{"title":"Selective Recognition of G-Quadruplex DNAs by Protoporphyrin IX: NMR Insights into 3′-Terminal G-Quartet Binding","authors":"China Okamoto, Yasuhiko Yamamoto, Atsuya Momotake","doi":"10.1002/ejic.202500262","DOIUrl":"https://doi.org/10.1002/ejic.202500262","url":null,"abstract":"<p>Protoporphyrin IX (PPIX), a naturally occurring porphyrin, exhibits selective molecular recognition of G-quadruplex (G4) DNA structures. Herein, the binding behavior toward all-parallel G4 DNAs is investigated using NMR spectroscopy. PPIX is found to selectively bind to the 3′-terminal G-quartets of tetrameric [d(TTAGGG)]<sub>4</sub> (6mer) and monomeric d(TAGGGTGGGTTGGGTGIG) (18mer(G17I)), forming stable 1:1 complexes with binding constants around 1 μM<sup>−1</sup>. In contrast, only minimal spectral changes of PPIX are observed in the presence of [d(TTAGGGT)]<sub>4</sub> (6mer/T), suggesting that the 3′-terminal thymine impedes complex formation. These findings represent the first NMR-based structural characterization of PPIX–G4 DNA complexes and provide new insights into the molecular determinants of porphyrin selectivity for G-quadruplex targets, which may contribute to the development of porphyrin-based G-quadruplex targeting agents.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 26","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135419","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}
Alexander Stüber, Ramona Jurgeleit, Kira Berger, Benjamin Grimm-Lebsanft, Sören Buchenau, Laura Senft, Christian Näther, Ivana Ivanović-Burmazović, Michael Rübhausen, Maria A. Naumova, Felix Tuczek
{"title":"Variable Coordination of Peroxide in a Dinuclear Copper Mono-Oxygenase Model Complex Supported by a Pyridazine-Bridged Ligand","authors":"Alexander Stüber, Ramona Jurgeleit, Kira Berger, Benjamin Grimm-Lebsanft, Sören Buchenau, Laura Senft, Christian Näther, Ivana Ivanović-Burmazović, Michael Rübhausen, Maria A. Naumova, Felix Tuczek","doi":"10.1002/ejic.202500286","DOIUrl":"https://doi.org/10.1002/ejic.202500286","url":null,"abstract":"<p>Copper-oxygen intermediates play an important role in nature as active species of many copper-containing enzymes. However, copper-oxygen intermediates have a key function not only in nature, but also in industry, for example as catalysts. Herein a study on a dinuclear copper complex is presented based on the literature known ligand <b>BPMPD</b>. This ligand combines features of the previously investigated systems (octadentate <i>N</i>-donor, like the <b>MO8</b> system and pyridine donors, like the <b>bdpdz</b> system). Oxygenation of the Cu(I)-complex with O<sub>2</sub> at low temperature leads to the formation of a <i>μ</i>-1,2-peroxo intermediate (<b>Cu</b><sub><b>2</b></sub><b>O</b><sub><b>2</b></sub>), which is characterized with UV/Vis-, rRaman- and X-ray absorption spectroscopy (XAS), as well as by cryo-UHR-electrospray ionization mass spectrometry. The <b>Cu</b><sub><b>2</b></sub><b>O</b><sub><b>2</b></sub> species can be reversibly converted into a <i>μ</i>-1,1-hydroperoxo intermediate (<b>Cu</b><sub><b>2</b></sub><b>OOH</b>) by a reaction with lutidinium triflate and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), which can be monitored by UV/Vis and XAS. Furthermore, the reactivity of the <b>Cu</b><sub><b>2</b></sub><b>O</b><sub><b>2</b></sub> species toward dihydroanthracene is investigated.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 28","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202500286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145272637","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}
