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Stepwise reduction of an asymmetric π-expanded pyracylene towards the crystalline radical trianion.
Chem Sci
January 2025
Department of Chemistry, University at Albany, State University of New York Albany New York 12222 USA
The chemical reduction of a pyracylene-hexa--hexabenzocoronene-(HBC)-fused nanographene TPP was investigated with K and Rb metals to reveal its multi-electron acceptor abilities. The reaction of TPP with the above alkali metals, monitored by UV-vis-NIR and H NMR spectroscopy, evidenced the stepwise reduction process. The use of different solvents and secondary ligands enabled isolation of single crystals of three different reduced states of TPP with 1, 2, and 3 electrons added to its π-system.
View Article and Find Full Text PDFSelf-sensitized Cu(ii)-complex catalyzed solar driven CO reduction.
Chem Sci
January 2025
Department of Chemical Sciences, Indian Institute of Science Education and Research Mohanpur 741246 Kolkata India
Developing a self-sensitized catalyst from earth-abundant elements, capable of efficient light harvesting and electron transfer, is crucial for enhancing the efficacy of CO transformation, a critical step in environmental cleanup and advancing clean energy prospects. Traditional approaches relying on external photosensitizers, comprising 4d/5d metal complexes, involve intermolecular electron transfer, and attachment of photosensitizing arms to the catalyst necessitates intramolecular electron transfer, underscoring the need for a more integrated solution. We report a new Cu(ii) complex, K[CuNDPA] (1[K(18-crown-6)]), bearing a dipyrrin amide-based trianionic tetradentate ligand, NDPA (HL), which is capable of harnessing light energy, despite having a paramagnetic Cu(ii) centre, without any external photosensitizer and photocatalytically reducing CO to CO in acetonitrile : water (19 : 1 v/v) with a TON as high as 1132, a TOF of 566 h and a selectivity of 99%.
View Article and Find Full Text PDFConstruction of environmentally stable self-adhesive conductive cellulose hydrogel for electronic skin sensor via autocatalytic fast polymerization strategy at room temperature.
Int J Biol Macromol
January 2025
Engineering Research Center of Forestry Biomass Materials and Bioenergy (Ministry of Education), National Forest and Grass Administration Woody Spices (East China) Engineering Technology Research Center, Beijing Forestry University, Beijing 100083, China. Electronic address:
Bio-based conductive hydrogels are catching a widespread attention in the field of flexible sensors and human-machine interface interaction. Here, an enhanced autocatalytic system constructed from dopamine-encapsulated cellulose nanofibers (DA@CNF) and Cu in a glycerol-water binary solvent achieved fast auto-polymerization of hydrogels within 60 s. X-ray photoelectron spectra (XPS), UV-vis spectrum (UV), Cyclic Voltammetry (CV) and electron paramagnetic resonance (EPR) were used to characterize the autocatalytic system.
View Article and Find Full Text PDFUnveiling the multifaceted bioactivity of copper(II)-Schiff base complexes: a comprehensive study of antioxidant, anti-bacterial, anti-inflammatory, enzyme inhibition and cytotoxic potentials with DFT insights.
Dalton Trans
January 2025
Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 22, Kerala, India.
The rise of various diseases demands the development of new agents with antioxidant, antimicrobial, anti-inflammatory, enzyme-inhibiting, and cytotoxic properties. In this study, heterocyclic Schiff base complexes of Cu(II) featuring a benzo[]thiophene moiety were synthesized and their biological activities evaluated. The complexes were characterized using FT-IR, UV-Vis, and EPR spectroscopy, TG-DTG analysis, magnetic moment measurements, molar conductivity measurements, and elemental analyses.
View Article and Find Full Text PDFDisruption of a potential disulfide bond of Cys65-Cys141 on the structure and stability of globin X from zebrafish.
Phys Chem Chem Phys
January 2025
School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.
Globin X is a newly discovered member of the globin family, while its structure and function are not fully understood. In this study, we performed protein modelling studies using Alphafold3 and molecular dynamics simulations, which suggested that the protein adopts a typical globin fold, with the formation of a potential disulfide bond of Cys65 and Cys141. To elucidate the role of this unique disulfide in protein structure and stability, we constructed a double mutant of C65S/C141S by mutating the two cysteine residues to serine.
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