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Electronic state modulation of Ag nanoclusters within a ring-shaped polyoxometalate.
Nanoscale
October 2024
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Atomically precise Ag nanoclusters display distinctive properties that are dictated by their structures and electronic states. However, manipulating the electronic states of Ag nanoclusters is challenging owing to their inherent instability and susceptibility to undesired structural changes, decomposition, and aggregation. Recently, we reported the synthesis of a body-centered cubic {Ag} nanocluster encapsulated within a ring-shaped polyoxometalate (POM) [PWO] by reacting 16 Ag-containing [PWO] with Ag using ,-dimethylformamide (DMF) as a mild reducing agent.
View Article and Find Full Text PDFAqueous Electrochemical and pH Studies of Redox-Active Guanidino Functionalized Aromatics for CO Capture.
ACS Org Inorg Au
August 2024
Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, United States.
Escalating levels of carbon dioxide (CO) in the atmosphere have motivated interest in CO capture and concentration from dilute streams. A guanidino-functionalized aromatic 1,4-bis(tetramethylguanidino)benzene (1,4-btmgb) was evaluated both as a redox-active sorbent and as a pH swing mediator for electrochemical CO capture and concentration. Spectroscopic and crystallographic studies demonstrate that 1,4-btmgb reacts with CO in water to form 1,4-btmgbH(HCO ).
View Article and Find Full Text PDFDimerization of 9-Phenyl-ferroceno[2,3]indenylmethyl Radicals: Electrochemical and Spectroelectrochemical Studies.
ACS Org Inorg Au
August 2024
Department of Chemistry, Universität Konstanz, Konstanz 78457, Germany.
We report on three new 9-phenyl-substituted ferroceno[2,3]indenylmethylium dyes - with electron-donating (OMe, Me) or electron-withdrawing (CF) substituents. Complexes - exist as racemic mixtures of and enantiomers. Pyramidalization at the methyl C atom in the precursor carbinol species - or the corresponding one-electron reduced radicals induces a second stereocenter, as the 9-phenyl substituent may reside in an or an position.
View Article and Find Full Text PDFLigand redox controlled amine dehydrogenation and imine hemilability in singlet diradical azo-aromatic Ni(II) complexes: characterization of the electron transfer series of azo-imine complexes of Ni(II).
Dalton Trans
June 2024
Department of Chemistry, Indian Institute of Technology Jammu, Jagti, Jammu, Jammu and Kashmir 181221, India.
Herein, using azo-amine (H2L) and azo-imine (L) ligands, singlet diradical Ni(II) complexes [1] and [2] were synthesized from Ni(0)(COD) in THF. In separate reactions, homoleptic Ni complexes, [3a]2+-[3c]2+, were synthesized from [Ni(HO)](ClO) and L, respectively. All these complexes were characterized thoroughly.
View Article and Find Full Text PDFPathological Impact of Redox Post-Translational Modifications.
Antioxid Redox Signal
July 2024
Faculté de Médecine, INP, Institut de neurophysiopathologie, Aix Marseille Université, CNRS, Marseille, France.
Oxidative stress is involved in the development of several pathologies. The different reactive oxygen species (ROS) produced during oxidative stress are at the origin of redox post-translational modifications (PTMs) on proteins and impact nucleic acids and lipids. This review provides an overview of recent data on cysteine and methionine oxidation and protein carbonylation following oxidative stress in a pathological context.
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