Inorganic Chemistry Communications最新文献

{"title":"Nanozyme-based remediation of complex wastewater streams: a focus on emerging contaminants","authors":"Sunendu Nayak ,&nbsp;Surendra Hansdah ,&nbsp;Shushree Prachi Palai ,&nbsp;Goutam Chandra Malik ,&nbsp;Bhagirathi Singh ,&nbsp;Derek Fawcett ,&nbsp;Gerrard Eddy Jai Poinern ,&nbsp;Pankaj Kumar Parhi","doi":"10.1016/j.inoche.2026.116268","DOIUrl":"10.1016/j.inoche.2026.116268","url":null,"abstract":"<div><div>The increasing prevalence of water pollution, driven by contaminants such as heavy metals, dyes, pharmaceuticals, and microplastics, necessitates innovative approaches to wastewater treatment. Nanozymes-synthetic nanomaterials with enzyme-like catalytic properties - have emerged as a promising alternative to conventional enzymes due to their superior stability, tunable activity, and cost-effective production. This review provides a comprehensive analysis of nanozyme synthesis methods, including chemical, biological, green, and physical approaches, alongside their catalytic mechanisms such as reactive oxygen species (ROS) generation and redox reactions. Applications of nanozymes in degrading organic pollutants, heavy metals, and emerging contaminants like microplastics are critically examined. This includes degradation of persistent and emerging contaminants such as pharmaceuticals and microplastics, which pose significant challenges to conventional treatment methods. Special attention is given to metal-organic frameworks (MOFs) as synergistic supports that enhance nanozyme performance through improved stability and pollutant specificity. Furthermore, the integration of nanozymes into existing wastewater treatment technologies is explored, highlighting their potential for scalability and environmental sustainability. While many challenges remain, regarding long-term environmental impacts and large-scale implementation, this review underscores the transformative potential of nanozymes in addressing global water pollution. By bridging the gap between fundamental research and practical applications, this study aims to inspire future innovations in sustainable water management.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116268"},"PeriodicalIF":5.4,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146096024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoengineering approach as a tool for enhancing the anticancer activity of alkynyl Au(I) complexes with cyclic P2N2 ligands","authors":"Bulat A. Faizullin ,&nbsp;Irina R. Dayanova ,&nbsp;Elizaveta M. Shibetskaya ,&nbsp;Igor A. Litvinov ,&nbsp;Alexandra D. Voloshina ,&nbsp;Anna P. Lyubina ,&nbsp;Elena V. Grachova ,&nbsp;Igor D. Strelnik ,&nbsp;Andrey A. Karasik ,&nbsp;Asiya R. Mustafina","doi":"10.1016/j.inoche.2026.116235","DOIUrl":"10.1016/j.inoche.2026.116235","url":null,"abstract":"<div><div>In this study, we demonstrate structural variation at the molecular, supramolecular and nanoscale levels as a tool for modifying the anticancer activity of alkynyl (C ≡ CR') Au(I) complexes with P₂N₂ (1,5-diaza-3,7-diphosphacyclooctane) ligands. The molecular structure is varied in a series of newly synthesized five Au(I) complexes with different substituents in the P₂N₂ and C ≡ CR' ligands, respectively. Due to the low solubility of these complexes in water, they were transformed into hydrophilic colloids using two different approaches, thus resulting in the formation of either core-shell, where the complexes aggregate to form solid cores, or micellar nanoparticles (NPs), in which the complexes are incorporated into a non-polar micellar core. The hydrophilic surface of both types of NPs is due to either aggregation of Pluronic F127 or its mixed aggregation with Pluronic P123. Incorporation of the complexes into the non-polar core of micelles can be considered as a more effective way to ensure their stability in an aqueous environment compared to the inclusion of these complexes into a solid core. It has been shown that Au(I) alkynyl complexes exhibit lower anticancer activity when incorporated into solid cores compared to Pluronic micelles. Moreover, the anticancer activity of these complexes can be further enhanced by altering the structure of the Pluronic components in the micelles. The achieved anticancer activity of the complexes does not correlate with the level of intracellular reactive oxygen species (ROS) formation. This suggests that altering the properties of Pluronic-based micelles can be considered a powerful tool for modifying the anticancer activity of the Au(I) complexes within them.