Although hydrogen peroxide (HO) has been highly used in nuclear chemistry for more than 75 years, the preparation and literature description of tetravalent actinide peroxides remain surprisingly scarce. A new insight is given in this topic through the synthesis and thorough structural characterization of a new peroxo compound of Pu(IV).
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1039/d4cc01186d | DOI Listing |
J Phys Chem Lett
November 2024
Purdue University, Physics and Astronomy Department, West Lafayette, Indiana 47907, United States.
Metal-dioxygen species are important intermediates formed during dioxygen activations by metalloenzymes in various biological processes, by catalysts in fuel cells, and prior to O evolution by photosystem II. In this work, we focus on manganese-porphyrin complexes using tetramesitylporphyrin ligand (TMP) to explore changes in Mn K-edge X-ray absorption spectroscopy (XAS) associated with the formation of Mn-hydroxide and Mn-O peroxide species. With limited spectroscopic characterization of these compounds, Mn K X-ray emission spectroscopy (XES), XAS, density functional theory (DFT), and time-dependent DFT (TD-DFT) analysis will enhance our understanding of their complex electronic structure.
View Article and Find Full Text PDFBull Jpn Soc Coord Chem
June 2024
Department of Chemistry, Johns Hopkins University.
Angew Chem Int Ed Engl
October 2024
Universität Göttingen, Institut für Anorganische Chemie, Tammannstrasse 4, D-37077, Göttingen, Germany.
Hydrogen bonds involving the oxygen atoms of intermediates that result from copper-mediated O activation play a key role for controlling the reactivity of Cu/O active sites in metalloenzymes and synthetic model complexes. However, structural insight into H-bonding in such transient species as well as thermodynamic information about proton transfer to or from the O-derived ligands is scarce. Here we present a detailed study of the reversible interconversion of a μ-peroxodicopper(II) complex ([1]) and its μ-hydroperoxo congener ([2]) via (de)protonation, including the isolation and structural characterization of several H-bond donor (HBD) adducts of [1] and the determination of binding constants.
View Article and Find Full Text PDFMolecules
August 2024
College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China.
In recent years, TiO-based catalysts have received extensive attention from researchers for their excellent oxidative desulfurization (ODS) performances. In this paper, a series of mesoporous TiO/SiO catalysts with different TiO loadings are prepared, using an incipient wetness impregnation method with agricultural waste rice husk as both the silicon source and mesoporous template and tetrabutyl titanate as the titanium source. The effect of different TiO loadings on the ODS performance of the samples is investigated, and the appropriate TiO loading is 2.
View Article and Find Full Text PDFJ Am Chem Soc
August 2024
Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States.
The chemistry of copper-dioxygen complexes is relevant to copper enzymes in biology as well as in (ligand)Cu-O (or Cu-O) species utilized in oxidative transformations. For overall energy considerations, as applicable in chemical synthesis, it is beneficial to have an appropriate atom economy; both O-atoms of O are transferred to the product(s). However, examples of such dioxygenase-type chemistry are extremely rare or not well documented.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!