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A novel green and eco-friendly approach has been used to biosynthesize Ag-Fe bimetallic nanoparticles (Ag-FeBNPs) by using the water extract of the red alga species; Galaxaura rugosa. The surface plasmon resonance band of Ag-FeBNPs is positioned at 327 nm. X-ray diffraction analysis (XRD) illustrated the crystalline nature of biogenic nanoparticles with average diameters of 32.6 nm. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) showed that the particles have a crystalline spherical shape with a size range from 19.95 to 37.11 nm. Scanning electron microscopy (SEM) and Energy dispersive analysis (EDAX) give the surface morphology and elemental composition of Ag-FeBNPs, which are spherical in high intensity. Fourier transmittance infrared spectroscopy (FTIR) showed various stretching vibrations at 3421, 1598, 1384, 1035, and 865 cm. These findings suggest that biomolecules play a crucial role in forming and stabilizing Ag-FeBNPs. Zeta potential values show - 16.1 mV. This study demonstrates the promising future of Ag-FeBNPs for nanobiotechnology and nanoscience, offering an environmentally friendly and simple approach for nanoparticles biosynthesizing. In addition, the synthesized Ag-FeBNPs exhibit properties that make them suitable for potential applications in biomedical fields, environmental remediation, and catalysis.
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http://dx.doi.org/10.1038/s41598-025-16009-1 | DOI Listing |
J Am Chem Soc
September 2025
State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.
The discovery of new weak supramolecular interactions and supramolecular synthons is essential for directing self-assembly processes with enhanced precision, diversity, and functionality in complex molecular architectures. Here, we report the controlled self-assembly of diverse supramolecular architectures by a new directional bonding approach through the integration of radical-based dynamic covalent chemistry and supramolecular synthons. A novel macrocyclic synthon, , with a linear direction is constructed via radical-based dynamic covalent bonds from the phenothiazine building block substituted with two dicyanomethyl radicals.
View Article and Find Full Text PDFInt J Phytoremediation
September 2025
Innovative Food Technologies Development Application and Research Center, Gölköy Campus Bolu, Bioenvironment and Green Synthesis Research Group, Bolu Abant İzzet Baysal University, Bolu, Türkiye.
This study presents an eco-friendly approach for the green synthesis of manganese oxide nanoparticles (MnONPs) using () (einkorn wheat) seed extract as a reducing and stabilizing agent. The synthesized MnONPs were characterized by UV-Vis, XRD, FTIR, SEM-EDX, BET, and zeta potential analyses, which confirmed their crystalline nature, spherical morphology, and mesoporous structure with a surface area of 41.50 m/g.
View Article and Find Full Text PDFJ Org Chem
September 2025
National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P. R. China.
We herein describe a novel decarboxylation/cyclization sequence involving a three-component reaction of dialkyl 2-(alkoxymethylene)malonate, amines, and terminal alkyne ester or internal alkyne ester catalyzed by CsCO under microwave conditions. These two types of highly chemo- and regioselective transformations were accomplished by different reaction channels to furnish a wide range of functionalized 8-hydroxyisoquinoline-1(2)-ones (21 examples) and 2-pyridones (18 examples) in good to excellent yields and might provide new opportunities for the discovery of N-heterocyclic drugs and other functional molecules.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
Department of Chemistry, Korea University, Seoul, 02841, South Korea.
Chemodynamic therapy (CDT), leveraging Fenton reactions to generate hydroxyl radicals (•OH) from intracellular hydrogen peroxide (HO), offers a promising cancer treatment strategy due to its high specificity and low systemic toxicity. However, the targeted delivery of •OH-producing prodrugs using covalent organic frameworks (COFs) remains a significant challenge. Here, we report a mitochondria-targeted COF-based nano prodrug, COF-31@P, designed for enhanced CDT efficacy.
View Article and Find Full Text PDFAdv Mater
September 2025
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Bionanomaterials & Translational Engineering Laboratory, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical
Sonocatalytic therapy (SCT) is a non-invasive tumor treatment modality that utilizes ultrasound (US)- activated sonocatalysts to generate reactive oxygen species (ROS), whose production critically dependent on the electronic structural properties of the catalytic sites. However, the spin state, which is a pivotal descriptor of electronic properties, remains underappreciated in SCT. Herein, a Ti-doped zirconium-based MOF (Ti-UiO-66, denoted as UTN) with ligand-deficient defects is constructed for SCT, revealing the important role of the electronic spin state in modulating intrinsic catalytic activity.
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