Transition Metal Chemistry最新文献

{"title":"A 1D helical coordination polymer based on Cu(II)/L-arginine-schiff base: structure and supramolecular insights","authors":"Syed Meheboob Elahi","doi":"10.1007/s11243-026-00766-7","DOIUrl":"10.1007/s11243-026-00766-7","url":null,"abstract":"<div><p>A chiral Cu(II)–L-arginine Schiff base self-assembles into a one-dimensional helical coordination polymer. Hirshfeld surface analysis shows that O···H hydrogen bonding controls the supramolecular structure. UV–Vis and circular dichroism studies confirm effective transfer of molecular chirality into the extended coordination framework.</p><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837806","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":"Additive-guided copper electrocrystallization in acetonitrile/water media","authors":"Akbayan Bekey,&nbsp;Tatyana Shakiyeva,&nbsp;Gaukhar Yergaziyeva,&nbsp;Florence Vacandio,&nbsp;Khaisa Avchukir","doi":"10.1007/s11243-026-00773-8","DOIUrl":"10.1007/s11243-026-00773-8","url":null,"abstract":"<div><p>Copper electrodeposition on a glassy carbon electrode from a 70:30 (v/v) acetonitrile/water (AN/H₂O) electrolyte containing 0.01 M CuCl₂ and 0.5 M NaClO₄ as the background electrolyte was investigated in the absence and presence of 10^–3 M sodium dodecyl sulfate (SDS), tetrabutylammonium chloride (TBACl), and betaine hydrochloride ([Hbet]Cl) to elucidate the additive-dependent electrocrystallization in a mixed-solvent medium. Potentiostatic current-time transients recorded at − 0.45 V vs. Ag|AgCl were evaluated within the Scharifker-Hills (SH) framework to assess nucleation regimes and further analyzed using Scharifker-Mostany (SM) model to obtain the apparent nucleation descriptors A and N₀. The additive-free and SDS-containing electrolytes exhibited predominantly progressive-like 3D nucleation, whereas the TBACl and [Hbet]Cl responses lay between the progressive and instantaneous limits, with [Hbet]Cl showing a shift toward the instantaneous limit. TBACl yielded the highest SM-derived A and N₀ values, corresponding to the strongest apparent early-stage nucleation response among the investigated systems. The apparent double-layer capacitance (C_dl) of the resulting Cu/GC composite electrodes, measured by cyclic voltammetry in an aqueous 0.5 M NaHCO₃ solution, followed the order TBACl &gt; SDS &gt; [Hbet]Cl &gt; additive-free sample. Scanning electron microscopy (SEM) provided complementary qualitative information on the final deposit morphologies within the examined regions, from sparsely distributed faceted crystallites in the additive-free electrolyte to closely spaced particulate deposits with TBACl and flower-/rosette-like crystallites with [Hbet]Cl and SDS. Overall, the results show additive-dependent differences in early-stage nucleation behaviour, apparent Cu/GC capacitive response, and final deposit morphology, providing a basis for future direct evaluation of the resulting Cu/GC electrodes in CO₂ electroreduction.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837581","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":"Experimental and Theoretical Insights into the Optical and Vibrational Behavior of a Zero-Dimensional Transition Metal-Based Tetrachloridocobaltate Hybrid","authors":"Thameur Dammak,&nbsp;Abir Kessentini,&nbsp;Kawthar Abid","doi":"10.1007/s11243-026-00749-8","DOIUrl":"10.1007/s11243-026-00749-8","url":null,"abstract":"<div><p>This work presents a combined experimental and theoretical study of the molecular structure, vibrational, and optical properties of tris(1,8-octanediammonium) bis(tetrachloridocobaltate) dichloride (C₈H₂₂N₂)₃(CoCl₄)₂Cl₂. The crystal structure consists of discrete [CoCl₄]²⁻ anions surrounded by organic (C₈H₂₂N₂)²⁺ cations and uncoordinated Cl⁻ ions, resulting in a zero-dimensional structure. Optical properties were investigated using UV–visible absorption and