DOIUrl":"https://doi.org/10.4314/bcse.v38i1.13","url":null,"abstract":"In the present work, the chemical composition, antibacterial and antioxidant potencies of essential oils (EOs) extracted from the leaves and roots of Cyphostemma adenocaule and Ziziphus spinachristi were evaluated. Hydrodistillation was used to extract the EOs and the chemical compositions were analyzed by GC-MS. The antibacterial activity of the EOs were evaluated against four bacterial strains by agar disc diffusion method. Moreover, the antioxidant properties were evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay method. Perillyl alcohol (13.08%) and phytone (12.64%) were the major compounds detected in the leaves and roots of Cyphostemma adenocaule respectively. Whereas, nootkatone was the principal compound detected in the leaves (30.12%) and roots (26.52%) of Ziziphus spinachristi. The antibacterial activity results showed that, the EOs of Cyphostemma adenocaule and Ziziphus spinachristi displayed the highest inhibition zones against Streptococcus pyogenes (13.67 ± 0.34 and 12.67 ± 0.10 mm respectively) at 10 mg/mL. The antioxidant activity of the EOs were also promising, and the strongest IC50 value (4.15 µg/mL) was calculated for Ziziphus spinachristi (leaves). Thus, the antibacterial and antioxidant properties of the EOs enlighten the use of these plants for the aforementioned activities and as a common ingredients in cosmetic applications. KEY WORDS: Essential oils, Antibacterial activity, Antioxidant activity, Cyphostemma adenocaule, Ziziphus Bull. Chem. Soc. Ethiop. 2024, 38(1), 167-186. DOI: https://dx.doi.org/10.4314/bcse.v38i1.13","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"3 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139209355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient removal of methylene blue dye from aqueous solution using a new biosorbent derived from Ensete ventricosum (Enset) 利用一种从Ensete ventricosum(恩塞特)中提取的新型生物吸附剂高效去除水溶液中的亚甲基蓝染料
IF 1.2 4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-11-29 DOI: 10.4314/bcse.v38i1.6
Belete Tewabe Gebeyehu, Daniel Manaye Kabtamu, Temesgen Alehegne Tasew
{"title":"Efficient removal of methylene blue dye from aqueous solution using a new biosorbent derived from Ensete ventricosum (Enset)","authors":"Belete Tewabe Gebeyehu, Daniel Manaye Kabtamu, Temesgen Alehegne Tasew","doi":"10.4314/bcse.v38i1.6","DOIUrl":"https://doi.org/10.4314/bcse.v38i1.6","url":null,"abstract":"In this study, kocho was prepared from pseudostem and corm of Ensete ventricosum (enset).The behaviors of kocho were examined by using FESEM, TGA, XRD and FTIR spectroscopy. The biosorption potential of kocho, a possible low-cost new biosorbent for the efficient removal of MB dye from wastewater was investigated. Biosorption experiments were carried out in batch mode to study the effects of biosorbent dosages (0.025-0.2 g), pH (2–10), initial concentrations of MB (10 to 100 mg/L) and contact time (10 to 120 min).The highest removal efficiency of methylene blue dye (94.2%) was recorded at optimum experimental conditions. Following the removal study, it was determined that the pseudo-second order kinetics (R2 = 0.997) and Langmuir isothermal (R 2= 0.996) models may well describe the MB dye biosorption process. Furthermore, this newly developed biosorbent was fairly recyclable up to five cycles without significant loss of re-adsorption efficiency (around 9.6% loss) between 1st and 5th cycle.  Thus, the findings of this study revealed that a new kocho biosorbent derived from Ensete ventricosum can be used as a promising low-cost, environmentally friendly and efficient biosorbent for the rapid removal of MB from aqueous solutions. KEY WORDS: Kocho, Ensete ventricosum, Biosorption, Methylene blue, Kinetics, Isothermal Bull. Chem. Soc. Ethiop. 2024, 38(1), 69-84. DOI: https://dx.doi.org/10.4314/bcse.v38i1.6","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139210007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New iron(III), cobalt(II), nickel(II), copper(II), zinc(II) mixed-ligand complexes: Synthesis, structural, DFT, molecular docking and antimicrobial analysis 新的铁(III)、钴(II)、镍(II)、铜(II)、锌(II)混合配体配合物:合成、结构、DFT、分子对接和抗菌分析
IF 1.2 4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-11-29 DOI: 10.4314/bcse.v38i1.12
Hany M Abd El-Lateef, Ali M. Ali, Mai M Khalaf, A. Abdou
