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Modulating the Oxygen Evolution Reaction of Single-Crystal Cobalt Carbonate Hydroxide via Surface Fe Doping and Facet Dependence.
J Phys Chem Lett
January 2025
Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, P. R. China.
The oxygen evolution reaction (OER) is a critical half-reaction in water splitting and metal-air cells. The sensitivity of the OER to the composition and structure of the electrocatalyst presents a significant challenge in elucidating the structure-property relationship. In this study, highly stable single-crystal cobalt carbonate hydroxide [Co(OH)CO, CoCH] was used as a model to investigate the correlations among structure, composition, and reactivity.
View Article and Find Full Text PDFThe Science of Nanostructure Acoustic Vibrations.
Annu Rev Phys Chem
January 2025
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, USA;
Ultrafast excitation of nanoparticles can excite the acoustic vibrational modes of the structure that correlate with the expansion coordinates. These modes are frequently seen in transient absorption experiments on metal nanoparticle samples and occasionally for semiconductors. The aim of this review is to give an overview of the physical chemistry of nanostructure acoustic vibrations.
View Article and Find Full Text PDFImpact of Ligand Structure on Biological Activity and Photophysical Properties of NHC-Protected Au Nanoclusters.
J Am Chem Soc
January 2025
Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.
N-heterocyclic carbene (NHC)-protected gold nanoclusters display high stability and high photoluminescence, making them well-suited for fluorescence imaging and photodynamic therapeutic applications. We report herein the synthesis of two bisNHC-protected Au nanoclusters with π-extended aromatic systems. Depending on the position of the π-extended aromatic system, changes to the structure of the ligand shell in the cluster are observed, with the ability to correlate increases in rigidity with increases in fluorescence quantum yield.
View Article and Find Full Text PDFCross-Coupling Reactions with Nickel, Visible Light, and -Butylamine as a Bifunctional Additive.
ACS Catal
January 2025
Fakultät für Chemie und Pharmazie, Universität Regensburg, Regensburg 93040, Germany.
Transition metal catalysis is crucial for the synthesis of complex molecules, with ligands and bases playing a pivotal role in optimizing cross-coupling reactions. Despite advancements in ligand design and base selection, achieving effective synergy between these components remains challenging. We present here a general approach to nickel-catalyzed photoredox reactions employing -butylamine as a cost-effective bifunctional additive, acting as the base and ligand.
View Article and Find Full Text PDFReactions of Surface Peroxides Contribute to Rates and Selectivities for CH Epoxidation on Silver.
ACS Catal
January 2025
School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Partial oxidation of ethylene over silver catalysts produces more than 30 million metric tons of ethylene oxide (EO) annually. However, the form of active silver surfaces, reactive oxygen species, and dominant pathways of this chemical reaction remains controversial despite decades of research. Here, we use Raman spectroscopy and transient kinetic measurements to demonstrate that higher coverages of peroxide species, present only upon Ag oxide surfaces that form , correlate with greater selectivities to EO.
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