A multi-level regulation of fluorescence enhancement upon anion coordination and subsequent binding of a guest (methyl viologen) was presented by a bis-bis(urea)-decorated tetraphenylethene (TPE) ligand with an assembly-enhanced emission characteristic.
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http://dx.doi.org/10.1039/d0dt03788e | DOI Listing |
Mater Today Bio
February 2025
Research Center of Nanomedicine Technology, The Second Affiliated Hospital of Guangxi Medical University, Nanning, 530000, PR China.
Nanozymes with specific catalytic activity inhibit inflammation and promote wound healing efficiently and safely. In this work, multifunctional manganese-based nanozymes (MnGA) with antioxidant properties were successfully constructed via a simple coordination reaction in which manganese chloride was used as the manganese source and gallic acid (GA) was used as the ligand solution. MnGA possesses both catalase-like (CAT-like) and superoxide dismutase-like (SOD-like) activities and a reactive nitrogen species (RNS) scavenging capacity, which enables it to efficiently inhibit the inflammatory response.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
Department of Chemistry, Rutgers University, Camden, NJ, United States of America; Center for Computational and Integrative Biology, Rutgers University, Camden, NJ, United States of America. Electronic address:
Ion transport in solid polymer electrolytes is crucial for applications like energy conversion and storage, as well as carbon dioxide capture. However, most of the materials studied in this area are petroleum-based. Natural materials (biopolymers) have the potential to act as alternatives to petroleum-based products and, when derived with ionic liquid (IL) functionalities, present a sustainable alternative for conductive materials by offering tunable morphological, thermal, and mechanical properties.
View Article and Find Full Text PDFChemistry
January 2025
University of Eastern Finland, Department of Chermistry, Yliopistokatu 7, 80100, Joensuu, FINLAND.
The structure and reactivity of small methylaluminoxane (MAO) species (MeAlO)n(Me3Al)m (n = 1-8) have been investigated using DFT (M06-2X), MP2, and CCSD(T) calculations. This hierarchy of methods reveals that DFT artificially stabilizes structures containing 4-coordinate oxygen atoms while higher-level calculations demonstrate a clear preference for structures with 3-coordinate oxygen and 4-coordinate aluminum centers. Analysis of ionization pathways shows these neutral MAO molecules form anions through either methide or Me2Al+ abstraction, with the latter mechanism dominant for sheet structures (n = 5-8).
View Article and Find Full Text PDFAcc Chem Res
January 2025
Department of Chemistry and Research Center for Chemical Biology and Omics Analysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
ConspectusThe advancement of synthetic methodologies is fundamentally driven by a deeper understanding of the structure-reactivity relationships of reactive key intermediates. Carbyne anions are compounds featuring a monovalent anionic carbon possessing four nonbonding valence electrons, which were historically confined to theoretical constructs or observed solely within the environment of gas-phase studies. These species possess potential for applications across diverse domains of synthetic chemistry and ancillary fields.
View Article and Find Full Text PDFJ Phys Chem C Nanomater Interfaces
January 2025
Center for Quantum Nanoscience, Institute for Basic Science, Seoul 03760, South Korea.
Precise description of the interaction between molecular oxygen and metal surfaces is one of the most challenging topics in quantum chemistry. In this work, we use low-temperature scanning tunneling microscopy (STM) to identify and characterize an adsorption state of molecular oxygen that coordinates to three Ag atoms (μ) on Ag(100). Surprisingly, μ-O cannot be identified as a stable configuration with generalized gradient approximation (GGA)-level density functional theory (DFT) calculations.
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