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Development of a Zeolitic Imidazolate Framework Based Superhydrophobic Surface with Abrasion Resistance, Corrosion Protection, and Anti-icing.
Langmuir
March 2025
Jiangxi Province Key Laboratory of Light Alloy, School of Advanced Manufacturing, Nanchang University, Nanchang 330031, P.R. China.
Herein, a superhydrophobic surface was designed and fabricated based on the "lotus effect" construction mechanism. The zeolitic imidazolate framework (ZIF-90) micro-nanoparticles were initially synthesized via a one-pot method, combined with long-chain stearic acid (STA), and subsequently embedded in polyvinyl butyral (PVB) to form a superhydrophobic surface at room temperature. The superhydrophobic surface demonstrated mechanical stability and retained its superhydrophobicity with a water contact angle (CA) greater than 150°, even at a wear distance of 400 cm.
View Article and Find Full Text PDFUltralong Room Temperature Phosphorescence through Both Space Confinement and Long-Range Charge Migration.
ACS Appl Mater Interfaces
March 2025
School of Chemistry and Environment, Changchun University of Science and Technology, Changchun 130022, China.
Doping guest materials into host materials with a confined space to suppress nonradiative decay is an effective strategy for achieving room-temperature phosphorescence (RTP). However, constructing host-guest doped materials with ultralong RTP (URTP) is still challenging. Herein, by embedding three coumarin derivatives into boric acid via one-step heat treatment, the URTP material with an afterglow lasting up to 60 s, a phosphorescence lifetime of 1.
View Article and Find Full Text PDFRevealed Preferential Short-Range Anion Ordering in Disordered RbMOF (M = Nb, Ta) Pyrochlore-Type Oxyfluorides.
Inorg Chem
March 2025
Institut des Molécules et Matériaux du Mans (IMMM)─UMR 6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France.
Describing the crystal structure of disordered materials with mixed-occupancy crystallographic sites is essential for understanding their physicochemical properties and designing new materials tuned to their targeted functionalities. Here, we investigate the structure of RbMOF (M = Nb, Ta) pyrochlore-type oxyfluorides using a multimodal approach that combines experimental and computational techniques. Rietveld structural refinement of powder X-ray powder diffraction (PXRD) data confirmed that these oxyfluorides are isostructural, and their average crystal structure is disordered.
View Article and Find Full Text PDFMechanistic Insights into Regioselectivity and Its Evolution in On-Surface Polymerization.
J Am Chem Soc
March 2025
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Surface-catalyzed polymerization is crucial in both chemical science and industrial manufacturing, yet achieving regioselective radical polymerization on the surface remains challenging. Here, we demonstrate the regioselective Ullmann polymerization of nonsymmetrical 2,8-dibromoquinoline (DBQ) on an Au(111) surface. By combining scanning tunneling microscopy, density functional theory calculations, and kinetic modeling, we reveal the regioselectivity and its evolution with surface temperature at the molecular level.
View Article and Find Full Text PDFEnvironmentally Persistent Free Radical Emissions from Indoor Burning of Pelletized Biofuels.
Environ Sci Technol
March 2025
Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
Pelletization of biomass fuels has been promoted as an effective alternative to mitigate particulate matter (PM) emissions from the residential burning of raw biomass materials; however, environmentally persistent free radicals (EPFRs), a class of harmful components in PM, from the biomass pellet burning have been rarely studied yet. Here, laboratory-based combustion experiments were conducted to characterize EPFRs for different pellets burned in cooking and heating stoves and compared with those for the corresponding uncompressed biofuels. Emission factors (EFs) of EPFRs for biomass pellets ranged from 2.
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