A trimesic-acid-linked multimetal metal–organic framework achieved 60 mA cm−2 and stable cycling for more than 13 days in rechargeable zinc–air battery tests.

Read the full paper: Cooperative Multimetal Chemistry Enables Precision Synthesis of High-Entropy Oxide Nanocrystal Catalysts

The ruthenium nitrosyl moiety, {RuNO}6, is important as a potential releasing agent of nitric oxide and is of inherent interest in coordination chemistry. Typically, {RuNO}6 is found in mononuclear complexes. Herein we describe the synthesis and characterization of several multimetal cluster complexes that contain this unit. Specifically, the heterotrinuclear μ3-oxido clusters [Fe2RuCl4(μ3-O)(μ-OMe)(μ-pz)2(NO)(Hpz)2] (6) and [Fe2RuCl3(μ3-O)(μ-OMe)(μ-pz)3(MeOH)(NO)(Hpz)][Fe2RuCl3(μ3-O)(μ-OMe)(μ-pz)3(DMF)(NO)(Hpz)] (7·MeOH·2H2O) and the heterotetranuclear μ4-oxido complex [Ga3RuCl3(μ4-O)(μ-OMe)3(μ-pz)4(NO)] (8) were prepared from trans-[Ru(OH)(NO)(Hpz)4]Cl2 (5), which itself was prepared via acidic hydrolysis of the linear heterotrinuclear complex {[Ru(μ-OH)(μ-pz)2(pz)(NO)(Hpz)]2Mg} (4). Complex 4 was synthesized from the mononuclear Ru complexes (H2pz)[trans-RuCl4(Hpz)2] (1), trans-[RuCl2(Hpz)4]Cl (2), and trans-[RuCl2(Hpz)4] (3). The new compounds 4–8 were all characterized by elemental analysis, ESI mass spectrometry, IR, UV–vis, and 1H NMR spectroscopy, and single-crystal X-ray diffraction, with complexes 6 and 7 being characterized also by temperature-dependent magnetic susceptibility measurements and Mössbauer spectroscopy. Magnetometry indicated a strong antiferromagnetic interaction between paramagnetic centers in 6 and 7. The ability of 4 and 6–8 to form linkage isomers and release NO upon irradiation in the solid state was investigated by IR spectroscopy. A theoretical investigation of the electronic structure of 6 by DFT and ab initio CASSCF/NEVPT2 calculations indicated a redox-noninnocent behavior of the NO ancillary ligand in 6, which was also manifested in TD-DFT calculations of its electronic absorption spectrum. The electronic structure of 6 was also studied by an X-ray charge density analysis.

Figure 1a illustrates the chemical structures of the various dopants used in the spiro-OMeTAD solution, along with the size of the central metal ions, highlighting the distinctions between synergistic mixed doping and conventional doping (For details regarding the rationale behind...

Investing.com -- Aurubis AG (ETR:NAFG) on Thursday reported net cash flow surged nearly 30% to €677 million from €537 million in fiscal 2024-25, the highest level in three years, as the German multimetal producer proposed raising its dividend to €1.60 per share from €1.50. The Hamburg-based company, one of the largest copper recyclers worldwide, posted operating earnings before taxes of €355 million for the year ending September 30, down from €413 million the previous year but within its forecast range of €330 million to €370 million. Operating EBITDA declined modestly to €589 million from €622 million. The Supervisory Board and Executive Board will propose the dividend increase at the Annual General Meeting on February 12, 2026, lifting the payout ratio to around 27% from 20% of operating consolidated net income. "Even in economically turbulent times, we deliver stable performance, consistently execute our ambitious investment agenda, and offer higher dividends," CEO Dr. Toralf Haag said a statement. Return on capital employed fell to 8.8% from 11.5%, impacted by investments in growth projects. IFRS consolidated earnings before taxes reached €727 million, exceeding the previous year’s €523 million due to higher metal prices. The company benefited from a considerably higher metal result year-over-year, a significant jump in sulfuric acid revenues, and robust demand for copper products. These gains were partially offset by lower concentrate throughput at reduced treatment and refining charges, a slight decline in recycling revenues, and higher ramp-up costs and depreciation from strategic projects. Aurubis had deployed over 75% of its €1.7 billion investment program by September 2025. The strategic projects are expected to contribute approximately €260 million to annual EBITDA starting in fiscal 2028/29. The company began production at phase one of its Aurubis Richmond project in the United States, described as the first secondary smelter for complex multimetal recycling material in North America. Once phase two is completed, the facility will process around 180,000 tons of complex recycling materials annually. The U.S. market requires around 2 million tons of copper yearly and relies on imports to cover roughly half that need. Aurubis allocated around €1 billion of strategic investment to Europe, developing recycling plants in Beerse and Olen, planning a complex recycling plant in Hamburg, and expanding its tankhouse in Bulgaria. For fiscal 2025-26, the producer of more than 1 million tons of copper cathodes annually forecast operating earnings before taxes between €300 million and €400 million, with operating return on capital employed between 7% and 9%. The company is targeting balanced free cash flow before dividends for the current fiscal year. The fastest way to find out is with our Fair Value calculator. We use a mix of 17 proven industry valuation models for maximum accuracy. Get the bottom line for NAFG plus thousands of other stocks and find your next hidden gem with massive upside.

Major mining cities worldwide have been suffering from diverse contamination sources such as tailings, mine drainages, geology enriched with toxic met…

Complex metal chalcogenide nanostructures, particularly multimetal, multichalcogen systems, represent a largely unexplored frontier of structural and compositional diversity. Indeed, systematic explor...

A triple metal prodrug that codelivers PtII, RuII, and AuI species triggers a potent immunogenic cell death (ICD) response via combined Type I/II pathways. The tri-metallic scaffold promotes tumor in...