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116235"},"PeriodicalIF":5.4,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new organotin–copper(I) cyanide supramolecular coordination polymer incorporating dipyridylamine: Crystal structure and anticancer activity evaluation","authors":"Mohamed M. El-bendary ,&nbsp;Ehab M.M. Ali ,&nbsp;Bambar Davaasuren ,&nbsp;Mariusz Jaremko","doi":"10.1016/j.inoche.2026.116249","DOIUrl":"10.1016/j.inoche.2026.116249","url":null,"abstract":"<div><div>The self-assembly of Me₃SnCl and 2,2′-dipyridylamine (dpa) with K₃[Cu(CN)₄] at room temperature afforded a new organotin bimetallic supramolecular coordination polymer, <strong>[Me₃SnCu₂(CN)₃(dpa)₂], (SCP 1)</strong>, which crystallizes as orange platelets from an aqueous acetonitrile solution. Elemental analysis, IR spectroscopy, electronic absorption, and ¹H and ¹³C NMR spectroscopy were used to describe <strong>SCP 1</strong> comprehensively. The <strong>SCP 1</strong>'s crystal structure was clearly confirmed using single-crystal X-ray diffraction. The anionic [Cu₂(CN)₃]⁻ units in <strong>SCP 1</strong> are bridged by the Me₃Sn⁺ cations to generate one-dimensional zigzag chains. Each Cu(I) center is coordinated by two cyanide ligands and two nitrogen atoms from a dpa ligand, adopting a distorted tetrahedral geometry in <strong>SCP 1</strong>. The tin atom is bonded to three methyl groups and two cyanide ligands, forming a trigonal bipyramidal coordination environment. The 1D zigzag chains are further interconnected through strong hydrogen-bonding interactions to form two-dimensional layers. Additional π–π stacking interactions between the pyridine rings of the dpa ligands reinforce the packing and lead to a 3D supramolecular network. The luminescence properties of <strong>SCP 1</strong> and the free dpk ligand were examined and compared. The present study discusses the investigation of the cytotoxicity of a bimetallic organotin copper cyanide, <strong>SCP 1,</strong> on liver, colon, and breast cancer cell lines. <strong>SCP 1</strong> showed significant cytotoxicity, with reduced IC₅₀ values and elevated selectivity indices (SI) against HCT116 and MDA-MB-231 compared with HepG2. Treatment of HCT116 cells with the <strong>SCP 1</strong> at half the IC₅₀ concentration triggered apoptosis, resulting in 21.3% early and 24.9% late apoptotic populations, and promoted cell cycle arrest at the G2/M phase, thereby reducing proliferation and facilitating programmed cell death. These findings emphasize the significant anti-proliferative potential of the <strong>SCP 1</strong> and support its future assessment as a possible chemotherapeutic approach.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116249"},"PeriodicalIF":5.4,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anchoring NiCo alloys onto N-doped carbon spheres for enhanced electrocatalytic hydrogen evolution reaction","authors":"Fan Wang ,&nbsp;Yu Zhang ,&nbsp;Hu Zhou ,&nbsp;Chunfeng Meng ,&nbsp;Yanxin Qiao ,&nbsp;Biao Hu","doi":"10.1016/j.inoche.2026.116250","DOIUrl":"10.1016/j.inoche.2026.116250","url":null,"abstract":"<div><div>Ni-ZIF-67 nanocrystals are hydrothermally grown on polydopamine (PDA) spheres, followed by pyrolysis to yield N-doped carbon sphere-supported NiCo alloy nanoparticles (NiCo@NCS). Systematic characterizations demonstrate that Ni doping is crucial for promoting the electrocatalytic activity toward hydrogen evolution reaction (HER). The NiCo@NCS catalyst exhibits high HER performance, achieving a low overpotential of 276 mV at 10 mA cm⁻², a favorable Tafel slope of 110 mV dec⁻¹, and exceptional stability. This performance enhancement originates from the synergistic coupling of homogeneously dispersed NiCo alloy nanoparticles, accelerated charge transfer kinetics, and ‌hierarchical pore structure.