Charles Brown, Thom R. Harris-Lee, Quan Yee Tey, Joe C. Goodall, Matthew Surman, Meng Nan Chong, Andrew L. Johnson
{"title":"Precursor Development for Aerosol-Assisted Chemical Vapor Deposition of α-Fe2O3 and BiFeO3 as Effective Photoanodes for Photoelectrochemical Water Splitting","authors":"Charles Brown, Thom R. Harris-Lee, Quan Yee Tey, Joe C. Goodall, Matthew Surman, Meng Nan Chong, Andrew L. Johnson","doi":"10.1002/ejic.202500333","DOIUrl":"10.1002/ejic.202500333","url":null,"abstract":"<p>Photoelectrochemical (PEC) water splitting holds great potential to convert solar energy into hydrogen fuel, establishing an effective method for long-term renewable energy storage. Herein, a simple and effective approach is presented for fabricating thin films of α-Fe<sub>2</sub>O<sub>3</sub> and BiFeO<sub>3</sub> for use as PEC photoanodes via aerosol-assisted chemical vapor deposition (AACVD). A new Fe(III) precursor bearing an amino-tris-<i>tert-</i>butoxide ligand is designed and coupled with a Bi-based precursor bearing the same ligand framework to deposit nanostructured films of α-Fe<sub>2</sub>O<sub>3</sub> and BiFeO<sub>3</sub> with high phase purity. Under 1 sun solar irradiation α-Fe<sub>2</sub>O<sub>3</sub> and BiFeO<sub>3</sub> yielded a photocurrent density of 0.38 and 0.42 mA cm<sup>−1</sup> at 1.23 V<sub>RHE</sub>, respectively. A study reveals that the bespoke precursors exhibit remarkable compatibility with one another, producing films of significantly higher quality compared to those produced with more conventional precursors not optimized for AACVD.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 25","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202500333","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058097","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}
Leonardo Carneiro Lanes, Rodrigo Cervo, Robert Alan Burrow, Bernardo Almeida Iglesias, Natália de Freitas Daudt, Ernesto Schulz Lang, Bárbara Tirloni, Roberta Cargnelutti
{"title":"Photocatalytic Hydrogen Production Enhanced by Copper(I) Pyridinium–Selenolate Complexes Supported on Mesoporous Titania","authors":"Leonardo Carneiro Lanes, Rodrigo Cervo, Robert Alan Burrow, Bernardo Almeida Iglesias, Natália de Freitas Daudt, Ernesto Schulz Lang, Bárbara Tirloni, Roberta Cargnelutti","doi":"10.1002/ejic.202500295","DOIUrl":"10.1002/ejic.202500295","url":null,"abstract":"<p>The reaction of 1,2-bis(3-aminopyridin-2-yl)diselane (apySe)<sub>2</sub> with [CuX(PPh<sub>3</sub>)<sub>3</sub>] (X = Cl, Br, I) yields monomers and the dimers coordination compounds. In both cases, the reduction of the diselane is observed, leading to the formation of 3-aminopyridinium-2-selenolate ligand. The complexes are characterized using spectroscopic and electrochemical methods, as well as single-crystal X-ray diffraction analysis. They are used as co-catalysts of mesoporous titania, for the preparation of photocatalysts. All photocatalysts synthesized are active for the hydrogen production by water photolysis. The m-TiO<sub>2</sub>-<b>1</b> and m-TiO<sub>2</sub>-<b>4</b> photocatalysts stood out, producing 2505 and 2423 μmol g<sup>−1</sup> of hydrogen, respectively, after 6 h of irradiation with a 300 W Hg/Xe lamp. Their activities greatly exceed the amount observed for pure m-TiO<sub>2</sub>, being approximately eight times higher. Through recycling experiments, the stability of the most efficient m-TiO<sub>2</sub>-<b>1</b> photocatalyst is verified, demonstrating the suitable impregnation of the co-catalyst over the m-TiO<sub>2</sub> matrix and the importance of the complex to improve the ability of the photocatalyst to increase the absorption of visible radiation. These results highlight the potential of pyridinium–selenolate copper(I) complexes, to act as effective co-catalysts of m-TiO<sub>2</sub>, for hydrogen production via water photolysis, making them promising candidates for applications in heterogeneous photocatalysis processes.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 25","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202500295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057975","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}
