Transition Metal Chemistry最新文献_第7页

Optimizing adsorption efficiency: synthesis and characterization of zinc-doped strontium titanate for highly effective removal of malachite green dye 优化吸附效率：用于高效去除孔雀石绿染料的掺锌钛酸锶的合成与表征

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-09-06 DOI: 10.1007/s11243-024-00606-6

N. P. Bhagya, G. K. Prashanth, B. N. Veerabhadraswamy, Srilatha Rao, S. R. Yashodha, H. S. Yogananda, H. S. Lalithamba

{"title":"Optimizing adsorption efficiency: synthesis and characterization of zinc-doped strontium titanate for highly effective removal of malachite green dye","authors":"N. P. Bhagya, G. K. Prashanth, B. N. Veerabhadraswamy, Srilatha Rao, S. R. Yashodha, H. S. Yogananda, H. S. Lalithamba","doi":"10.1007/s11243-024-00606-6","DOIUrl":"10.1007/s11243-024-00606-6","url":null,"abstract":"<div>The current study describes the use of an extremely effective adsorbent for the removal of dye from an aqueous solution. This work focuses on the prospective use of zinc-doped strontium titanate (Zn2+:ST) nano-powder to remove the malachite green (MG) from an aqueous medium. Optimization of experimental conditions to find the maximum dye adsorption is studied in detail. The Zn2+:ST nano-powder was synthesized using the low-temperature solution combustion method and extensively characterized using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), FTIR and UV–visible spectroscopy. PXRD analysis revealed a cubic structure of Zn2+:ST, closely matching ICDD card No. 35-734, indicating a space group of pm-3 m (No. 221). The average crystallite size was found to be 20–30 nm using the Scherrer formula. SEM images depicted the particles’ irregular shape. UV–visible spectroscopy showed the band gap of 3.1 eV and FTIR confirmed formation of M–O bond at 582 cm−1 and 868 cm−1 for SrO and ZnO, respectively. Optimal adsorption parameters were determined by varying dosage, stirring rate, and pH. Under these optimized conditions, for 10 ppm of stock solution, an impressive 98% adsorption efficiency was achieved with a 10 mg/L dose, 30-min contact time, and pH 10. Adsorption isotherms were fitted to the Langmuir model, showing a favorable correlation between experimental data and the model. This study provides valuable insights into the potential application of zinc-doped ST nano-powder for efficiently removing malachite green from water solutions.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"50 1","pages":"75 - 87"},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224322","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}

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Chiral ferrocenylimine alcohols and corresponding reduced ferrocenyl secondary amine alcohols: synthesis, X-crystal structures and characterization 手性二茂铁亚胺醇和相应的还原二茂铁仲胺醇：合成、X 晶体结构和表征

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-08-30 DOI: 10.1007/s11243-024-00604-8

Dan-Dan Lu, Ya-Meng Zhu, Yi-Jie Li, Ai-Quan Jia, Qian-Feng Zhang

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A novel approach to study ascorbic acid oxidation using hexavalent chromium species—theoretical and practical perspectives of the use of potentiometric titration technique 利用六价铬物种研究抗坏血酸氧化的新方法--使用电位滴定技术的理论和实践前景

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-08-29 DOI: 10.1007/s11243-024-00602-w

Bogusław Pilarski, Dariusz Wyrzykowski

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Mineralogical characterization of Indonesian rare earth elements from secondary resource (zircon tailings) 印度尼西亚二次资源（锆石尾矿）中稀土元素的矿物学特征

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-08-26 DOI: 10.1007/s11243-024-00603-9

Gyan Prameswara, Iga Trisnawati, Panut Mulyono, Agus Prasetya, Himawan Tri Bayu Murti Petrus

