Transition Metal Chemistry最新文献_第4页

Ruthenium–arene complexes with Bis(pyrazol-1-yl)methane ligands: Structural characterization, DFT investigation, and preliminary cytotoxicity studies 钌-芳烃配合物与双（吡唑-1-酰基）甲烷配体：结构表征，DFT调查和初步细胞毒性研究

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-07-10 DOI: 10.1007/s11243-026-00758-7

Amos K. Kanyora, Thato T. Medupe, Lucy W. Macharia, Karabo Serala, Mihlali V. Mlaza, Peter Ongoma, Josiah O. Omolo, Allen Mambanda, Sharon Prince, Gregory S. Smith, Reinner O. Omondi

{"title":"Ruthenium–arene complexes with Bis(pyrazol-1-yl)methane ligands: Structural characterization, DFT investigation, and preliminary cytotoxicity studies","authors":"Amos K. Kanyora, Thato T. Medupe, Lucy W. Macharia, Karabo Serala, Mihlali V. Mlaza, Peter Ongoma, Josiah O. Omolo, Allen Mambanda, Sharon Prince, Gregory S. Smith, Reinner O. Omondi","doi":"10.1007/s11243-026-00758-7","DOIUrl":"10.1007/s11243-026-00758-7","url":null,"abstract":"<div>A series of four η⁶-arene ruthenium(II) half-sandwich complexes (RuL1 - RuL4) with bis(pyrazol-1-yl)methane ligands (bpzm, bdmpzm) were synthesized and characterized by FTIR, NMR, ESI-MS, elemental analysis, and single-crystal X-ray diffraction. The structures confirmed the expected piano-stool geometries, with subtle effects of arene identity (p-cymene vs. toluene) and pyrazole methylation on Ru–N bond distances and chelate angles. Density functional theory (DFT) calculations at the B3LYP/6-31G**//LanL2DZ level reproduced the experimental structural parameters within ≤ 2.7% and revealed relatively large HOMO–LUMO gaps (3.971–4.068 eV), consistent with a comparatively high degree of electronic stability across the series. Preliminary cytotoxicity studies were conducted using single-dose screening at 20 µM in 0.1% DMSO against nine human cancer cell lines, including breast, cervical, pancreatic, and rhabdomyosarcoma subtypes, revealed limited cytotoxic activity, with cell viabilities exceeding 80% in all cases. Although no direct mechanistic relationship can be established from the present data, the low cytotoxic response may be associated, in part, with the relatively high electronic and kinetic stability of the complexes, which could limit biologically relevant ligand exchange, aquation, or redox-associated activation processes.Overall, the findings highlight the importance of balancing structural stability with controlled chemical lability in the design of biologically active η⁶-arene Ru(II) complexes and provide a basis for future ligand modifications, as well as additional studies on solution stability and speciation under biologically relevant conditions, aimed at improving biological performance.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465898","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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Enhanced photo-fenton catalysis via Fe-MOFs/Co₃O₄ composites for selective benzene hydroxylation to phenol Fe-MOFs/Co₃O₄复合材料增强光fenton催化选择性苯羟基化制苯酚

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-07-07 DOI: 10.1007/s11243-026-00754-x

Xiulian Wang, Lidan Yang, Zhiqi Song, Jiaqi Zhang, Liuxue Zhang, Xu Jia

引用次数: 0

Green synthesis of silver nanoparticles using Rumex hastatus root extract: characterization and biological activities 利用芦笋根提取物绿色合成纳米银：表征和生物活性

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-07-02 DOI: 10.1007/s11243-026-00753-y