photoluminescence (PL) spectroscopy at room temperature. The UV–visible absorption spectrum exhibits an absorption edge near 280 nm, corresponding to an optical band gap of 4.42 eV. The PL spectrum shows a strong blue-green emission centered at 470 nm (2.63 eV). Additional characterization was performed using Raman and infrared spectroscopy at room temperature. For reliable assignment of vibrational modes, the IR and Raman spectra were calculated using density functional theory (DFT) at the B3LYP/LanL2DZ level. To gain deeper insight into the electronic structure, DFT and time-dependent DFT (TD-DFT) calculations were carried out, enabling evaluation of the density of states (DOS) and estimation of the band gap. The theoretical results show good agreement with the experimental observations, as evidenced by the close correspondence between calculated and measured absorption spectra. These results demonstrate that the optical properties arise from a synergistic interplay between the inorganic [CoCl₄]²⁻ units and the organic sublattice. In addition to offering a less toxic alternative to lead-based systems, this material shows promising potential for optoelectronic and photonic applications.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783151","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 and characterization of two trinuclear Cu2IIZnII complexes with different molecular shape using salicylaldimine ligand and cyanate ion","authors":"Lakshmi Kanta Das","doi":"10.1007/s11243-026-00771-w","DOIUrl":"10.1007/s11243-026-00771-w","url":null,"abstract":"<div><p>Two new hetero-metallic trinuclear copper(II)-Zinc(II) complexes; [(CuL¹)₂Zn(NCO)₂] (<b>1</b>) and [(CuL²)₂Zn(NCO)₂] (<b>2</b>) have been isolated by mixing two similar metalloligands [CuL¹] or [CuL²] (where H₂L¹= N, N’-bis(salicylidene)-1,3-propanediamine and H₂L² = N, N′-bis(α-methylsalicylidene)-1,3-propanediamine) separately with Zn(ClO₄)₂·6H₂O and NaOCN at same reaction condition. The trinuclear complexes have been structurally characterized by single crystal X-ray analyses showing that the molecular shape of <b>1</b> is bent whereas <b>2</b> is a triangular. In <b>1</b>, the zinc is six-coordinate, being bonded to four oxygen atoms from two [CuL¹] units and a couple of cyanate nitrogen atoms. The geometry around Zn(II) is far from ideal octahedron. The coordination environments around copper centres are square planar with different degrees of tetrahedral distortions. On the other hand, Zn(II) is being bonded to only two phenoxido oxygens along with two cyanate nitrogen atoms and it is now distorted tetrahedral in <b>2</b>. Interestingly, Cu(II) ions involve in axial interactions <i>via</i> double µ₃-phenoxido bridges with phenoxido oxygens that not bonded to Zn(II). As a result, they are now in a penta-coordinated square pyramidal environment.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Two new trinuclear hetero-metallic Cu(II)-Zn(II) compounds with different molecular shapes have been isolated by reacting two similar metalloligand with zinc perchlorate and sodium cyanate. Both the compounds have been characterized by elemental analysis, IR spectroscopy and single crystal X-ray crystallography</p></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752217","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":"Chemical processing and extraction of cerium phosphate from Mongolian monazite-bearing apatite ore","authors":"B. Chuluunchimeg,&nbsp;O. Enkh-Uyanga,&nbsp;Ts. Erdenebaatar,&nbsp;G. Burmaa,&nbsp;B. Munhktsetseg","doi":"10.1007/s11243-026-00770-x","DOIUrl":"10.1007/s11243-026-00770-x","url":null,"abstract":"<div><p>Mongolia possesses substantial rare earth element resources however, industrial-scale extraction and processing remain underdeveloped. This study presents an optimized hydrometallurgical route for the selective recovery of cerium as cerium phosphate (CePO₄) from