{"title":"Mineralogical characterization of Indonesian rare earth elements from secondary resource (zircon tailings)","authors":"Gyan Prameswara, Iga Trisnawati, Panut Mulyono, Agus Prasetya, Himawan Tri Bayu Murti Petrus","doi":"10.1007/s11243-024-00603-9","DOIUrl":"10.1007/s11243-024-00603-9","url":null,"abstract":"<div>The increase in demand for products based on rare earth metals has increased because of their recent surge in usage. Additionally, primary sources of rare earth metals, such as bastnaesite, are scarce. Therefore, it is necessary to characterize secondary sources to explore the potential of other rare earth metal sources to overcome their scarcity. This study utilizes zircon tailings from zircon processing in Indonesia, which are the result of magnetic separation of zircon sand (magnetic particles). An analysis of the elemental and mineral composition, as well as the particle size distribution of the tailings, was conducted. The results revealed a significant ZrO2 composition of 10.3%, with 14.11% CeO2 and 11.47% Y2O3 as the major oxides. Additionally, ThO2 was present at 2%, which could be considered for the processing of zircon tailings for rare earth metal refinement because of its radioactive properties. The mineral phases indicate that the tailings consist mainly of xenotime, monazite, and zircon. Additionally, a rare earth metal-bearing mineral, cerianite, is present. The concentration of rare earth metals is greater for larger particles, whereas that of zircon is greater for smaller particles. These findings can be used to determine the next steps in the rare earth metal purification or extraction process.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"50 1","pages":"43 - 49"},"PeriodicalIF":1.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185472","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}

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Slowing the reactivity of dicyclometalated Pd(II) complexes through the 2,6-bis(N-heterocyclic carbene)pyridine (C^N^C) non-leaving ligands: kinetic and computational study 通过 2,6-双（N-杂环碳烯）吡啶 (C^N^C) 非离开配体减缓二环甲基化钯（II）配合物的反应性：动力学和计算研究

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-08-21 DOI: 10.1007/s11243-024-00601-x

Daniel O. Onunga, Deogratius Jaganyi, Allen Mambanda

{"title":"Slowing the reactivity of dicyclometalated Pd(II) complexes through the 2,6-bis(N-heterocyclic carbene)pyridine (C^N^C) non-leaving ligands: kinetic and computational study","authors":"Daniel O. Onunga, Deogratius Jaganyi, Allen Mambanda","doi":"10.1007/s11243-024-00601-x","DOIUrl":"10.1007/s11243-024-00601-x","url":null,"abstract":"<div>In this study, the kinetic and mechanistic studies of the substitution of chloride ligand of [(chloro)(2,6-bis(N-heterocyclic carbene)pyridine)Pd(II)]BF4 complexes, namely Pd1, Pd2, Pd3 and Pd4, by thiourea nucleophiles viz Tu, Dmtu and Tmtu were investigated. The rate of chloride substitution of dicyclometalated complexes was monitored in aqueous media containing 20 mM LiCl using stopped-flow spectrophotometry as a function of concentration and temperature under pseudo-first-order conditions. The kinetic data fitted to the pseudo-first-order rate law, kobs = k2[Nu]. The rate of chloride substitution decreased in the order Pd1 ˃ Pd2 ˃ Pd4 ˃ > Pd3. The reactivity of Pd1 was lower by two orders of magnitude compared to [Pd(terpy)Cl]+ (terpy = terpyridine). Both complexes have strong π-acceptor non-leaving ligands that promote efficient back bonding of charge into the aromatic bis(NHC) chelates of its non-leaving ligand. Contrastingly, the lutidine-bridged complexes, (Pd2-4) form 6-membered and non-aromatic bis(NHC) chelates which cause steric influence on either side of the square plane. Their substituents also impart additional steric effects and σ-inductive effects in the rings. The combined effect significantly lowers rates of substitution. Consequently, Pd3 was the least reactive. The substitution mechanism is associative since no evidence of a mechanistic change over to the dissociative substitution was observed, despite the complexes coordinated with tridentates with two cis-σ-bound carbon donors.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"50 1","pages":"21 - 31"},"PeriodicalIF":1.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224323","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}

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Ultra-fast microwave irradiation: a superior method of fabricating ZnO quantum wires 超快微波辐照：一种制造氧化锌量子线的优越方法

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-08-05 DOI: 10.1007/s11243-024-00600-y

