Dalton Transactions最新文献

{"title":"A novel red phosphor Ba3La2W2O12:Eu3+ with intense 5D0-7F4 transition and excellent thermal stability for white LEDs.","authors":"Fei Wang,Huihui Chen","doi":"10.1039/d5dt01523e","DOIUrl":"https://doi.org/10.1039/d5dt01523e","url":null,"abstract":"Red-emitting phosphors with high thermal stability are of great significance for improving the performance of phosphor-converted white light-emitting diodes (pc-WLEDs). A series of Ba3La2W2O12:xEu3+ (BLWO:xEu3+, 0 ≤ x ≤ 0.12, Δx = 0.02) red phosphors excitable by UV-near UV and blue light were successfully synthesized via high-temperature solid-state reaction. The crystal structure, micromorphology, and optical properties of the BLWO:Eu3+ phosphor were systematically investigated. The emission spectrum of the BLWO:Eu3+ phosphor is dominated by the red emission at 616 nm originating from the electric dipole 5D0 → 7F2 transition of Eu3+. Notably, the 5D0 → 7F4 emission at 702 nm exhibits remarkable intensity, reaching approximately 70% of the strongest 5D0 → 7F2 emission (616 nm). The optimal Eu3+ doping concentration in the BLWO:Eu3+ phosphor was determined to be 0.06, with the concentration quenching mechanism governed by electric quadrupole-quadrupole (q-q) interactions. The BLWO:0.06Eu3+ phosphor demonstrates excellent quantum efficiencies with an internal quantum efficiency (IQE) of 62.91% and an external quantum efficiency (EQE) of 35.23%, along with outstanding thermal stability. Benefiting from these superior properties, the phosphor was successfully employed in WLED fabrication. The resulting device exhibits warm white light with CIE 1931 chromaticity coordinates of (0.3453, 0.3518) and a high color rendering index (Ra) of 80.3.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"56 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083593","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":"CoFe−FF Derived CoFe Alloy@N, P-Doped Carbon Composites: Preparation and Zinc-Air Battery Performance Evaluation","authors":"Feng Wen, Qihao Wu, Heju Gao, Chunyan Wu, Guan-Cheng Xu, Li Zhang","doi":"10.1039/d5dt01723h","DOIUrl":"https://doi.org/10.1039/d5dt01723h","url":null,"abstract":"Developing efficient bifunctional catalysts for air cathodes is crucial for enhancing the performance of zinc-air batteries (ZABs). In this study, we synthesized N, P-codoped carbon-coated CoFe alloy nanoparticles (CoFe@NPC−1) using a one-step high-temperature pyrolysis method. The precursor was cobalt-iron formic acid framework (CoFe−FF), while dicyandiamide served as the nitrogen source and phytic acid as the phosphorus source. The resulting electrocatalyst exhibited a half-wave potential of 0.83 V in 0.1 M KOH for the oxygen reduction reaction (ORR) and an overpotential of 310 mV for the oxygen evolution reaction (OER) in 1 M KOH. A zinc-air battery assembled with a CoFe@NPC−1 air cathode demonstrated an open-circuit voltage of 1.40 V and a specific capacity of 700.8 mAh g−1, showcasing superior durability compared to the Pt/C+RuO2 catalyst. The satisfactory bifunctional catalytic activity of this simple composition can be attributed to the synergistic effect between the N and P elements, which effectively regulate the electrons around carbon atoms, as well as the bimetallic CoFe alloy. This study provides novel methods and insights for synthesizing CoFe alloy composite N, P-doped porous carbon as highly efficient electrocatalysts for the oxygen reduction reaction.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"4 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083878","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":"Inverse Effect of Covalently Attached Electron-Proton Transfer Mediator in Oxygen Reduction Reaction","authors":"Anjila I. Siddiqui, Sanyam ., Rupesh Nain, Anirban Mondal, Biswajit Mondal","doi":"10.1039/d5dt01227a","DOIUrl":"https://doi.org/10.1039/d5dt01227a","url":null,"abstract":"In this work, the BQ/H2Q electron-proton-transfer mediator (EPTM) was covalently attached to the salophen ligand (Sal-H2Q), and its iron complex Fe(Sal-H2Q) was compared for ORR activity with the salophen complex of iron without the EPTM, using acetic acid as the external proton source in acetonitrile. The rate of ORR was found to be much higher for Fe(Sal), giving a peak current of 222 µA, while for Fe(Sal-H2Q) it was 115 µA at a similar potential. Selectivity measurements revealed that both catalysts show selective water formation. This observation holds for other solvent systems as well. The findings in this study are contrary to the general observation that covalent attachment of BQ/H2Q EPTM enhances the ORR reactivity.