Results 231 to 240 of about 101,916 (337)

The Low Oxidation State Paradigm is More Consistent with XFEL Observations of the S₃ → [S₄] → S₀ Transition in Photosystem II

Chemistry – A European Journal, EarlyView.
Density functional theory (DFT) calculations within the LOS paradigm reproduce key XFEL observations of the S₃ → [S₄] → S₀ transition in PSII. In contrast to the HOS model, the LOS framework explains both the disappearance of Ox during O–O bond formation and the unchanged Mn4–O5 distance in the peroxide intermediate.
Alireza Ariafard, Matthew Longhurst, Gerhard F. Swiegers, Robert Stranger   +3 more
wiley   +1 more source

Apparent Kinetic Isotope Effects for Multi-Step Steady-State Reactions. [PDF]

J Phys Chem B
Williams IH.
europepmc   +1 more source

Fluorescent Deferoxamine Complexes of Cu(II) and Zr(IV): Insights in the Development of Dual Imaging Probes

Chemistry – A European Journal, EarlyView.
The insertion of a fluorescent coumarin unit by using a lysine‐based linker on deferoxamine leads to a chelating agent (DFOKC), whose Cu(II) and Zr(IV) complexes can be used for both optical imaging and positron emission tomography. DFOKC shows increased binding ability for Cu(II) and Zr(II) and improved tumor cell internalization via pinocytosis ...
Yschtar Tecla Simonini Steiner, Virginia Zizi, Monica Mangoni, Patrizia Nardini, Daniele Bani, Andrea Bencini, Antonio Bianchi, Matteo Savastano, Giammarco Maria Romano   +8 more
wiley   +1 more source

Oxidative Dehydrogenation of N‐Heteroaromatic Alkyl Alcohols and Amines Facilitated by Dearomative Tautomerization

Chemistry – A European Journal, EarlyView.
N‐heteroaromatic alkyl alcohols and amines are inherently unstable in acidic and/or basic solution due to an irreversible dehydrogenation that proceeds from a minority tautomer. In many cases, this reaction results in quantitative oxidation to the corresponding aldehyde, providing a simple, convenient, and green approach for preparing versatile ...
Omid Ghasemloo, Carson L. Hasselbrink, Douglas D. Cardona, Brenton DeBoef, Dugan Hayes   +4 more
wiley   +1 more source

The Genuine Carbene Conundrum

Chemistry – A European Journal, Accepted Article.
Carbenes, these neutral divalent carbon species have emerged as pivotal players in our laboratories. Despite their broad impact, direct characterization of these reactive molecules remains challenging in many cases. This concept article draws on recent literature to explore the strengths and limitations of the most widely used strategies for their ...
Rodolphe Jazzar, Bethany Sawyer, Jesse. L. Peltier   +2 more
wiley   +1 more source

Intramolecular PCET of α‐Keto Acids: Synthesis of Trifluoromethyl Ketones via Ketyl Radicals

Chemistry – A European Journal, EarlyView.
Decarboxylation of α‐keto acids have conventionally served as simple building blocks for the generation of nucleophilic acyl radicals. Herein, we demonstrate a distinct approach for this substrate class, showcasing the generation of ketyl radicals through a proton‐coupled electron transfer (PCET) mechanism.
Rifat N. Nabi, Kimberly A. Jarquin, Anupam Karmakar, Kyle E. Brunner, Daniel K. Kim   +4 more
wiley   +1 more source

Oxygen Isotope Fractionation of O₂ Consumption through Abiotic Photochemical Singlet Oxygen Formation Pathways. [PDF]

ACS Environ Au
Pati SG, Brunner LM, Ley M, Hofstetter TB.   +3 more
europepmc   +1 more source

Sustainable Water Decontamination: Advanced High‐Valent Iron Active Species‐Driven Peroxymonosulfate Activation for Global Challenges

CleanMat, EarlyView.
Iron‐based catalysts activate peroxymonosulfate (PMS) to generate high‐valent iron‐oxo species for water decontamination and clean water production. The activation efficiency of PMS varies significantly depending on iron catalyst properties, while the generation of reactive high‐valent iron intermediates is governed by catalyst characteristics ...
Junpeng Guo, Miao Lei, Ling Yan, Junhang Huang, Chang Liu, Li Ye, BoLin Li, Xingtao Xu, Ye Li   +8 more
wiley   +1 more source

Isotopic source signatures of stratospheric CO inferred from in situ vertical profiles. [PDF]

NPJ Clim Atmos Sci
Hooghiem JJD, Gromov S, Kivi R, Popa ME, Röckmann T, Chen H.   +5 more
europepmc   +1 more source

Linear and Two‐Dimensional Infrared Spectroscopy of the Multifunctional Vibrational Probe, 3‐(4‐Azidophenyl) Propiolonitrile. Deperturbing a Fermi Triad by Isotopic Substitution

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Linear infrared spectroscopy combined with isotope labeling and density functional theory unravels the origin of a Fermi triad in a multifunctional vibrational chromophore. Ultrafast 2DIR‐spectroscopy reports directly on the dynamics and the intramolecular vibrational energy flow pathways in the isotopically deperturbed system. Abstract Infrared probes
Claudia Gräve, Jörg Lindner, Stefan Flesch, Luis I. Domenianni, Peter Vöhringer   +4 more
wiley   +1 more source