{"title":"Hydroflux Synthesis and Crystal Structures of Na5[RE(OH)6][MO4] (RE = Y, Sc, Er–Lu; M = Cr, Mo, W) and Na8[Sc(OH)6]2[CrO4]","authors":"Yuxi Li, Michael Ruck","doi":"10.1002/ejic.202500317","DOIUrl":"https://doi.org/10.1002/ejic.202500317","url":null,"abstract":"<p>Reacting rare-earth oxides <i>RE</i><sub>2</sub>O<sub>3</sub> (<i>RE</i><b> = </b>Y, Sc, Er<span></span>Lu) with transition metal oxides <i>M</i>O<sub>3</sub> (<i>M</i><b> = </b>Cr, Mo, W) in ultra-alkaline NaOH hydroflux at 250 °C for 10 h results in transparent crystalline products with high yield and purity. Fifteen new compounds with the general formula Na<sub>5</sub>[<i>RE</i>(OH)<sub>6</sub>][<i>M</i>O<sub>4</sub>] are structurally characterized with single-crystal X-ray diffraction. The crystal structures consist of isolated [<i>RE</i>(OH)<sub>6</sub>]<sup>3−</sup> octahedra and [<i>M</i>O<sub>4</sub>]<sup>2−</sup> tetrahedra surrounded by Na<sup>+</sup> cations. While the chromates crystallize in the monoclinic space group <i>C</i>2/<i>c</i>, the molybdates and tungstates adopt the space group <i>I</i>2/<i>a</i>, all with very similar lattice parameters. The two structure types are similar, but not identical. Both structure types can be derived from the same hypothetical structure, which exhibits higher translational symmetry in the k2 supergroup <i>C</i>2/<i>m</i>. Under similar hydroflux condition, the scandium compound Na<sub>8</sub>[Sc(OH)<sub>6</sub>]<sub>2</sub>[CrO<sub>4</sub>] is also obtained, which crystallizes in the noncentrosymmetric tetragonal space group <i>I</i><span></span><math></math>2<i>d</i>. Three thulium compounds are investigated in more detail. Thermal analysis reveals that Na<sub>5</sub>[Tm(OH)<sub>6</sub>][WO<sub>4</sub>] decomposes at about 320 °C to Na<sub>2</sub>WO<sub>4</sub> and Tm<sub>2</sub>O<sub>3</sub>. All thulium compounds are paramagnetic with moments close to the value expected for the free rare-earth cation, but show deviations from Curie–Weiss behavior below 25 K.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 27","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202500317","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196649","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}
V. S. Ajithkumar, Nripen Khilari, Pratiksha B. Ghanwat, Debasis Koley, Sakya S. Sen
{"title":"CC Insertion over NCO of Allyl Isocyanate into the GeSi Bond of a Germylene","authors":"V. S. Ajithkumar, Nripen Khilari, Pratiksha B. Ghanwat, Debasis Koley, Sakya S. Sen","doi":"10.1002/ejic.202500305","DOIUrl":"https://doi.org/10.1002/ejic.202500305","url":null,"abstract":"<p>Two isocyanates are reacted with the germylene, PhC(N<i>t</i>Bu)<sub>2</sub>Ge-Si(SiMe<sub>3</sub>)<sub>3</sub> (<b>1</b>). Phenyl isocyanate undergoes catalytic cyclotrimerization with <b>1</b> leading to 1,3,5-triphenyl isocyanurate (<b>2</b>), while allyl isocyanate undergoes both cyclotrimerization and the CC bond insertion between the Ge<span></span>Si bond. The constitution of <b>3</b> is determined by single-crystal X-ray studies. The contrasting reactivity pattern is explained by comprehensive density functional theory studies.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 26","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135339","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}