Priyanka Sharma, Shikha Dhiman, Jyoti Rana, Amit Kumar Sehgal

{"title":"Green synthesis of silver nanoparticles using Rumex hastatus root extract: characterization and biological activities","authors":"Priyanka Sharma, Shikha Dhiman, Jyoti Rana, Amit Kumar Sehgal","doi":"10.1007/s11243-026-00753-y","DOIUrl":"10.1007/s11243-026-00753-y","url":null,"abstract":"<div>The present study describes the eco-friendly synthesis of silver nanoparticles (AgNPs) using Rumex hastatus D. Don root extracts and evaluates their antioxidant and antimicrobial activities in comparison with crude extracts. The characterization of synthesized nanoparticles was done by UV-visible spectroscopy, XRD, FESEM-EDX, HRTEM-SAED, FTIR, DLS and Zeta potential. Preliminary phytochemical screening confirmed the presence of carbohydrates, alkaloids, proteins, flavonoids, tannins, saponins and terpenoids. Quantitative analysis revealed that the acetone extract contained higher levels of flavonoids (274.38 ± 0.045 mg CE/g DE), phenolics (216.95 ± 0.0031 mg GAE/g DE), and tannins (375.22 ± 0.0056 mg CE/g DE). GC-MS analysis revealed that the acetone extract showed 55 peaks corresponding to 42 compounds, with the major constituent identified as (R)-(-)-2,2-Dimethyl-1,3-dioxolane-4-methanol and methanol extract exhibited 37 peaks representing 37 compounds, with 9,10-Anthracenedione, 1,8-dihydroxy-3-methyl- as the predominant compound. UV-Vis spectroscopy confirmed a surface plasmon resonance peak at 415 nm and XRD analysis indicated a crystalline face-centered cubic structure with an average crystallite size of 24.77 ± 1.88 nm. FESEM and HRTEM revealed spherical nanoparticles with an average size of 31.63 ± 2.69 nm. FTIR analysis indicated the involvement of functional groups in reduction and capping, while SAED and EDX confirmed crystallinity and elemental silver, respectively. A negative zeta potential (–25.5 mV) indicated good colloidal stability. Biological evaluations demonstrated that AgNPs exhibited superior antimicrobial efficacy and dose-dependent antioxidant potential, compared to the crude extracts. These findings highlight the promise of R. hastatus root-derived AgNPs as a biologically active nanomaterial for potential biomedical and therapeutic applications.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380266","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

Technical note: effect of oxygen partial pressure on the ammoniacal pressure leaching of gold and silver from a polymetallic (Au–Ag–Cu–Zn–Pb) concentrate 技术说明：氧分压对某多金属（Au-Ag-Cu-Zn-Pb）精矿氨压浸出金银的影响

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-06-30 DOI: 10.1007/s11243-026-00752-z

Sepideh Taheri, Mohammad Reza Khalesi

{"title":"Technical note: effect of oxygen partial pressure on the ammoniacal pressure leaching of gold and silver from a polymetallic (Au–Ag–Cu–Zn–Pb) concentrate","authors":"Sepideh Taheri, Mohammad Reza Khalesi","doi":"10.1007/s11243-026-00752-z","DOIUrl":"10.1007/s11243-026-00752-z","url":null,"abstract":"<div>Ammoniacal leaching is a recognized processing route for recovering metals from complex ores, in which the role of controlled gas-phase pressure in this environment has been less quantitatively assessed. This technical note investigates the effect of oxygen partial pressure on high-temperature, high-pressure ammoniacal leaching of a polymetallic (Au–Ag–Cu–Pb–Zn) oxide concentrate. Autoclave tests were conducted at 200 °C for 3 h using a solution containing 85 g/L NH₃, 48 g/L (NH₄)₂CO₃, 10 g/L CuSO₄, and 13 wt% solids, under two conditions: (a) without O₂ injection and (b) with O₂ injected to pO₂ ≈ 14 bar. The presence of O₂ markedly increased the recoveries of gold (from 43.6% to 71.7%) and silver (from 14.0% to 63.3%), while copper recovery decreased slightly (from 91.1% to 84.4%) and lead (from 12.6% to 8.7%) and zinc (from 61.0% to 56.5%) showed modest declines. XRD/XRF characterization of residues indicated an increased proportion of hematite and a reduction in carbonate phases under oxygenated conditions. Overall, the data reveal an opposing response of precious metals (Au, Ag) versus base metals (Cu, Pb, Zn) to elevated oxygen partial pressure, suggesting that pO₂ control can be leveraged to promote selective recovery of precious metals during ammoniacal pressure leaching.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380846","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

Nanorod-like molybdenum/nickel-copper-doped iron phosphide as highly active electrocatalysts for enhanced hydrogen evolution reaction 纳米棒状钼/镍铜掺杂磷化铁作为强化析氢反应的高活性电催化剂

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-06-29 DOI: 10.1007/s11243-026-00751-0

