Ya Liu, Qiwen Yang, Shuang Wang, Runhan Liu, Haodong Yu, Wenhong Xu, Yuwei Ning
{"title":"Synthesis, Crystal Structures and Catalytic Oxidation Property of Two Copper(II) Complexes Derived from 5-Bromo-2-((2-piperazin-1-ylethylimino)methyl)phenol.","authors":"Ya Liu, Qiwen Yang, Shuang Wang, Runhan Liu, Haodong Yu, Wenhong Xu, Yuwei Ning","doi":"10.17344/acsi.2025.9182","DOIUrl":"https://doi.org/10.17344/acsi.2025.9182","url":null,"abstract":"<p><p>Two new copper(II) complexes, [Cu(HL)(ONO2)]NO3 (1) and [CuCl(HL)]Cl∙H2O (2), where HL is the zwitterionic form of the Schiff base 5-bromo-2-((2-piperazin-1-ylethylimino)methyl)phenol (HL), have been prepared. The Schiff base and two complexes were characterized by IR and UV-Vis spectroscopy. In addition, the free Schiff base was characterized by 1H NMR spectroscopy. Structures of the complexes were further confirmed by single crystal X-ray diffraction. The Cu atoms in the complexes are in square planar coordination. Crystal structures of both copper complexes are stabilized by hydrogen bonds. The complexes have high catalytic activity for the epoxidation of styrene, with conversions and selectivity over 90%.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"164-170"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661822","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}
{"title":"Developing chemical literacy in non-formal learning environments: A systematic literature review.","authors":"Alenka Dražić, Iztok Devetak","doi":"10.17344/acsi.2024.9108","DOIUrl":"10.17344/acsi.2024.9108","url":null,"abstract":"<p><p>The study examines the development of chemical literacy in non-formal learning environments based on a systematic literature review conducted between 2010 and 2023. Non-formal education serves as a valuable complement to the formal school system, enabling the exploration of topics often overlooked in formal curricula due to rigid regulations or teachers' lack of expertise. The review included 236 primary articles, of which 19 met strict inclusion criteria. The results indicate that the most employed approaches in non-formal education are inquiry-based learning, laboratory work with an emphasis on independent experimental activities, and science camps. Non-formal education significantly contributes to the development of chemical literacy, fosters interest in science, and improves attitudes toward chemistry. The authors highlight the need for further research in this field and greater integration of non-formal approaches into formal education to enhance the scientific literacy of young learners.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"145-153"},"PeriodicalIF":1.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662050","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}
{"title":"Manganese, cobalt, nickel and zinc complexes with pyrazine-2-carboxylic acid.","authors":"Saša Petriček","doi":"10.17344/acsi.2024.9095","DOIUrl":"https://doi.org/10.17344/acsi.2024.9095","url":null,"abstract":"<p><p>New complexes of zinc (1), manganese(II) (2 and 2a), cobalt(II) (3) and nickel(II) chloride (4), with pyzaH (pyrazine-2-carboxylic acid) were synthesized. The pyzaH molecules are coordinated as monodentate ligands only through heterocyclic nitrogen in 1, 2 and 3, as shown by single crystal X-ray diffraction analysis. The chloride ions are coordinated as terminal ligands in 1, [ZnCl2(pyzaH)2]×2H2O, but act as bridging ligands in the 1D complexes [MCl2(pyzaH)2]n×2nH2O (M = Mn, 2, Co, 3). The supramolecular architectures of the complexes differ due to the coordination of the chlorides, the hydrogen bonds and the parallel stacking arrangements of the pyzaH molecules. In contrast to the isolated crystals of 1, 2 and 3, the manganese(II) (2a) and nickel(II) (4), compounds do not contain water. According to the IR spectra and the results of thermal analyzes, the proposed formula is [MCl2(pyzaH)2]. Powder X-ray and thermal analysis results demonstrate the isostructural nature of complexes 2a and 4. The low thermal stability of 1 is due to the monodentate coordination of pyzaH in 1. Thermal decomposition of 1, 2a and 4 in air produces oxides MO (M = Mn, Ni, Zn).</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"133-144"},"PeriodicalIF":1.2,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662094","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}
{"title":"Synthesis and antibacterial activity of vanillic acid derivatives containing indole structure.","authors":"Jianlong Zhang, Qiang Liu, JiLiang Hu, ZhongQiang Zhang, QingMei Zhou, JiaBao Luan, Yue Wang, WeiWei Liu","doi":"10.17344/acsi.2024.9106","DOIUrl":"10.17344/acsi.2024.9106","url":null,"abstract":"<p><p>Using indole-2-carboxylic acid and vanillic acid as raw materials, a series of 11 novel compounds (7a-7k) were synthesized by chemically linking indole-2-carboxylic acid and vanillic acid through an aminothioureido group. The antibacterial activity of these compounds against Vibrio harveyi and Vibrio parahaemolyticus was evaluated using the agar perforating method. The results indicated that compounds 7g-7j exhibited superior antibacterial activity against both strains compared to the positive control, with 7g showing the best performance. Structure-activity relationship analysis suggested that alkylation of the nitrogen atom in the indole ring could enhance the antibacterial effect, and shorter carbon chains were associated with better antibacterial activity.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"127-132"},"PeriodicalIF":1.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661736","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}