Trang T. Vu, Ly T. Le, Hoang V. Le, Duc N. Nguyen, Phong D. Tran
{"title":"Solid State Synthesis of BiVO4 and Its Use as a Photocatalyst for Solar Water Splitting","authors":"Trang T. Vu, Ly T. Le, Hoang V. Le, Duc N. Nguyen, Phong D. Tran","doi":"10.1002/ejic.202500100","DOIUrl":"https://doi.org/10.1002/ejic.202500100","url":null,"abstract":"<p>BiVO<sub>4</sub> is a promising photocatalyst for driving the solar water splitting. In this work, the report on a new strategy to synthesize BiVO<sub>4</sub> by employing the solid-state chemical reaction between BiOI and NH<sub>4</sub>VO<sub>3</sub> precursors. Reaction conditions, for example, reaction time, molar ratio of precursors are varied to investigate its impacts on the morphology and chemical composition of the resultant BiVO<sub>4</sub>. Impacts of the chemical composition on the photocatalytic activity and stability of BiVO<sub>4</sub> are also investigated. It is demonstrated that the stoichiometric BiVO<sub>4</sub> displayed the best stability, meaning the highest resistance again the corrosion while Bi<sub>2</sub>O<sub>3</sub> impurity is detrimental to the operation of BiVO<sub>4</sub> causing an acceleration of corrosion and lowering of photocatalytic activity. In contrast, the critical role of V<sub>2</sub>O<sub>5</sub> impurity is evidenced in protecting BiVO<sub>4</sub> against the corrosion and enhancing its photocatalytic activity.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 29","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297140","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}
Tobias B. Wassermann, Giuliana Hoß, Antti J. Karttunen, Florian Kraus
{"title":"Syntheses and Crystal Structures of the Novel Salts Sr[MoVI2O2F9]2·HF, Ba[MoVI2O2F9]2·2HF, and of Ba[MoVOF5]","authors":"Tobias B. Wassermann, Giuliana Hoß, Antti J. Karttunen, Florian Kraus","doi":"10.1002/ejic.202500316","DOIUrl":"10.1002/ejic.202500316","url":null,"abstract":"<p>The reactions of SrF<sub>2</sub> and BaF<sub>2</sub> with MoOF<sub>4</sub> in aHF at 80 °C are shown to yield the Mo(VI) compounds Sr[Mo<sub>2</sub>O<sub>2</sub>F<sub>9</sub>]<sub>2</sub>·HF and Ba[Mo<sub>2</sub>O<sub>2</sub>F<sub>9</sub>]<sub>2</sub>·2HF. The stoichiometric ratio of metal fluoride and MoOF<sub>4</sub> determines the formation of mono- or dinuclear oxyfluoridomolybdate anions. The Mo(V) compound Ba[MoOF<sub>5</sub>] is synthesized directly for the first time to check its previously reported crystal structure by reacting BaCl<sub>2</sub> with MoCl<sub>5</sub> under hydrofluorothermal conditions. All compounds are characterized by single crystal and powder X-ray diffraction and quantum-chemical calculations on the solids allow the assignment of the infrared and Raman bands.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 25","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202500316","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057919","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}
Bhupinder Kaur, Ankit Pandey, Basvaraj S. Kote, Maravanji S. Balakrishna