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116250"},"PeriodicalIF":5.4,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the performance of photoelectrochemical water splitting using zinc oxide nanorod through UV-Ozone treatment","authors":"Liszulfah Roza ,&nbsp;Vivi Fauzia ,&nbsp;Razin Sabil Asy'tada ,&nbsp;Murni Handayani ,&nbsp;Osi Arutanti ,&nbsp;Rahmat S. Mohar ,&nbsp;M.Y.A. Rahman","doi":"10.1016/j.inoche.2026.116247","DOIUrl":"10.1016/j.inoche.2026.116247","url":null,"abstract":"<div><div>This study investigates the effect of UV/Ozone (UVO) treatment on the photoelectrochemical water splitting (PECWS) using ZnO nanorods (NRs) as photocatalyst. ZnO NRs are recognized as an efficient semiconductor material for PECWS due to their outstanding properties and low cost. The UVO treatment was applied with irradiation times varying from 0 to 15 min to enhance the morphological and optical properties of ZnO NRs. The application of UVO treatment is found to significantly enhance the performance of the PECWS by increasing the density of oxygen vacancies (VO), which improves light-induced electron generation and separation. The variation of the UVO irradiation time led to the decrease in the NRs size, and improved optical properties, such as enhanced absorbance and photoluminescence (PL) emission, leading to significantly improved PEC activity. Among the treated samples, the UVO-10 treatment exhibited significant improvement in the PEC performance with the highest photocurrent density (<em>J</em>_ph) of 0.239 mAcm⁻² at 1.23 V vs. RHE under AM 1.5G illumination. This sample also yielded the highest applied bias photon-to-electron efficiency (<em>ABPE</em>) with the value of 0.059% at a bias voltage of 0.857 V vs. RHE. However, extended UVO treatment time led to the formation of oxygen interstitials (Oi) by accelerating photocatalytic degradation. The findings highlight the critical balance needed in UVO treatment duration to achieve optimal performance while avoiding detrimental defects. This study provides valuable insights for refining treatment protocols and advancing the development of efficient ZnO-based PECWS.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116247"},"PeriodicalIF":5.4,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Precursor structure as ingredient controller in CdS/nitrogen-doped carbon composite syntheses and their effect on the catalytic degradation of RhB","authors":"Bo Zhao ,&nbsp;Senlin Li ,&nbsp;Haitao Liu ,&nbsp;Xingyang Zhong ,&nbsp;Qiaozhen Sun ,&nbsp;Bingguang Zhang","doi":"10.1016/j.inoche.2026.116239","DOIUrl":"10.1016/j.inoche.2026.116239","url":null,"abstract":"<div><div>The constitutes and performances of sinters are affected by many factors when using coordination polymers as precursors in photocatalytic degradation. However, the structural impact of coordination polymer is not involved. Herein, the cadmium compound, [Cd (sip)(dpa)(H₂O)]_n (Cd-SD), is carefully selected as a precursor because it contains the same elements as that of [Cd(Hsip)(HL₁)(H₂O)₂·2(H₂O)]_n (Cd-CP), which we previously reported but displays different structure and elemental contents. Through in-situ carbonization, CdS/nitrogen doped carbon (CdS/NC-T) composite instead of CdS-CdO/NC-T was generated, and a lot of CdS nanostrips emerged at 600 °C. PXRD and TEM confirmed the formation of hexagonal wurzite CdS nanoparticles on nitrogen-doped carbonaceous scaffolds. The degradation efficiency of Rhodamine B (RhB) by the CdS/NC-600 composites under visible irradiation reached ca. 90% within 2 h. The trapping experiment manifested that the photogenerated h⁺ and ·OH were crucial factors in RhB removal. The results implied that the elemental content of the precursor was a crucial factor to determine the photocatalytic performance of CdS/NC-T.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116239"},"PeriodicalIF":5.4,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-stoichiometric three dimensional (Ni,Cd)S hybrid electrodes for high performance supercapacitor application","authors":"Uroosa Riaz ,&nbsp;Gul Rahman ,&nbsp;Sang Youn Chae ,&nbsp;Anwar ul Haq Ali Shah","doi":"10.1016/j.inoche.2026.116244","DOIUrl":"10.1016/j.inoche.2026.116244","url":null,"abstract":"<div><div>Bimetallic sulfide nanostructures have recently been explored as supercapacitor electrodes owing to their high electrical conductivity and pseudocapacitive characteristics. This work focuses on the preparation of bimetallic nickel cadmium sulfide (Ni,Cd)S with different Ni/Cd ratios using the hydrothermal method for supercapacitor application. The X-ray