{"title":"New iron(III), cobalt(II), nickel(II), copper(II), zinc(II) mixed-ligand complexes: Synthesis, structural, DFT, molecular docking and antimicrobial analysis","authors":"Hany M Abd El-Lateef, Ali M. Ali, Mai M Khalaf, A. Abdou","doi":"10.4314/bcse.v38i1.12","DOIUrl":"https://doi.org/10.4314/bcse.v38i1.12","url":null,"abstract":"The present framework has as its goal the design and synthesis and characterization of new mononuclear 1:1:1 (M:L:Q) mixed-ligand complexes, including FeLQ, CoLQ, NiLQ, CuLQ, and ZnLQ. The \"L,\" is the 4-[(4-oxo-4,5-dihydro-1,3-thiazol-2-yl)hydrazono]methylphenyl 4-methylbenzenesulfonate, while the \"Q,\" is the 8-hydroxy quinoline. According to the findings, L and Q ligands each play the role of a neutral bi-dentate NN and a monobasic bi-dentate ON ligand, respectively. The findings demonstrated an octahedral shape. The density functional theory (DFT) technique was employed, and the quantum chemical descriptors were assessed, to optimize the molecular structure of the compounds. An in vitro investigation was carried out to investigate the antibacterial and antifungal activities of the compounds. According to the findings, the activity of metal complexes as potential candidates for use as antibiotics and antifungals is much greater than that of their free ligands. The in-silico inhibition of the 1fj4 protein was investigated using molecular docking. ZnLQ complex was the one that inhibited the 1fj4 protein with the greatest degree of success. The fact that this is the case lends credence to the notion that these compounds have the potential to function as launchpads for the development of new classes of antibiotics. KEY WORDS: Metal complexes, Schiff-base, Antimicrobial, DFT, Molecular docking Bull. Chem. Soc. Ethiop. 2024, 38(1), 147-166. DOI: https://dx.doi.org/10.4314/bcse.v38i1.12","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"228 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139210439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of physiochemical and electrochemical behaviour of reduced grapheme functionalized copper nanostructure as an effective corrosion inhibitor 评估作为有效缓蚀剂的还原石墨烯功能化纳米铜结构的理化和电化学行为
IF 1.2 4区 化学
Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-11-29 DOI: 10.4314/bcse.v38i1.20
Haewon Byeon, K. Haribabu, Giriraj Kiradoo, V. S. Sreenivasan, M. Sivaprakash, S. Richard, J. Sunil
{"title":"Evaluation of physiochemical and electrochemical behaviour of reduced grapheme functionalized copper nanostructure as an effective corrosion inhibitor","authors":"Haewon Byeon, K. Haribabu, Giriraj Kiradoo, V. S. Sreenivasan, M. Sivaprakash, S. Richard, J. Sunil","doi":"10.4314/bcse.v38i1.20","DOIUrl":"https://doi.org/10.4314/bcse.v38i1.20","url":null,"abstract":"This study examines the physicochemical properties and corrosion resistance of hydrothermally produced copper oxide-reduced graphene oxide nanocomposite (CuO/rGO). The CuO/rGO nanocomposite has a well-defined and homogeneous structure, decreased crystal size, and uniformly distributed CuO nanoparticles tethered to the rGO. X-Ray diffraction confirms the fabrication of 15.1 nm crystalline monoclinic CuO nanoparticles. EDX confirms the composite's composition by detecting Cu, O, and C components. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (LSV) tests evaluate the CuO/rGO nanocomposite's corrosion resistance. A mild steel plate under an HCl electrolyte with corrosion in the PPM ratio treats the nanocomposite-coated substrate. The composite's synergistic effect is assessed by comparing its corrosion performance to CuO/rGO concentrations in ppm. The corrosion resistance data demonstrate that the CuO/rGO composite improves with inhibitor concentrations of 0, 25, 50, 75, and 100 ppm. Adding rGO to the composite protects it and speeds up charge transfer, reducing corrosion and improving stability. The composite's synergistic effect of CuO and rGO provides excellent corrosion resistance regardless of concentration, making it a viable material for corrosion-prone applications. The research develops novel and effective anti-corrosion methods to preserve materials in the food, automotive, and large-scale energy industries. KEY WORDS: CuO/rGO nanocomposite, Tafel plot, Corrosion protection, Surface analysis Bull. Chem. Soc. Ethiop. 2024, 38(1), 269-280. DOI: https://dx.doi.org/10.4314/bcse.v38i1.20","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":"4 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139211792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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