Pingping Gao, Shiwen Wu, Zhongping Ren, Ting Lei, Meilian Gao, Qinghua Chen

{"title":"Nanorod-like molybdenum/nickel-copper-doped iron phosphide as highly active electrocatalysts for enhanced hydrogen evolution reaction","authors":"Pingping Gao, Shiwen Wu, Zhongping Ren, Ting Lei, Meilian Gao, Qinghua Chen","doi":"10.1007/s11243-026-00751-0","DOIUrl":"10.1007/s11243-026-00751-0","url":null,"abstract":"<div>Developing high-efficiency, stable and low-cost non-noble metal electrocatalysts for water electrolysis is crucial for green hydrogen generation. In this paper, self-supported bimetal-co-doped iron phosphide with nanorod-like morphology loaded on carbon paper (CP) were fabricated through a two-step method. The microstructure and hydrogen evolution reaction (HER) performances of Mo-Cu co-doped (Mo-Cu-FeP/CP-0.1:0.2) and Ni-Cu co-doped (Ni-Cu-FeP/CP-0.1:0.2) catalysts in acidic and alkaline electrolytes were systematically investigated. The results demonstrate that Mo-Cu-FeP possesses smaller particle size arising from lattice distortion induced by atomic radius differences. Compared with FeP, Mo and Cu exist in the form of high-valence oxides and effectively modulate the electronic structure of Fe species, while Ni and Cu form Ni-Cu–P bonds which act as additional catalytic active sites. In 0.5 M H₂SO₄ electrolyte, Ni-Cu-FeP/CP-0.1:0.2 catalyst delivers an overpotential of merely 63 mV at 10 mA cm⁻² for HER with a Tafel slope of 38 mV dec⁻¹ and a charge transfer resistance (Rct) as low as of 1.52 Ω cm⁻². In 1.0 M KOH electrolyte, Mo-Cu-FeP/CP-0.1:0.2 exhibits superior HER activity with an overpotential of 95 mV at 10 mA cm⁻², a Tafel slope of 55 mV dec⁻¹ and an Rct of 1.80 Ω cm⁻². Compared with single-metal doping modification, bimetallic co-doping remarkably enhances intrinsic activity and electrochemical active area via multi-atomic synergistic coupling effects. Among them, Ni-Cu-P bonds provide extra active sites in acidic media, whereas Mo-induced lattice distortion and electron-withdrawing effects facilitate the water dissociation step in alkaline media. This study provides a feasible bimetallic doping strategy for the design of non-noble metal electrocatalysts for hydrogen evolution with low-cost and high-performance.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380777","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

A planar binuclear Cadmium(II)-Acylhydrazone Schiff base complex as a potent DNA-targeted anticancer agent 平面双核镉(II)-酰基腙希夫碱配合物作为一种有效的dna靶向抗癌剂

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-06-29 DOI: 10.1007/s11243-026-00740-3

Jun Wang, Peiyu Peng, Xuexue Pan, Wenhua Zhao, Qamar Abbas

{"title":"A planar binuclear Cadmium(II)-Acylhydrazone Schiff base complex as a potent DNA-targeted anticancer agent","authors":"Jun Wang, Peiyu Peng, Xuexue Pan, Wenhua Zhao, Qamar Abbas","doi":"10.1007/s11243-026-00740-3","DOIUrl":"10.1007/s11243-026-00740-3","url":null,"abstract":"<div>This study developed a planar binuclear Cd(II) acylhydrazone Schiff base complex as a novel DNA-targeted anti-tumour agent. The complex was synthesised via a one-pot reaction of the ligand HL with cadmium nitrate. X-ray crystallography revealed a centrosymmetric structure, with each Cd(II) ion in a seven-coordinate geometry, forming a rigid planar system through phenoxide bridging. Spectroscopic analyses confirmed ligand-to-ligand charge transfer fluorescence with a lifetime of 5.746 ns, attributed to enhanced rigidity upon coordination. DNA binding studies demonstrated that the complex intercalates strongly into CT-DNA, with a high binding constant (Kb = 4.85 × 105 M-1), significantly greater than that of the free ligand. In vitro assays showed the complex exhibits potent, concentration-dependent anti-proliferative activity against A549 and MCF-7 cancer cells (IC50 = 10.88 µM and 5.28 µM, respectively), effectively inducing apoptosis, unlike the weak ligand. This planar binuclear Cd(II) complex is a promising candidate for the development of new metal-based anticancer drugs.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380779","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

Synthesis, crystal structure, DFT, and anticancer evaluation of a novel organotin(IV)-phenanthroline complex 一种新型有机锡-菲罗啉配合物的合成、晶体结构、DFT和抗癌评价

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-06-29 DOI: 10.1007/s11243-026-00755-w

Chinnaiah Bhaskar, Mohamed Alkafafy, Samy F. Mahmoud, Natarajan Elangovan, Srinivasan Chandrasekar