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"81 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083879","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":"Manganese germylene hydride complexes: reactivity with carbon dioxide, benzophenone, and diisopropylcarbodiimide","authors":"Jeffrey S. Price, David J. H. Emslie","doi":"10.1039/d5dt01701g","DOIUrl":"https://doi.org/10.1039/d5dt01701g","url":null,"abstract":"Reactions of bis(hydrocarbyl)germylene manganese(<small>I</small>) hydride complexes [(dmpe)<small><sub>2</sub></small>MnH(<img alt=\"[double bond, length as m-dash]\" border=\"0\" src=\"https://www.rsc.org/images/entities/char_e001.gif\"/>GeR<small><sub>2</sub></small>)] (<strong>1a</strong>: R = Ph, <strong>1b</strong>: R = Et) with carbon dioxide yielded the previously reported carbonyl formate complex [(dmpe)<small><sub>2</sub></small>Mn(κ<small><sup>1</sup></small>-O<small><sub>2</sub></small>CH)(CO)] (<strong>3</strong>) <em>via</em> the unstable κ<small><sup>2</sup></small>-formatogermyl intermediates [(dmpe)<small><sub>2</sub></small>Mn{κ<small><sup>2</sup></small>-GeR<small><sub>2</sub></small>(OCHO)}] (<strong>5a</strong>: R = Ph, <strong>5b</strong>: R = Et). By contrast, addition of CO<small><sub>2</sub></small> to [(dmpe)<small><sub>2</sub></small>MnH(<img alt=\"[double bond, length as m-dash]\" border=\"0\" src=\"https://www.rsc.org/images/entities/char_e001.gif\"/>Ge<small><sup><em>n</em></sup></small>BuH)] (<strong>2a</strong>), which contains a terminal GeH substitutent, resulted in the sequential formation of (i) the formatogermylene hydride complex [(dmpe)<small><sub>2</sub></small>MnH{<img alt=\"[double bond, length as m-dash]\" border=\"0\" src=\"https://www.rsc.org/images/entities/char_e001.gif\"/>Ge<small><sup><em>n</em></sup></small>Bu(κ<small><sup>1</sup></small>-O<small><sub>2</sub></small>CH)}] (<strong>6</strong>), (ii) the isolable metallacyclic κ<small><sup>2</sup></small>-formatogermyl complex [(dmpe)<small><sub>2</sub></small>Mn{κ<small><sup>2</sup></small>-Ge<small><sup><em>n</em></sup></small>Bu(κ<small><sup>1</sup></small>-O<small><sub>2</sub></small>CH)(OCHO)}] (<strong>7</strong>), and with heating(<small>III</small>) complex <strong>3</strong>. Exposure of <strong>2a</strong> to benzophenone also afforded a new germylene hydride complex, [(dmpe)<small><sub>2</sub></small>MnH{<img alt=\"[double bond, length as m-dash]\" border=\"0\" src=\"https://www.rsc.org/images/entities/char_e001.gif\"/>Ge<small><sup><em>n</em></sup></small>Bu(OCHPh<small><sub>2</sub></small>)}] (<strong>8</strong>). Reactions of <strong>1a–b</strong> and <strong>2a</strong> with C(N<small><sup>i</sup></small>Pr)<small><sub>2</sub></small> afforded a family of stable metallacyclic κ<small><sup>2</sup></small>-amidinylgermyl complexes [(dmpe)<small><sub>2</sub></small>Mn{κ<small><sup>2</sup></small>-GeRR′(N<small><sup>i</sup></small>PrCHN<small><sup>i</sup></small>Pr)}] (<strong>9a</strong>: R = R′ = Ph, <strong>9b</strong>: R = R′ = Et, <strong>10</strong>: R = <small><sup><em>n</em></sup></small>Bu and R′ = H). Addition of carbon dioxide to <strong>10</strong> yielded [(dmpe)<small><sub>2</sub></small>Mn{κ<small><sup>2</sup></small>-Ge<small><sup><em>n</em></sup></small>Bu(κ<small><sup>1</sup></small>-O<small><sub>2</sub></small>CH)(N<small><sup>i</sup></small>PrCHN<small><sup>i</sup></small>Pr)}] (<strong>11</strong>), and reaction of CO<small><sub>2</sub></sma","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"89 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077957","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":"Advanced Approach for Phosphor Recovery and Characterization of LED Components","authors":"Moheddine WEHBIE, Stephanie Delannoy, Fan Sun, Michel Minier, Vincent Semetey","doi":"10.1039/d5dt00705d","DOIUrl":"https://doi.org/10.1039/d5dt00705d","url":null,"abstract":"This study introduces a novel approach for characterizing Light Emitting Diode (LED) devices by isolating their individual components—specifically the phosphor, housing, and LED chips—and analyzing each separately. Furthermore, we selectively recovered the phosphor embedded