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Integration of platinum nanoparticles and Pd-porphyrin photosensitiser into a metal-organic framework for effective photocatalytic hydrogen evolution.
J Colloid Interface Sci
January 2025
Analysis and Testing Center, Xinyang University, Xinyang 464000 China. Electronic address:
A significant enhancement in the photocatalytic activity of metal-organic frameworks (MOFs) is achieved by expanding the visible-light response range through the strategic incorporation of functional groups, such as metalloporphyrins. Herein, Pd-metalised tetrakis(4-carboxyphenyl)porphyrin (PdTCPP) photosensitiser is integrated into the UiO-66-(NH) framework, creating the hybrid material PdTCPP ⊂ UiO-66-(NH) using a facile mixed-ligand strategy. Platinum nanoparticles (Pt NPs) are subsequently introduced as a co-catalyst via in situ photoreduction, resulting in the formation of the Pt/PdTCPP ⊂ UiO-66-(NH) hybrid material, which demonstrates exceptional catalytic performance under visible-light irradiation.
View Article and Find Full Text PDFComparative analysis of the primary structure and production of recombinant poly(ADP-ribose)polymerase 1 of long-lived Heterocephalus glaber.
Vavilovskii Zhurnal Genet Selektsii
November 2024
Institute of Chemical Biology and Fundamental Medicine of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
DNA repair is a most important cellular process that helps maintain the integrity of the genome and is currently considered by researchers as one of the factors determining the maximum lifespan. The central regulator of the DNA repair process is the enzyme poly(ADP-ribose)polymerase 1 (PARP1). PARP1 catalyzes the synthesis of poly(ADP-ribose) polymer (PAR) upon DNA damage using nicotinamide adenine dinucleotide (NAD+) as a substrate.
View Article and Find Full Text PDFRational design of uniform SiO-based afterglow microparticles for photonic crystals.
Mater Horiz
December 2024
Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Shaanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China.
Despite recent advancements in organic phosphors, the synthesis of monodisperse afterglow microparticles (MPs) suitable for creating photonic crystals remains challenging. The SiO matrix is an attractive host material for activating the long-lived emissions of doped molecules due to several factors, including its cross-linked polymer-like structure, abundance of -OH groups, robustness, and presence of numerous emitter defects. However, the Stöber method struggles to produce monodisperse molecule-doped SiO MPs due to the complexity of the system.
View Article and Find Full Text PDFDesign of Chemoresponsive Liquid Crystals Using Metal-Coordinating Polymer Surfaces.
ACS Appl Mater Interfaces
January 2025
Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States.
Liquid crystals (LCs), when interfaced with chemically functionalized surfaces, can amplify a range of chemical and physical transformations into optical outputs. While metal cation-binding sites on surfaces have been shown to provide a basis for the design of chemoresponsive LCs, the cations have been found to dissociate from the surfaces and dissolve slowly into LCs, resulting in time-dependent changes in the properties of LC-solid interfaces (which impacts the reliability of devices incorporating such surfaces). Here, we explore the use of surfaces comprising metal-coordinating polymers to minimize the dissolution of metal cations into LCs and characterize the impact of the interfacial environment created by the coordinating polymer on the ordering and time-dependent properties of LCs.
View Article and Find Full Text PDFPoint defects at grain boundaries can create structural instabilities and persistent deep traps in metal halide perovskites.
Nanoscale
January 2025
Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA.
Article Synopsis
- Metal halide perovskites (MHPs) are popular for their low cost and performance, aided by their unique defect dynamics.
- Research focused on how defects like grain boundaries and lead interstitials create new chemical species that destabilize material properties, preventing recovery to their original structure.
- Long-lasting defects at grain boundaries negatively affect charge mobility and lifetime, emphasizing the need for effective strategies to manage these defects for improved performance.
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