{"title":"Ethylenediamine-Derived PNNP Bisphosphine: Synthesis and Transition Metal Chemistry","authors":"Bhupinder Kaur, Ankit Pandey, Basvaraj S. Kote, Maravanji S. Balakrishna","doi":"10.1002/ejic.202500296","DOIUrl":"https://doi.org/10.1002/ejic.202500296","url":null,"abstract":"<p>The synthesis of the ethylenediamine-derived bisphosphine ligand, (<i>o</i>-PPh<sub>2</sub> (C<sub>6</sub>H<sub>4</sub>)C(O)NH(CH<sub>2</sub>))<sub>2</sub> (<b>1</b>) (hereafter referred to as PN<sup>H</sup>N<sup>H</sup>P), is described via two methods distinct from previously reported procedures. Treatment of ligand <b>1</b> with Pd(COD)Cl<sub>2</sub> afforded the <i>trans</i>-dichloropalladium complex [PdCl<sub>2</sub>(PN<sup>H</sup>N<sup>H</sup>P)-κ<sup>2</sup>-<i>P,P</i>] (<b>2</b>). In contrast, the reaction of <b>1</b> with Pd(COD)Cl<sub>2</sub> in the presence of a base led to the formation of the tetradentate <i>cis</i>-complex [Pd(PNNP)-κ<sup>4</sup>-<i>P,N,N,P</i>] (<b>3</b>). Similarly, ligand <b>1</b> reacted with Pt(COD)Cl<sub>2</sub> to yield the corresponding <i>cis</i>-complex [Pt(PNNP)-κ<sup>4</sup>-<i>P,N,N,P</i>] (<b>4</b>). Reaction of <b>1</b> with NiCl<sub>2</sub>(DME) in the presence of a base resulted in the formation of [Ni(PNNP)-κ<sup>4</sup>-<i>P,N,N,P</i>] (<b>5</b>). Notably, exposure of the <i>cis</i>-palladium complex <b>3</b> to HCl gas led to its conversion to the <i>trans</i>-complex <b>2</b>, while the <i>cis</i>-platinum complex <b>4</b> remained unaffected. Density functional theory (DFT) calculations confirm that the conversion of <b>3</b> to <b>2</b> is thermodynamically favorable, with a Gibbs free energy change (ΔG) of −29.7 kcal mol. Furthermore, treatment of ligand <b>1</b> with cuprous halides yield [CuX(PN<sup>H</sup>N<sup>H</sup>P)-κ<sup>2</sup>-<i>P,P</i>] (<b>6</b>: X = Cl; <b>7</b>: X = Br; <b>8</b>: X = I). Reaction with Cu(NCCH<sub>3</sub>)<sub>4</sub>BF<sub>4</sub> produced the dinuclear complex [Cu<sub>2</sub>(PN<sup>H</sup>N<sup>H</sup>P)<sub>2</sub>-κ<sup>4</sup>-<i>P,O,O,P</i>]BF<sub>4</sub> (<b>9</b>).</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 27","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196563","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":"Selective Oxidation of Biomass-Derived 5-Hydroxymethylfurfural into 2,5-Diformylfuran over the Oxygen-Vacancy-Rich Ru/MnO2 Catalyst","authors":"Chuan Qin, Xusheng Guo, Yuxi Si, Yuanchao Huang, Youwei Cheng","doi":"10.1002/ejic.202500181","DOIUrl":"https://doi.org/10.1002/ejic.202500181","url":null,"abstract":"<p>Due to the depletion of traditional fossil resources and the increasing environmental problems, the utilization of sustainable biomass resources has become imperative. The selective oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) has attracted much attention in recent years. However, the large-scale production of DFF remains a challenge given the low dosage of HMF in previous research. In this contribution, a desirable DFF yield of 90.5% is obtained from concentrated HMF (130 °C, 2.0 MPa oxygen, 8 h) over the prepared Ru/MnO<sub>2</sub> catalyst with abundant oxygen vacancies (<i>O</i><sub>V</sub>). The Ru/MnO<sub>2</sub> catalyst with high <i>O</i><sub>V</sub> exhibits a weak Mn<span></span>O bond intensity resulting in high lattice oxygen (<i>O</i><sub>L</sub>) reactivity, which promotes a high catalytic activity of HMF oxidation. Reusability studies show that the Ru/MnO<sub>2</sub> catalyst is stable and reusable. Furthermore, the direct production of DFF from fructose is also successfully realized via two consecutive steps, leading to a cost-efficient oxidation of HMF solution and facilitating the industrial production of DFF. This research provides profound insights into the selective oxidation of HMF to DFF, thereby fostering further investigations into the conversion of fructose into high-value chemicals.</p>","PeriodicalId":38,"journal":{"name":"European Journal of Inorganic Chemistry","volume":"28 27","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196577","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}