diffraction spectra indicated both nickel and cadmium sulfide phases at higher cadmium content. The surface morphology of the (Ni,Cd)S assumed distorted spherical shape, well-differentiated from the NiS₂ and CdS. The charge storage capability of the NiS₂, CdS, and (Ni,Cd)S with Ni/Cd ratios of 1:1, 1:2, and 1:5 was evaluated with electrochemical testing. From the CV curves, the specific capacitance of NiS₂, CdS, (Ni,Cd)S-(1:1), (Ni,Cd)S-(1:2), (Ni,Cd)S-(1:5) at a scan rate of 10 mV∙s⁻¹ were calculated as 491.76, 325.92, 589.18, 696.79, and 580.56 F∙g⁻¹, respectively. The (Ni,Cd)S-(1:2) electrode exhibited superior performance to others, which was further confirmed from GCD profiles with the highest specific capacity (48.26 mAh∙g⁻¹), energy density (17.01 Wh∙kg⁻¹), and power density (1762 W∙kg⁻¹). To assess the real-world application, the best performing sample (Ni,Cd)S-(1:2) was assembled into a two-electrode symmetric supercapacitor device, which delivered appreciable energy and power densities (0.856 Wh∙kg⁻¹;441.6 W∙kg⁻¹). This high charge storage performance is due to the facilitated charge accommodation and transport of the highly active surface of the (Ni,Cd)S-(1:2) electrode, indicating its potential for next-generation power devices.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116244"},"PeriodicalIF":5.4,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, optoelectronic, and photoluminescence study in Ni-doped SnO2 nanomaterials: experimental and theoretical correlation","authors":"O. AitMellal ,&nbsp;M.Y. Messous ,&nbsp;S. Dahri ,&nbsp;S. Ait Bouzid ,&nbsp;Y. Chrafih ,&nbsp;M. Ait Oufakir ,&nbsp;M. Manoua ,&nbsp;A. Jabar","doi":"10.1016/j.inoche.2026.116246","DOIUrl":"10.1016/j.inoche.2026.116246","url":null,"abstract":"<div><div>This work reports the synthesis and characterization of Ni-doped SnO₂ nanomaterials (0–5% Ni) investigated by combining experimental techniques with DFT calculations. Rietveld refined X-ray diffraction (XRD) identified the rutile tetragonal structure for all samples, with a reduction in crystallite size from ∼33 to 17 nm and small increase in cell volume upon Ni incorporation. Fourier transform infrared (FTIR) spectra indicated preservation of the main Sn-O vibrational modes with minimal shifts. Transmission electron microscopy (TEM) images showed quasi-spherical nanoparticles with a systematic size reduction upon doping. Energy-dispersive X-ray (EDX) and X-ray fluorescence (XRF) confirmed the expected elemental composition and homogenous Ni incorporation. UV–Vis spectra and DFT revealed strong UV absorption accompanied by a monotonic band gap narrowing, indicating preserved electronic integrity. The photoluminescence (PL) results exhibited defect-related emissions that enhance charge transport. The interplay of morphology, structure, and optical response verifies controlled band-structure design through Ni doping. The coupled properties make Ni-doped SnO₂ a promising material for UV-optoelectronic devices.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116246"},"PeriodicalIF":5.4,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of copper(II) complexes on increase in lifespan and mean survival of gld-1 mutant strain JK1466 in Caenorhabditis elegans","authors":"Rathinasabapathi Prabhakaran ,&nbsp;Sunder Nandhini ,&nbsp;Chennakrishnan Elamathi ,&nbsp;Govindan Thiruppathi ,&nbsp;Horst Puschmann ,&nbsp;Palanisamy Sundararaj","doi":"10.1016/j.inoche.2026.116238","DOIUrl":"10.1016/j.inoche.2026.116238","url":null,"abstract":"<div><div>Square planar copper(II) complexes containing 7-methyl-2-oxo-1,2-dihydroquinoline-3-carboxaldehyde thiosemicarbazones were synthesized and structurally characterized by using various spectro-analytical techniques. Single crystal X-ray diffraction analysis of complexes P1 and P3 confirmed the mode of attachment of ligands. The binding affinity of the ligands and complexes with nucleic acid and albumin were studied by taking CT-DNA and BSA as models. The new complexes were subjected to screen their in vivo cytotoxic potential by taking <em>C. elegans</em> as suitable choice due to their sequenced genome and easy mutation production. Exposure of the complexes <strong>P1-P4</strong> to the worms, up to 75 μM concentration it was found that there were no adverse effect in the physiological