Hang Li, Tian-Xiao Yang, Qingsheng Zhao, Yuan Zhu, Bing Zhao
{"title":"High-pressure ultrasonic-assisted extraction of cannabinoids from industrial hemp leaves: Structure analysis and antioxidant activity.","authors":"Hang Li, Tian-Xiao Yang, Qingsheng Zhao, Yuan Zhu, Bing Zhao","doi":"10.17344/acsi.2024.8822","DOIUrl":"10.17344/acsi.2024.8822","url":null,"abstract":"<p><p>Cannabinoids are very valuable natural products of industrial hemp. In this work, the high-pressure ultrasonic-assisted extraction (HUE) technique was employed for the first time to extract cannabinoids from industrial hemp leaves. A maximum extraction yield (60.02 ± 0.09 mg/g) was obtained through the single-factor experiments, which was much higher compared to ultrasonic-assisted extraction (UE, 42.88 ± 0.02 mg/g) and stirring extraction (SE, 35.35 ± 0.07 mg/g). The optimized HUE conditions were: extraction time was 40 min, EtOH concentration was 60%, extraction temperature was 60℃, ultrasonic power was 400 W, RL/S was 20 mL/g, stirring rate was 400 rpm, and extraction pressure was 0.6 MPa. The total phenolic content (TPC, 244.36 ± 0.84 mg GAE/g extract) and the total flavonoids content (TFC, 0.27 ± 0.02 mg RE/g extract) of the HUE extract were also the highest. The HUE mechanism was revealed to some extent by several characterizations including surface morphology that HUE could deeply destroy the structure of leave particles. Furthermore, the in vitro antioxidant activity of HUE extract was the best among the three extracts. The EC50 values against DPPH and ABTS were 0.28 mg/mL and 0.25 mg/mL, respectively. In summary, this work confirmed that HUE was a suitable method for extracting cannabinoids and the obtained extract with a high content of cannabinoids had great application values.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"34-44"},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662088","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}
{"title":"Walnut shells activated carbons for adsorption of nitrite ions.","authors":"Irina Ceban Ginsari, Raisa Nastas","doi":"10.17344/acsi.2024.8693","DOIUrl":"https://doi.org/10.17344/acsi.2024.8693","url":null,"abstract":"<p><p>In this paper, activated carbons obtained from walnut shells were used as adsorbents to remove nitrite ions from aqueous solutions. The novel adsorbent was obtained by modification with hydrochloric acid. The physical-chemical characteristics of activated carbons were determined from nitrogen sorption isotherms, SEM-EDX, elemental analysis, FTIR, thermal analysis, and temperature programmed decomposition (TPD). According to the results obtained, chlorine is retained on the surface in an amount of 2%. The results of batch experiments indicate that maximum adsorption/ removal of nitrite ions can be achieved at pH = 3, being of 0.2 mg/g for CAN and 4.7 mg/g for CAN-Cl. To study the adsorption of nitrite ions on activated carbons the following mathematical models were used: pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic models, and Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin-Pyzhev isotherm models.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"24-33"},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661874","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}
{"title":"Efficient Treatment of Olive Mill Wastewater using a Three-Column Continuous System Packed with Different Adsorbents.","authors":"Khaled Muftah Elsherif, Mohamed Elbagermi, Aisha Shemila","doi":"10.17344/acsi.2024.9047","DOIUrl":"https://doi.org/10.17344/acsi.2024.9047","url":null,"abstract":"<p><p>This study aimed to investigate the feasibility and effectiveness of using a three-column continuous system for treating olive mill wastewater (OMW). The methodology involved passing the wastewater through three successive columns packed with various adsorbent materials. The efficiency was evaluated by measuring several chemical and physical properties before and after treatment, including pH, EC, TDS, acidity, turbidity, chloride, nitrate, nitrite, sulphate, phosphate, Na, K, Ca, Fe, Cu, total phenols, and total flavonoids. The initial values of these properties varied among the samples. After treatment, the measured properties were significantly changed, including an increase in pH from 4.8 to 6.9, EC from 12990 to 1407 µS/cm, turbidity from 7328 to 2791 NTU, chloride from 3400 to 422 ppm, nitrate from 307 to 4.34 ppm, Na from 293 to 178 ppm, K from 2243 to 86 ppm, Ca from 91 to 60 ppm, and a significant reduction in total phenols from 9821 to 35 mg/g. The results suggest that the proposed treatment is effective for purifying OMW and offers insights for developing sustainable and eco-friendly wastewater treatment methods.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"71-85"},"PeriodicalIF":1.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661999","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}