monazite-bearing apatite ore of the Mushgai Khudag deposits in Southern Mongolia. Alkaline cracking was conducted at a solid: liquid ratio of 1:4 using 8.75 N NaOH at 140 °C for 3 h, enabling effective decomposition of the monazite matrix and liberation of REE species. The optimized process achieved a maximum cerium recovery of 89.97% under controlled conditions. The resulting alkaline leachate was subjected to sequential acid purification (HCl and HNO₃) followed by controlled pH adjustment (pH 3<b>-</b>4.5), facilitating preferential cerium separation from co-existing rare earth elements. Final precipitation at pH 11 and subsequent reaction with monoammonium phosphate (NH₄H₂PO₄) yielded an amorphous cerium phosphate precursor, which was calcined at 1000 °C to obtain crystalline CePO₄ with 93.71% purity. The crystalline phases, morphology, and chemical composition of the products were characterized by X-ray diffraction, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and X-ray fluorescence spectroscopy. The proposed process demonstrates an effective approach for the selective precipitation of cerium and provides a feasible hydrometallurgical strategy for the utilization of Mongolian monazite resources.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752344","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":"Enhanced photocatalytic degradation of methylene blue using RGO–ZnO nanocomposites synthesized via hydrothermal route","authors":"Zainab bibi,&nbsp;Shoug M. Alghamdi,&nbsp;Adnan Ali,&nbsp;Shaimaa A. M. Abdelmohsen,&nbsp;Mohamed Abdelsabour Fahmy,&nbsp;Muhammad Daud Rafique,&nbsp;Romulo R. Macadangdang Jr.,&nbsp;Abdulaziz M. Alanazi,&nbsp;Ahmed Waqas,&nbsp;Arslan Ashfaq","doi":"10.1007/s11243-026-00772-9","DOIUrl":"10.1007/s11243-026-00772-9","url":null,"abstract":"<div><p>The growing release of hazardous organic pollutants into aquatic environments has intensified the demand for efficient and environmentally sustainable photocatalysts for wastewater remediation. In this work, ZnO nanoparticles, rGO, and rGO–ZnO nanocomposite were successfully synthesized through hydrothermal approach and evaluated for the photocatalytic degradation of methylene blue under UV irradiation. Graphene oxide was initially prepared using modified Hummers method and then reduced to rGO with hydrazine hydrate before composite fabrication. The structural, morphological, and optical properties of the synthesized materials were systematically characterized by XRD, SEM, Raman, and UV–Vis spectroscopy. XRD analysis confirmed the successful formation of hexagonal wurtzite ZnO and the incorporation of graphitic carbon within the composite, whereas Raman spectra verified the effective reduction of GO and the preservation of the ZnO crystal structure after hybridization. SEM images revealed the uniform anchoring of ZnO nanoparticles on the wrinkled rGO sheets, demonstrating strong interfacial integration between the two components. UV–Vis spectroscopy showed enhanced light absorption for the rGO-ZnO nanocomposite compared with pristine ZnO and rGO. Photocatalytic studies demonstrated degradation efficiencies of 79.59%, 92.71%, and 98.60% for ZnO, rGO, and the rGO–ZnO nanocomposite, respectively, after 60 min of UV irradiation. The degradation kinetics followed pseudo-first-order model, with the rGO–ZnO nanocomposite exhibiting the highest apparent rate constant. The best photocatalytic performance is attributed to the synergistic interaction between ZnO and rGO, which enhances light harvesting, facilitates charge separation, and suppresses electron–hole recombination. These findings demonstrate that the hydrothermally synthesized rGO-ZnO nanocomposite is efficient and promising photocatalyst for the removal of organic dye contaminants from wastewater.