Results 1 to 10 of about 533 (84)

Mechanistic Insights and Catalytic Efficiency of a 2,2'-Bipyridine-Coordinated Peroxidovanadium Complex as a Haloperoxidase Biomimetic. [PDF]

Chempluschem
A peroxidovanadium(V) complex mimics vanadium haloperoxidases for eco‐friendly halogenation of organic substrates. Density functional theory studies reveal two major reaction pathways for iodide/bromide oxidation. The catalyst offers high‐yield bromination/iodination of 8‐hydroxyquinoline (73/86%) under mild conditions (30 °C, pH 5.8), and it also ...
Fachini LG, Elisandro EVS, Baptistella GB, Bottini RCR, Briganti M, Nunes GG, de Sá EL.   +6 more
europepmc   +2 more sources

Continuous-Wave (CW) Photo-CIDNP NMR Spectroscopy: A Tutorial. [PDF]

Magn Reson Chem
ABSTRACT Photo‐chemically induced dynamic nuclear polarisation (photo‐CIDNP) is a nuclear spin‐selective magnetic resonance phenomenon that has traditionally been used to mechanistically study chemical reactions involving the (transient) formation of radical molecular species, extract EPR observables of short‐lived radicals, probe biomolecular ...
Kuhn LT, Pérez-Trujillo M.
europepmc   +2 more sources

Cupin-Type Dimethylsulfoniopropionate Lyase from Pelagibacter ubique (DddK_Pu) Catalyzes Aza-Michael Addition of Primary and Secondary Amines to Acrylic Acid. [PDF]

Angew Chem Int Ed Engl
A dimethylsulfoniopropionate lyase (DddK) was identified as an efficient aza‐Michaelase for the addition of amines to acrylate. Screening 74 amines with wild‐type DddK and its W26G variant yielded N‐substituted and N,N‐disubstituted β‐amino acids in 30%–93% isolated yield.
Arceri D, Mourelle A, Parella T, Bujons J, Moreno CJ, Clapés P.   +5 more
europepmc   +2 more sources

(Bio)Functionalisation of Metal–Organic Polyhedra by Using Click Chemistry

Chemistry – A European Journal, Volume 29, Issue 60, October 26, 2023., 2023
Copper(I)‐catalysed alkyne‐azide cycloaddition click chemistry is a versatile post‐synthetic tool to functionalize the surface chemistry of alkyne‐functionalized cuboctahedral Metal–Organic Polyhedra (MOPs). This methodology enables quantitative functionalization of MOPs with a wide range of functional groups, including polymers, carboxylic and ...
Laura Hernández‐López, Cornelia von Baeckmann, Jordi Martínez‐Esaín, Alba Cortés‐Martínez, Jordi Faraudo, Caterina Caules, Teodor Parella, Daniel Maspoch, Arnau Carné‐Sánchez   +8 more
wiley   +1 more source

Synthese von C60/[10]CPP‐Catenanen durch Regioselektive Nanokapsel‐Templierte Bingel Bis‐Addition

Angewandte Chemie, Volume 135, Issue 42, October 16, 2023., 2023
Die Kombination von drei Methoden (Tether, Nanohoop‐Template und supramolekulare Schattenmaske) ermöglichte die itero‐ und regioselektive Synthese von [2]Catenanen durch Bis‐Addition von Bis‐Bromomalonaten an den Komplex C60⸦[10]CPP. Die Verwendung einer „spurlosen“ Nanokapsel‐Schattenmaske war der Schlüssel für eine 87 %ige Selektivität für das „in ...
Fabian M. Steudel, Ernest Ubasart, Luigi Leanza, Míriam Pujals, Teodor Parella, Giovanni M. Pavan, Xavi Ribas, Max von Delius   +7 more
wiley   +1 more source

Synthesis of C60/[10]CPP‐Catenanes by Regioselective, Nanocapsule‐Templated Bingel Bis‐Addition

Angewandte Chemie International Edition, Volume 62, Issue 42, October 16, 2023., 2023
The combination of three approaches (tether, nanohoop template & supramolecular shadow mask) enabled the itero‐ and regioselective synthesis of [2]catenanes via bis‐addition of bis‐bromomalonates to the complex C60⸦[10]CPP. The use of a “traceless” nanocapsule shadow mask was key for obtaining 87 % selectivity for the “in,out‐trans‐3′′ product, where ...
Fabian M. Steudel, Ernest Ubasart, Luigi Leanza, Míriam Pujals, Teodor Parella, Giovanni M. Pavan, Xavi Ribas, Max von Delius   +7 more
wiley   +1 more source

A Polymeric Nanoparticle Formulation for Targeted mRNA Delivery to Fibroblasts

Advanced Science, Volume 10, Issue 5, February 14, 2023., 2023
Messenger RNA (mRNA) is a promising tool to deliver therapeutic proteins in many diseases, including fibrotic disorders. Here, a polymeric nanoparticle formulation is developed after high‐throughput screening of 152 polymers in a fibroblast model.
Artur Filipe Rodrigues, Catarina Rebelo, Susana Simões, Cristiana Paulo, Sónia Pinho, Vítor Francisco, Lino Ferreira   +6 more
wiley   +1 more source

Enrichment of hepatic glycogen and plasma glucose from H₂18O informs gluconeogenic and indirect pathway fluxes in naturally feeding mice

NMR in Biomedicine, Volume 36, Issue 2, February 2023., 2023
18O‐enrichment of liver glycogen, triglyceride glycerol, and blood glucose of mice given 18O‐water during overnight feeding was quantified by 13C NMR and MS. Glycogen 18O‐enrichment of oxygens 3, 5, and 6 from isotope‐shifted 13C signals informed indirect pathway contributions from different sources.
Margarida Coelho, Rohit Mahar, Getachew D. Belew, Alejandra Torres, Cristina Barosa, Fernando Cabral, Ivan Viegas, Amalia Gastaldelli, Vera M. Mendes, Bruno Manadas, John G. Jones, Matthew E. Merritt   +11 more
wiley   +1 more source

Unravelling the Mechanistic Pathway of the Hydrogen Evolution Reaction Driven by a Cobalt Catalyst

Angewandte Chemie, Volume 134, Issue 40, October 4, 2022., 2022
A CoI complex bearing a redox‐active κ‐N3P2 pentadentate ligand and its activity towards hydrogen evolution reaction is reported in this work. A combination of spectroscopic, electrochemical and computational techniques is employed to characterize the intermediate species, demonstrating an unusual homolytic coupling reaction pathway between two ...
Bing Jiang, Marcos Gil‐Sepulcre, Pablo Garrido‐Barros, Carolina Gimbert‐Suriñach, Jia‐Wei Wang, Jordi Garcia‐Anton, Pau Nolis, Jordi Benet‐Buchholz, Nuria Romero, Xavier Sala, Antoni Llobet   +10 more
wiley   +1 more source

Electrochemically Mediated Atom Transfer Radical Polymerization Driven by Alternating Current

Angewandte Chemie, Volume 136, Issue 29, July 15, 2024.
The study introduces alternating current (AC) electrolysis in ATRP using a symmetrical Cu/Cu electrode pair to generate the CuI activator complex and drive the polymerization. Square and sinusoidal waves at 0.1 Hz from an AC generator were used to polymerize many monomers (including functionals) in organic solvent, water, and bulk.
Francesco De Bon, Marco Fantin, Vanessa A. Pereira, Teresa J. Lourenço Bernardino, Armenio C. Serra, Krzysztof Matyjaszewski, Jorge F. J. Coelho   +6 more
wiley   +2 more sources