Salahuddin Sourav, Shamsun Alam, Harinarayan Das

{"title":"Ultra-fast microwave irradiation: a superior method of fabricating ZnO quantum wires","authors":"Salahuddin Sourav, Shamsun Alam, Harinarayan Das","doi":"10.1007/s11243-024-00600-y","DOIUrl":"10.1007/s11243-024-00600-y","url":null,"abstract":"<div>ZnO nanorods were successfully synthesized by the microwave irradiation method in this project. The procedure verified the highest yields, least expense, and fastest synthesis of pure, fine-grained, single-phase ZnO nanorods; additionally, the procedure is ecologically friendly. Same-scale size nanorods displayed varying d-spacing values with the Hold time changed at a constant temperature of 150 °C in the microwave reactor, as supported by the TEM results. HRTEM pictures verified the ZnO nanorods’ perfect form. The quality of the nanoparticles’ crystallization was demonstrated by SAED patterns and data. The hexagonal wurtzite structure of ZnO nanorods is further supported by the matching of the diffraction rings in the SAED image with the peaks in the XRD pattern. Based on the data analysis, we concluded that the d-spacing values in ZnO nanorods at various nanometer scales increased. The absence of diffraction peaks from other contaminants indicated a high level of purity in ZnO samples. All the diffraction peaks were in good arrangement with those of the hexagonal structure of ZnO. Only the elements zinc (Zn) and oxygen (O) appeared in the EDX data, and the mass fraction was calculated. In the UV–visible absorbance spectrum, the absorbance peak located at the wavelength of 376 nm was the characteristic peak for hexagonal wurzite ZnO. The bandgap for ZnO nanorods held for one minute at a constant temperature of 150 °C is 3.24 eV; the binding energy gap for samples maintained for five minutes is 3.25 eV; and the binding energy gap for samples held for fifteen minutes is 3.28 eV, as determined by the UV–vis data. The presence of a peak at 432 cm−1 at 1 min Hold Time ZnO nanorods FTIR data, 434 cm−1 in 5 min Hold time ZnO nanorods FTIR data, and 451 cm−1 proved a characteristic vibration of the Zn–O bond in the wurzite structure of ZnO. Therefore, at a constant temperature of 150 °C, the distinctive peaks of ZnO nanorods increased with variations in hold duration.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"50 1","pages":"1 - 20"},"PeriodicalIF":1.6,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936755","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}

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In vitro and in silico studies of a di-copper cyclam complex for anticancer application: functionalization, cytotoxicity, ADMET profile and molecular docking as a VEGFR1 inhibitor 用于抗癌的二铜环酰胺复合物的体外和硅学研究：作为血管内皮生长因子受体 1 抑制剂的功能化、细胞毒性、ADMET 特征和分子对接

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-07-30 DOI: 10.1007/s11243-024-00597-4

Brahim El Bali, Amani Direm, Mohammed Lachkar, Diana Díaz-García, Santiago Gómez-Ruiz, Hassan Dihazi

{"title":"In vitro and in silico studies of a di-copper cyclam complex for anticancer application: functionalization, cytotoxicity, ADMET profile and molecular docking as a VEGFR1 inhibitor","authors":"Brahim El Bali, Amani Direm, Mohammed Lachkar, Diana Díaz-García, Santiago Gómez-Ruiz, Hassan Dihazi","doi":"10.1007/s11243-024-00597-4","DOIUrl":"10.1007/s11243-024-00597-4","url":null,"abstract":"<div>Single crystals of the dinuclear cyclam complex (1, 4, 8, 11-tetraazacyclotetradecane)-copper (ii) tetrachlorocuprate {[Cu(14-ane)]CuCl4} (1) were prepared by soft chemistry. The powder, resulting from their grinding, was characterized by FTIR spectroscopy and functionalized using silica support materials MSN and halloysite H. The in vitro studies conducted on (1) formulated with MSN or halloysite H against kidney epithelial cell line (HK2) and renal cancer cell (RCC) lines (Caki-2, TW, LN78) demonstrated significant antiproliferative effects for both renal cell types. An increase in the apoptosis levels in the RCC lines underscoring the potential as an anticancer therapeutic agent was observed. These findings were corroborated by an in silico analysis aimed at exploring the ADMET profile of (1), indicating favorable aqueous solubility, brain penetration and druglikeness properties akin to FDA-approved VEGFR inhibitors such as sorafenib and cabozantinib. To gain deeper insights into the anticancer behavior of (1), molecular docking simulations against the vascular endothelial growth factor receptor VEGFR1 (PDB entry code 3HNG) were conducted. The evaluation of the interacting modes and binding sites in the 3HNG-(1) target–ligand complex revealed diverse hydrogen-bonding interactions within the receptor’s binding pocket, suggesting a promising inhibition potential of (1) against VEGFR1.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"49 6","pages":"465 - 483"},"PeriodicalIF":1.6,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868337","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}

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The mechanical, thermodynamic and electronic characters of TiFe at extreme pressures: first-principles calculation 极压下 TiFe 的机械、热力学和电子特性：第一原理计算

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-07-27 DOI: 10.1007/s11243-024-00599-2

Chongyang Fu, Le Zhang, Weiqi Li, Yongyu Yang, Jinrui Yang, Xijian Qi, Xiaojuan Ma