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752343","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":"Chromene–hydrazinopyridine schiff base for selective UV–Vis detection of Cu2+ and a reversible INHIBIT logic gate","authors":"V. Vanie,&nbsp;R. Kavitha","doi":"10.1007/s11243-026-00762-x","DOIUrl":"10.1007/s11243-026-00762-x","url":null,"abstract":"<div><p>A novel chromene–hydrazinopyridine-based Schiff base probe, (E)-3-((2-(pyridin-2-yl)hydrazono)methyl)-4H-chromen-4-one (P), was synthesized via the condensation of 3-formylchromone and 2-hydrazinopyridine in a 1:1 molar ratio and characterized using ¹H NMR, ¹³C NMR, and HR-MS. The selectivity of probe P toward a broad range of biologically and environmentally relevant metal ions was evaluated by UV–Vis spectroscopy in a CH₃CN: H₂O (1:1, v/v) medium at room temperature. The free probe exhibited a prominent absorption band at 285 nm, which diminished upon addition of Cu²⁺ ions, while a new band appeared at 350 nm, corresponding to a ligand-to-metal charge transfer (LMCT) process. Job’s plot analysis and ESI-MS data confirmed a 1:1 binding stoichiometry between P and Cu²⁺ ions. The binding constant and limit of detection (LOD) were determined to be 5.43 × 10⁴ M⁻¹ and 0.61 µM, respectively, indicating high sensitivity. The reversibility of the P–Cu²⁺ complex was demonstrated through the addition of EDTA, which triggered the reversible disappearance and reappearance of the absorption band at 350 nm. Furthermore, this reversible behavior was exploited to construct an INHIBIT molecular logic gate, highlighting the potential of the chromene–hydrazinopyridine-based probe P for selective, reusable, and logic-based Cu²⁺ sensing.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752345","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":"Ternary applications of hydrothermally synthesised ZrO2 nanoparticles: A study on pseudocapacitive behavior, photocatalysis, and antibacterial activity","authors":"M Priyadharshini,&nbsp;L Balu,&nbsp;R Ezhil Pavai","doi":"10.1007/s11243-026-00769-4","DOIUrl":"10.1007/s11243-026-00769-4","url":null,"abstract":"<div><p>ZrO₂ nanoparticles were synthesised via a facile hydrothermal technique followed by thermal annealing and systematically investigated for multifunctional applications. Annealing induced phase transformation from cubic to monoclinic zirconia and significantly influenced the structural, morphological, optical and functional properties of the samples. Structural characterisation confirmed crystallite sizes of 14, 35 and 47 nm for Z2, Z2-700 and Z2-800 samples, respectively. The Rietveld refinement revealed the chi-square (χ²) of the Z2-700 sample was 0.94. HRTEM with SAED confirmed the polycrystalline nature of the sample with a crystallite size of 32 nm, consistent with XRD analysis. FT-IR revealed the functional groups of the samples, stretching and bending vibrations observed in the fingerprint region ranging from 504 to 869 cm^− 1. Morphological analysis, manifested quasi-spherical nanoparticles with uniform elemental composition of Zr and O in the samples. Optical studies showed strong UV absorption with band-gap energies of 5.1 eV for Z2-700 and 4.5 eV for Z2-800, while photoluminescence analysis indicated the presence of oxygen vacancies and defect-related emission centers. Among all the samples, Z2-700 was optimised due to its favourable crystallinity, suitable band-gap, enhanced surface activity and efficient charge transport. The oxidation states of Zr and O were analysed using XPS. The optimised Z2-700 exhibited promising electrochemical performance and good specific capacitance (176 F g⁻¹), with capacitance retention increasing by up to 18% after 1300 cycles. Photocatalytic experiments demonstrated effective degradation of rhodamine B (66%) and methylene blue (73%) dyes under sunlight irradiation, following Langmuir-Hinshelwood kinetics along with notable antibacterial activity against the Gram-negative Bacteria <i>K. pneumonia</i>, achieving a 22 mm zone of inhibition. These experimentally examined results revealed the potential of thermally engineered ZrO₂ nanoparticles as multifunctional materials for energy storage, environmental remediation and antibacterial applications.