{"title":"Synthesis, crystal and electronic structure, and thermal behavior of a new flame retardant-hardener [Cu(diethylenetriamine)2]Cl2•H2O for epoxy resins.","authors":"Borys Mykhalichko, Helen Lavrenyuk, Volodymyr Olijnyk, Yurii Slyvka, Oleg Mykhalichko, Yuriy Starodub","doi":"10.17344/acsi.2024.9051","DOIUrl":"https://doi.org/10.17344/acsi.2024.9051","url":null,"abstract":"<p><p>A copper(II) chelate complex with diethylenetriamine (deta), [Cu(deta)2]Cl2·H2O (1), was synthesized by direct interaction of solid copper(II) chloride dihydrate with deta. Complex 1 was characterized by X-ray structural analysis, infrared (IR) spectroscopy and differential scanning calorimetry (DSC) and was studied as a flame retardant-hardener for epoxy resins. The crystals of 1 consist of [Cu(deta)2]2+ cations, Cl- anions and uncoordinated water molecules. Each Cu(II) atom is chelated with two tridentate molecules of deta, which bond to the central Cu(II) atom in a non-equivalent manner. This results in a distorted tetragonal bipyramidal environment around the Cu(II) atom. The crystal packing of the structural units in 1 is determined by both the dominant cation-anion interaction and strong hydrogen bonds, such as N-H···Cl, N-H···O, and O-H···Cl. Density functional theory (DFT) calculations were performed to determine the electron structure of 1 using the restricted formalism of B3LYP method with a 6-31G* orbital basis set. The d-orbitals of the Cu2+ ion are split due to the interaction of a tetragonal bipyramidal environment and the chelation, resulting in the visually observed dark blue color of crystals of 1. This color closely corresponds to the calculated value of the visible light wavelength (λ = 661.37 nm), which is related to the energy of photons absorbed by the complex (Δ = 1.874 eV).</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"86-95"},"PeriodicalIF":1.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661670","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}
{"title":"Syntheses, Crystal Structures and Antimicrobial Activity of NiII, ZnII and MnIII Complexes Derived from N,N'-Bis(4-bromosalicylidene)propane-1,2-diamine.","authors":"Yu-Mei Hao","doi":"10.17344/acsi.2024.9122","DOIUrl":"https://doi.org/10.17344/acsi.2024.9122","url":null,"abstract":"<p><p>Four new nickel(II), zinc(II) and manganese(III) complexes, [NiL] (1), [Zn3L2(OAc)2] (2), [ZnL(CH3OH)] (3) and [MnClL(DMF)] (4), derived from the bis-Schiff base N,N'-bis(4-bromosalicylidene)propane-1,2-diamine (H2L) have been prepared and characterized by spectroscopy methods, as well as single crystal X-ray determination. The Ni atom in the mononuclear nickel complex 1 is in square planar coordination. The outer and inner Zn atoms in the trinuclear zinc complex 2 are in square planar and octahedral coordination, respectively. The Zn atom in the mononuclear zinc complex 3 is in square pyramidal coordination. The Mn atom in the mononuclear manganese complex 4 is in octahedral coordination. Antibacterial activity of the complexes has been assayed on the bacteria Staphylococcus aureus and Escherichia coli, and the yeast Candida parapsilosis.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"119-126"},"PeriodicalIF":1.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661734","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}
{"title":"The Effect of Al2(SO4)3 on Compressive Strength in SLU Based on Ternary Binder System.","authors":"Nevin Karamahmut Mermer, Fatos Hatipoglu, Dilber Uludag, Ece Unlu Pinar","doi":"10.17344/acsi.2023.8115","DOIUrl":"https://doi.org/10.17344/acsi.2023.8115","url":null,"abstract":"<p><p>The early flexural and compressive strengths of fast setting SLU formulations based on a ternary system can be severely affected by the selection of accelerator, its quantity and chemistry. Besides design complexity, it is predicted that the current lithium resources will not be sufficient to meet the increasing demands from other markets and lithium prices are expected to increase. It is necessary to search for a new raw material that gives the same performance to prevent the possibility of a supply shortage in the construction sector. In this study, ternary system accelerated with aluminum sulphate was comprehensively investigated in comparison with commonly used accelerators. Aim to achieve is to provide early strength by using aluminum sulphate in the OPC-rich SLU formulation based on the ternary systems instead of traditional accelerators while obtaining cost saving solutions. For this purpose, fresh mortar properties and strength test were carried out according to EN 13813 and results were verified by monitoring hydration reactions over time by XRD and FTIR.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"15-23"},"PeriodicalIF":1.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661840","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}