{"title":"Synthesis, crystal structure, DFT, and anticancer evaluation of a novel organotin(IV)-phenanthroline complex","authors":"Chinnaiah Bhaskar, Mohamed Alkafafy, Samy F. Mahmoud, Natarajan Elangovan, Srinivasan Chandrasekar","doi":"10.1007/s11243-026-00755-w","DOIUrl":"10.1007/s11243-026-00755-w","url":null,"abstract":"<div>A new di(3-bromobenzyl)dibromo(4,7-dimethyl-1,10-phenanthroline)tin(IV) complex (B3) was synthesised and characterised by FTIR, FT-Raman, multinuclear (1 H, 13 C and 119Sn) NMR and single crystal X-ray diffraction studies. The structural analysis showed a distorted octahedral geometry around the Sn(IV) centre stabilised by intermolecular C–H···Br interactions. Hirshfeld surface analysis showed the presence of predominant H…H and H…Br contacts in the crystal packing. The experimental geometry was validated by DFT calculations at B3LYP/LanL2DZ basis set. The HOMO-LUMO energy gap was found to be 2.4063 eV suggesting good kinetic stability and intramolecular charge transfer properties. Analysis of MEP, ELF, LOL and NCI-RDG further elucidated the electronic distribution and noncovalent interactions of the complex. The in-vitro MTT assay demonstrated prominent anticancer activity of B3 against HeLa cells and good biocompatibility toward Vero cells with superior activity than cisplatin. Molecular docking studies against targets (PDB: 8PPM and 121P) revealed favourable binding energies of − 7.10 and − 7.03 kcal/mol, respectively. The experimental and theoretical results suggest that the synthesised organotin(IV) complex is a potential candidate for anticancer studies.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380778","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

On Cu-Cu bonding in paddle-wheel copper(II) acetates 桨轮铜（II）醋酸酯中Cu-Cu键合的研究

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-06-25 DOI: 10.1007/s11243-026-00750-1

Ingrid Jelemenska, Martin Breza

{"title":"On Cu-Cu bonding in paddle-wheel copper(II) acetates","authors":"Ingrid Jelemenska, Martin Breza","doi":"10.1007/s11243-026-00750-1","DOIUrl":"10.1007/s11243-026-00750-1","url":null,"abstract":"<div>Starting from the X-ray structure of [Cu2(µ2-O2CCH3)4]0•2H2O, the structures of [Cu2(CH3COO)n]q, n = 1 → 4, with charges q = 4-n and 2-n for the oxidation states Cu(II) and Cu(I), respectively, were optimized in the singlet and triplet ground spin states. Their electronic structures were evaluated in terms of Quantum Theory of Atoms-in-Molecule (QTAIM). Molecular graphs of Cu(II) complexes with two or fewer acetate bridges exhibit no Cu-Cu bonding. Their Cu-Cu distances decrease with the number of acetate ligands. The O-O distances in the same carboxyl group are always shorter than the Cu-Cu ones, therefore, it can be concluded that two or fewer carboxylate bridges are not sufficient to press both Cu atoms together to form a bond critical point (BCP) between them. Hypothetical dicopper(I) acetates exhibit the BCP between both Cu atoms even in 3[Cu2(µ2-O2CCH3)]+ unlike its unbridged singlet counterpart. The instability of the hypothetical [Cu2(µ2-O2CCH3)4]2− complex can be ascribed to the limited coordination number of Cu(I) central atoms (with subsequent Cu-O bond splitting). The QTAIM characteristics of the BCPs between both Cu atoms in all complexes under study are not sufficient to distinguish true Cu-Cu bonding from an artifact of pressing both copper atoms together by carboxylate bridges.</div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11243-026-00750-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148305991","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

Progress in Cu-based nanocatalysts for hydrogen generation from ammonia borane: A cost-effective and promising approach 硼氨制氢用铜基纳米催化剂的研究进展：一种具有成本效益和前景的方法

IF 2.8 4区化学

Transition Metal Chemistry Pub Date : 2026-06-22 DOI: 10.1007/s11243-026-00748-9

Xiongfei Sun, Gaosheng Nie, Xiugang Li

引用次数: 0

Retraction Note: Synthesis, characterization, and photocatalytic potential of CoFe2O4 nanoparticles immobilized on graphitic carbon nitride 在氮化石墨碳上固定的CoFe2O4纳米颗粒的合成、表征和光催化潜力

IF 1.7 4区化学

Transition Metal Chemistry Pub Date : 2026-06-12 DOI: 10.1007/s11243-026-00746-x

Sonali Dichayal, Dinesh Hase, Rupali Murade, Sulakshana Deshmukh, Mika Sillanpää, Vaishali Murade, Rajeshwari Oza

引用次数: 0