Results 151 to 160 of about 70,737 (245)

Tailoring High‐Valent Iron‐Oxo Species Redox via Extended π‐Fe3d–O2p Orbital Overlapping Toward Chemical‐Efficient Water Purification

Angewandte Chemie, EarlyView.
We address the long‐standing challenge of reactivity–selectivity trade‐off by precisely tuning the redox properties of Fe(IV), rather than simply accelerating its formation, to enable chemically efficient and low‐emission water treatment. ABSTRACT High‐valent iron oxo species (Fe(IV)) are attractive for wastewater treatment because of their high ...
Hongyu Zhou, Junwen Chen, Jiuyi Wang, Xinhao Wang, Qiming Zhang, Shiying Ren, Xuning Li, Li Gao, Shaobin Wang, Xiaoguang Duan   +9 more
wiley   +2 more sources

Shining a new light on the classical concepts of carbon-isotope dendrochronology. [PDF]

New Phytol
Wieloch T.
europepmc   +1 more source

A Bacterial Form I' Rubisco Has a Smaller Carbon Isotope Fractionation than Its Form I Counterpart. [PDF]

Biomolecules, 2023
Wang RZ, Liu AK, Banda DM, Fischer WW, Shih PM.   +4 more
europepmc   +1 more source

CSAKD: Determining Absolute Ligand Affinities From 19F NMR Chemical Shift Anisotropy

Angewandte Chemie, EarlyView.
Affinity determination is crucial in drug discovery, yet remains difficult for weakly binding fragments. We introduce chemical shift anisotropy KD$K_{\text{D}}$ (CSAKD) by 19F$^{19}{\rm F}$ NMR relaxation experiments, a titration‐free method that requires no isotopic labeling.
Simon H. Rüdisser, Gabriela Stadler, Alvar D. Gossert   +2 more
wiley   +2 more sources

Differential changes of trichloroethylene degradation efficiency and carbon isotope fractionation during oxygenation of different Fe(ii) species. [PDF]

RSC Adv
Chen R, Liu J, Yu H.
europepmc   +1 more source

Carbon isotope fractionation by an ancestral rubisco suggests that biological proxies for CO₂ through geologic time should be reevaluated. [PDF]

Proc Natl Acad Sci U S A, 2023
Wang RZ, Nichols RJ, Liu AK, Flamholz AI, Artier J, Banda DM, Savage DF, Eiler JM, Shih PM, Fischer WW.   +9 more
europepmc   +1 more source

Copper(II/III) Redox Couple Enables C─H Methylation via a Radical Mechanism Analogous to SAM Enzymes

Angewandte Chemie, EarlyView.
Biological C–H methylation proceeds through radical pathways mediated by one‐electron redox cofactors, yet no synthetic model has reproduced this reactivity. Here, we report the first isolable Cu(II/III)–methyl complexes that mediate C–H methylation through hydrogen atom transfer and methyl radical rebound.
Emily N. Doss, Curtis E. Moore, Shiyu Zhang   +2 more
wiley   +2 more sources

Leaf carbon isotope composition: a key proxy for scaling up the best candidates. [PDF]

J Exp Bot
Mateus NS, Lavres J.
europepmc   +1 more source

Reply to: Re-examining extreme carbon isotope fractionation in the coccolithophore Ochrosphaera neapolitana. [PDF]

Nat Commun, 2022
Liu YW, Eagle RA, Aciego SM, Gilmore RE, Ries JB.   +4 more
europepmc   +1 more source

Photochemical Ring Opening of Cyclopropyl Silyl Ethers Enables β–β Coupling, Radical‐Polar Crossover and Annulation

Angewandte Chemie, EarlyView.
A photochemical platform enables β–β coupling of cyclopropyl silyl ethers with electron‐deficient alkenes. The resulting adducts serve as entry points into annulative and radical–polar crossover pathways, providing rapid access to fused, bridged, and spirocyclic architectures, including late‐stage scaffold diversification to diterpene‐like carbocyclic ...
Jacop Rydén, Eilidh Young, Wilma Olsson, Eskil Flodén, Mattias Tan, Sebastian Clementson   +5 more
wiley   +2 more sources