functions. Furthermore, the reduction in the tumor growth was confirmed by the DAPI/AO staining and the lifespan of gld-1 mutant strain JK1466 has been increased significantly with a mean survival increase of 66.4%. The stress tolerance or longevity was directly related to the anti-oxidant enzymes which can be quantified by GFP reporter strains. Under oxidative stress, as compared with the control, the relative mean fluorescence intensity of mutant worms was increased around 70–72% and 60–64% in <em>sod-3</em> and <em>hsp-16.2</em> expressions respectively. Interestingly, all the complexes <strong>P1-P4</strong> have shown their potent effect on cytotoxic properties, physiological changes and also reduction in the tumor growth and there were no significant differences in their activity were found. Altogether, the research findings recommended that the candidature of the complexes <strong>P1</strong>-<strong>P4</strong> to use as anti-tumor drugs based on further explorations.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116238"},"PeriodicalIF":5.4,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic behavior, spin transitions, and magnetocaloric effect in europium orthoferrite EuFeO₃ nanoparticles synthesized by solid-state reaction","authors":"Y. Errouyessi ,&nbsp;H. Lassri ,&nbsp;S. Colis ,&nbsp;R. Moubah","doi":"10.1016/j.inoche.2026.116224","DOIUrl":"10.1016/j.inoche.2026.116224","url":null,"abstract":"<div><div>We present a comprehensive investigation of the structural, magnetic and magnetocaloric properties of europium orthoferrite <span><math><mtext>EuFe</mtext><msub><mi>O</mi><mn>3</mn></msub></math></span> nanoparticles. X-ray diffraction analysis confirms that the compound crystallizes in a single-phase orthorhombic perovskite structure belonging to the <em>Pbnm</em> space group. The sample exhibits an average crystallite size of 43.6 nm. Europium orthoferrite exhibits an antiferromagnetic ordering of Fe³⁺ spins, accompanied by a weak ferromagnetic component induced by the Dzyaloshinskii–Moriya (DM) interaction. Such an interaction induces a slight deviation from the ideal antiparallel alignment of magnetic moments within the antiferromagnetic sublattices, giving rise to a spin-flop transition (SFT) and a small residual ferromagnetic moment. Special attention has been devoted to the spin-reorientation (SR) transitions, analyzed through the magnetocaloric effect (MCE) as a highly sensitive probe. The temperature evolution of the magnetic entropy change <span><math><mo>−</mo><mo>∆</mo><msub><mi>S</mi><mi>M</mi></msub></math></span> exhibits positive maximum values corresponding to a normal MCE near the two SR temperatures, <span><math><msub><mi>T</mi><mrow><mi>SR</mi><mn>1</mn></mrow></msub><mo>=</mo><mn>30</mn><mi>K</mi></math></span> and <span><math><mspace></mspace><msub><mi>T</mi><mrow><mi>SR</mi><mn>2</mn></mrow></msub><mo>=</mo><mn>180</mn><mi>K</mi></math></span>, whereas a negative MCE (negative <span><math><mo>−</mo><mo>∆</mo><msub><mi>S</mi><mi>M</mi></msub></math></span> values) emerges around <em>T</em> = 60 K. Such findings confirm the occurrence of a SR transition with a metamagnetic signature, emphasizing the complex magnetic nature inherent in this orthoferrite system. Analyses of the temperature dependence of the critical exponent <span><math><mi>n</mi><mfenced><mi>T</mi></mfenced></math></span> under various applied magnetic fields further validates the observed transitions and provides deep insight into their intrinsic nature. Moreover, the construction of a universal phenomenological curve, achieved by normalizing each isofield <span><math><mo>−</mo><mo>∆</mo><msub><mi>S</mi><mi>M</mi></msub><mfenced><mi>T</mi></mfenced></math></span> curve, offers additional confirmation of the type and order of these magnetic transitions. Overall, these results highlight the important role of the Dzyaloshinskii–Moriya interaction in stabilizing weak ferromagnetism in <span><math><mtext>EuFe</mtext><msub><mi>O</mi><mn>3</mn></msub></math></span>, while demonstrating the reliability and sensitivity of the magnetocaloric approach as a powerful method for probing subtle SR and metamagnetic phenomena in rare-earth orthoferrites.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116224"},"PeriodicalIF":5.4,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}