in the Polydimethylsiloxane (PDMS) through a depolymerization reaction. Our study includes a diverse range of LED types, such as thirty distinct Surface-Mount Device (SMD) LEDs, Chip-on-Board (COB) LEDs, and filament LEDs, sourced from both commercial suppliers and discarded LED lamps. Metals within the phosphor materials and LED bodies were examined using an optical microscope, Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDX), and (Inductively Coupled Plasma – Atomic Emission Spectroscopy) ICP-AES. To access the phosphor, the PDMS layer covering the LED was degraded with a 0.5M Tetrabutylammonium fluoride in tetrahydrofuran (TBAF/THF) solution. Subsequently, the liberated phosphors and metallic bodies underwent leaching with aqua regia for analysis using ICP-AES. The analysis conducted on LED devices revealed the presence of Y, Sr, Eu, Lu, Ce, Al, Ga, Ca in the phosphor materials, and Au, Ag, Ni, Cu, and Fe in the metallic bodies, with Ti located in the housings. This comprehensive approach enabled the precise determination of the gravimetric composition of various LED components, including the phosphor, PDMS, metallic fractions, and housings.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"155 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077958","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":"Facile Time-Controlled Synthesis of Two-Dimensional Zr-Perylenediimide MOF Nanosheets for Ultrasensitive DNA Fluorescent Biosensing","authors":"Shiyang He, Yuhong Chen, Jiayi Wang, Xiaoyang Guo, Xiangrong Pan, Yumeng Su, Xiaoyan Lu, Zhan Zhou, Lufang Ma","doi":"10.1039/d5dt01883h","DOIUrl":"https://doi.org/10.1039/d5dt01883h","url":null,"abstract":"This study demonstrates a facile, surfactant-free strategy for synthesizing uniform two-dimensional (2D) rhombic Zr-PDI (perylenediimide) metal-organic framework (MOF) nanosheets (NSs) (~17 nm thick) by precisely controlling the solvothermal reaction time to 6 h. Leveraging their superior fluorescence quenching capability and selectivity compared to bulk PDI crystals, we developed a Zr-PDI NSs-based fluorescent biosensor. This sensor achieved sensitive target DNA detection (limit of detection: 166 pM) and effectively discriminated single-base mismatched DNA from random DNA sequences. This work establishes a new paradigm for the synthesis of 2D MOFs and paves the way for highly sensitive biosensing platforms.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"9 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145071983","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":"Proton-coupled electron transfer modulates the metal release of blood serum iron transferrin","authors":"Mahesh Sundararajan, Lokpati Mishra, Naman K. Bharti, Swarna P. Mantry","doi":"10.1039/d5dt01803j","DOIUrl":"https://doi.org/10.1039/d5dt01803j","url":null,"abstract":"Serum transferrin (sTf) is a key iron-transport protein in vertebrates, exhibiting an extraordinary affinity for Fe(<small>III</small>). Typically, only ∼30% of sTf is saturated with Fe(<small>III</small>), leaving a significant fraction of its binding sites available for other metal ions, including heavy metals and radionuclides. While iron release under endosomal pH is well-understood to proceed <em>via</em> protonation mechanisms, the release pathways at physiological pH remain less clear and are subject to multiple competing mechanisms. To address this, we employed extensive multi-scale modelling—combining molecular dynamics, metadynamics, and electronic structure calculations—to probe Fe(<small>III</small>) release under physiological conditions. Our investigations focused on three key pathways: direct protonation, one-electron reduction, and proton-coupled electron transfer (PCET). Calculated reduction potentials of approximately 1.3 V for both synthetic and protein models indicate that direct reduction is thermodynamically unfavourable, consistent with experimental observations.