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751914","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":"Zinc ferrite photocatalytic systems for UV-A-Induced effective removal of the emerging water contaminant clofibric acid: activity, kinetics, mechanism and stability assessment","authors":"Samy Siamer,&nbsp;Souad Bouafia,&nbsp;Veronique Alonzo,&nbsp;Asma Hemmi,&nbsp;Mohamed Trari,&nbsp;Dominique Wolbert,&nbsp;Lidia Favier","doi":"10.1007/s11243-026-00767-6","DOIUrl":"10.1007/s11243-026-00767-6","url":null,"abstract":"<div><p>Zinc ferrite (ZnFe₂O₄) spinel nanomaterials were successfully synthesized via the sol-gel method followed by thermal treatments in the range of 400–800 °C. X-ray diffraction analysis revealed that the pure phase was obtained only for the sample calcined at 800 °C. For the other samples, the presence of a mixture with zinc oxide and Fe₂O₃ was observed. The photocatalytic activity of ZnFe₂O₄ systems was evaluated under UV-A irradiation for the degradation of clofibric acid (CA), a persistent pharmaceutical contaminant widely detected in wastewater, surface water, and sediments. The sample calcined at 800 °C showed excellent photocatalytic performance in the elimination of the target molecule and was characterized using a variety of techniques, including infrared spectroscopy, diffuse reflectance spectroscopy, scanning electron microscopy, and energy-dispersive spectroscopy. The effect of various photocatalytic process parameters was explored. Optimal photocatalytic conditions (6.3 mW/cm² irradiation, 0.5 g/L catalyst dose, and 5 mg/L pollutant concentration) led to complete CA removal and about 71% mineralization within 420 min. Scavenger tests identified the main reactive species involved in the oxidation of the target molecule. Along with high efficiency, the system demonstrated excellent stability, facile separation, reusability, and low electrical energy consumption, underscoring future environmental applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751786","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, characterization, crystal structures and urease inhibition of CuII, CoII and ZnII complexes derived from N’-(5-chloro-2-hydroxybenzylidene)-3-methylbenzohydrazide","authors":"Yang-Lei Li,&nbsp;Yao-Yao Cao,&nbsp;Jin Mu,&nbsp;Yu-Qun Ye,&nbsp;Da-Hua Shi,&nbsp;Yu-Qing Gu,&nbsp;Zhong-Lu You","doi":"10.1007/s11243-026-00768-5","DOIUrl":"10.1007/s11243-026-00768-5","url":null,"abstract":"<div><p>Hydrazone compounds have a wide range of biological activities and play an important role in coordination chemistry. In this study, four new copper(II), cobalt(II) and zinc(II) complexes, [Cu₂L₂(ONO₂)₂] (<b>1</b>), [Co₂L₂(EtOH)₂(OH₂)₂](NO₃)₂ (<b>2</b>), [Co₂L₂(EtOH)₂(OH₂)₂]Cl₂ (<b>3</b>) and [ZnL₂]_n (<b>4</b>), where L is the deprotonated <i>N’</i>-(5-chloro-2-hydroxybenzylidene)-3-methylbenzohydrazide (HL), were prepared and structurally characterized. Molecular structures of the complexes were determined by single crystal X-ray diffraction. Complexes <b>1</b>, <b>2</b> and <b>3</b> are dinuclear structures, and complex <b>4</b> is a polymeric structure. The tridentate hydrazone ligands in the complexes chelate to the metal centers through imino N, phenolate and carbonyl O atoms. Inhibitory effect of the four complexes on <i>Jack bean</i> urease was assayed. As a result, the copper(II) complex exhibited the best inhibitory effect (IC₅₀ = 1.1 ± 0.3 µmol L^–1), while the two cobalt(II) complexes showed moderate effects, and the zinc(II) complex had no activity.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751939","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}