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Electric arc vacuumless synthesis of IV–V group transition metal carbides 电弧无真空合成 IV-V 族过渡金属碳化物

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-07-20 DOI: 10.1007/s11243-024-00598-3

Yuliya Z. Vassilyeva, Alexander Ya. Pak, Alexandra I. Kokorina, Zhanar S. Bolatova, Dmitrii O. Glushkov

{"title":"Electric arc vacuumless synthesis of IV–V group transition metal carbides","authors":"Yuliya Z. Vassilyeva, Alexander Ya. Pak, Alexandra I. Kokorina, Zhanar S. Bolatova, Dmitrii O. Glushkov","doi":"10.1007/s11243-024-00598-3","DOIUrl":"10.1007/s11243-024-00598-3","url":null,"abstract":"<div>Refractory transition metal carbides are of interest due to their high melting point and hardness. This work demonstrates the synthesis of transition metal carbides, such as TiC, VC, ZrC, NbC, HfC, and TaC, by vacuumless electric arc method. Numerical simulation of heat transfer processes in the reaction zone was implemented to predict the parameters (temperature and reaction duration) ensuring synthesis and dominance of the corresponding metal carbide phases over by-products. The obtained parameters were used for a series of experiments conducted to confirm the production of transition metal carbides under specified conditions during arc discharge plasma synthesis. The fabricated materials were analyzed by X-Ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray spectroscopy techniques in order to assess the parameters of the structure, chemical composition, and particle morphology of the synthesized products. The oxidation properties of each monocarbide were studied by differential thermal analysis, thermal gravimetry and differential scanning calorimetry.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"49 6","pages":"485 - 493"},"PeriodicalIF":1.6,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741325","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}

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Thiobenzamide-based ruthenium complexes: chemical reactivity and promising biological investigations against Leukemia cancer cells 硫代苯甲酰胺基钌配合物：针对白血病癌细胞的化学反应活性和前景广阔的生物学研究

IF 1.6 4区化学

Transition Metal Chemistry Pub Date : 2024-07-06 DOI: 10.1007/s11243-024-00596-5

Paulo G. F. Azevedo, Luciano V. Pacheco, Felipe E. M. Carneiro, Gabriela C. Fernandes, Denise S. de Sá, Ivanilson P. Santos, Cássio S. Meira, Milena B. P. Soares, Tércio F. Paulo, Eduardo H. S. Sousa, Luiz G. F. Lopes, Carlos D. S. da Silva

{"title":"Thiobenzamide-based ruthenium complexes: chemical reactivity and promising biological investigations against Leukemia cancer cells","authors":"Paulo G. F. Azevedo, Luciano V. Pacheco, Felipe E. M. Carneiro, Gabriela C. Fernandes, Denise S. de Sá, Ivanilson P. Santos, Cássio S. Meira, Milena B. P. Soares, Tércio F. Paulo, Eduardo H. S. Sousa, Luiz G. F. Lopes, Carlos D. S. da Silva","doi":"10.1007/s11243-024-00596-5","DOIUrl":"10.1007/s11243-024-00596-5","url":null,"abstract":"<div>Two new metal complexes containing the ligand thiobenzamide (TBz), with the formula cis-[RuCl(TBz)(L)2]PF6, where L = 2,2’-bipyridine (bpy) or o-phenanthroline (phen), were synthesized and characterized by cyclic voltammetry and spectroscopic techniques (UV–Vis, IR, 1H and 13C NMR). These compounds showed cytotoxic activity in all cancer cell lines studied. The HL-60 strain was the most sensitive to both metal complexes, with IC50 ranging from 1.5 µmol L−1 to 5.7 µmol L−1. Interestingly, [RuCl(TBz)(bpy)2]PF6 exhibited a significant selectivity index of 6.6 for the cytotoxicity ratio between normal cells (MRC-5) and cancer cells (HL-60). In addition, this metal complex promoted mitochondrial membrane depolarization and increased mitochondrial superoxide production. Finally, synergism was observed between [RuCl(TBz)(bpy)2]PF6 and doxorubicin in combination against a cell model with HL-60 cells. A combinatorial index of 0.27 was observed in this study. In addition, an isobologram study showed points below the isobolographic line, indicating a synergistic effect. These results show promising pharmacological potential for these compounds which deserve further biological investigation.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"49 6","pages":"453 - 464"},"PeriodicalIF":1.6,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566821","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