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"22 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145071982","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":"Phosphinoamine coinage metal complexes with a coumarin fluorophore: synthesis, characterization, and in vitro (photo)cytotoxicity","authors":"Vanitha R. Naina, Shubham, Franziska Rönicke, Hans-Achim Wagenknecht, Peter W. Roesky","doi":"10.1039/d5dt01532d","DOIUrl":"https://doi.org/10.1039/d5dt01532d","url":null,"abstract":"Herein, we report the synthesis and characterization of coinage metal complexes coordinated to a coumarin-functionalized (bis(4-(<em>tert</em>-butyl)phenyl)) phosphinoamine ligand (<strong>L<small>¹</small></strong>). Treatment of the ligand with CuCl led to the formation of an unexpected tetranuclear compound [<strong>L<small>¹</small></strong>CuCl]<small>₄</small>, while reaction with [Au(tht)<small>₂</small>SbF<small>₆</small>] or [Au(tht)Cl] (tht = tetrahydrothiophene) in an equimolar ratio resulted in [<strong>L<small>¹</small></strong><small>₂</small>Au]SbF<small>₆</small> or [<strong>L<small>¹</small></strong>AuCl]. Reaction of the latter compound with 1-thio-β-<small>D</small>-glucose tetraacetate (Glc) led to [<strong>L<small>¹</small></strong>Au(Glc)]. Owing to the presence of the fluorophore, the resulting metal complexes exhibited strong emissive properties, with the Au<small>^I</small> complexes demonstrating quantum yields exceeding 80%. The emission is mainly contributed by the coumarin moiety. As a result, we further investigated these compounds for their cytotoxicity, photocytotoxicity, and potential in cellular imaging applications. Despite the known general cytotoxicity of Cu<small>^I</small>, the new coinage metal complexes show low cytotoxicity and are useful for cell imaging.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"48 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067925","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":"Multimodal Synergistic Thermometry: Designing Wide-Range Optical Thermometers via Eu 3+ /Er 3+ Co-Doped YVO4","authors":"Ziyuan Li, Qiao Liang, Lu He, Xiaoli Wu","doi":"10.1039/d5dt01830g","DOIUrl":"https://doi.org/10.1039/d5dt01830g","url":null,"abstract":"In this paper, a five-mode synergistic thermometry system based on Eu3+/Er3+ co-doped YVO4 fluorescent material was developed. By utilizing the spectral properties of the phosphor, two luminescence intensity ratio (LIR) and two excitation intensity ratio (EIR) thermometry modes were established, and the fluorescence lifetime thermometry (τ) mode of Eu3+ ⁵D₀→⁷F₂ was also introduced into this system. The Sr values of both Er3+ and Eu3+/Er3+ based LIR modes decrease with increasing temperature, and the Srmax of LIR modes is 0.98% K-1. Similarly, the EIR mode via V–O charge transfer (monitoring Er³⁺ emissions) shows a declining Sr trend, achieving Srmax = 1.01% K⁻¹ at 300 K. Unlike conventional LIR systems, the EIR mode based on Eu3+ (7F0→5D4/7F0→5L6) exhibites a distinct different temperature dependence in its Sr value, with a Srmax is 0.65% K-1 at 500 K. The Srmax of τ mode can reach 0.71% K-1 at 500 K which is superior to other systems. Notably, the EIR and τ modes address the limited high-temperature sensitivity of Boltzmann-type thermometry. In short, the YVO₄: Eu³⁺, Er³⁺ phosphor exhibits excellent thermometric performance and application potential","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"35 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067963","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":"Synthesis of Pd(ii)–NHC complexes via C–H oxidative addition of triazolium salts to Pd(0)","authors":"Anes Kovacevic, Sean Parkin and Jay H. Baltisberger","doi":"10.1039/D5DT01695A","DOIUrl":"10.1039/D5DT01695A","url":null,"abstract":"<p >We report the first example of direct C–H oxidative addition of 1,2,4-triazolium salts to Pd<small>₂</small>(dba)<small>₃</small>, providing a new route to palladium N-heterocyclic carbene (NHC) complexes. Three triazolium ligands, 4-benzyl-1-butyl-1,2,4-triazolium bromide, 4-benzyl-1-methyl-1,2,4-triazolium bromide and 1,4-dibutyl-1,2,4-triazolium bromide were synthesized and reacted with Pd<small>₂</small>(dba)<small>₃</small>. This reaction occurs in air and proceeds efficiently in 1–3 hours to afford air stable, mostly <em>trans</em>, [Pd(NHC)<small>₂</small>Br<small>₂</small>] complexes. The complexes are isolated in good yield and fully characterized. All complexes exhibit NMR evidence of rotamers (<em>anti</em> and <em>syn</em>). The structures of three complexes were confirmed by single-crystal X-ray diffraction.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 37","pages":" 13863-13868"},"PeriodicalIF":3.3,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145068059","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}