Results 201 to 210 of about 38,732 (245)

A Fluxional Copper Acetylide Cluster in CuAAC Catalysis

Angewandte Chemie - International Edition, 2015
AbstractA molecularly defined copper acetylide cluster with ancillary N‐heterocyclic carbene (NHC) ligands was prepared under acidic reaction conditions. This cluster is the first molecular copper acetylide complex that features high activity in copper‐catalyzed azide–alkyne cycloadditions (CuAAC) with added acetic acid even at −5 °C.
Bernd F Straub, Ata Makarem, Frank Rominger   +2 more
exaly   +3 more sources

Fullerenes make copper catalysis better

Science, 2022
Ethylene glycol can be reliably produced by mild hydrogenation of dimethyl ...
Gravel, Edmond, Doris, Eric
openaire   +4 more sources

Copper(II) Catalysis of Water Oxidation

Angewandte Chemie International Edition, 2012
Copper leads to a breakup: simple Cu(II) salts are shown to be highly reactive as water oxidation electrocatalysts in neutral to weakly basic aqueous buffer solutions of CO(2)/HCO(3)(-)/CO(3)(2-) or HPO(4)(2-)/PO(4)(3-). Coordination to the buffer anions under these conditions prevents the precipitation of Cu(OH)(2), CuCO(3), or Cu(3)(PO(4))(2) and ...
Zuofeng, Chen, Thomas J, Meyer
openaire   +2 more sources

Bidirectional Catalysis by Copper-Containing Nitrite Reductase

Biochemistry, 2004
The copper-containing nitrite reductase from Alcaligenes faecalis S-6 was found to catalyze the oxidation of nitric oxide to nitrite, the reverse of its physiological reaction. Thermodynamic and kinetic constants with the physiological electron donor pseudoazurin were determined for both directions of the catalyzed reaction in the pH range of 6-8.
Wijma, H.J., Canters, G.W., Vries, S. de, Verbeet, M.P.   +3 more
openaire   +3 more sources

Copper Catalysis That Clicks

Chemical & Engineering News Archive, 2013
The copper-catalyzed addition of azides and alkynes to form triazoles has been hailed as the creme de la creme of click chemistry—a way to assemble molecules via rapid, irreversible reactions. It is an efficient way to make biological probes, novel polymers, drug candidates, and smart materials.
openaire   +1 more source

Copper and Copper Oxide Nanoparticles : Applications in Catalysis

2019
Copper and Copper oxide nanoparticles (Cu NPs) have attracted considerable interest because of their catalytic, optical, mechanical and electrical conducting properties. The earth-abundant and inexpensive copper metal, have generated a great deal of interest specially in the field of catalysis.
Khedkar, Mayur, Michael, Pratik E. P., Khan, Shoeb R.   +2 more
openaire   +1 more source

ChemInform Abstract: Copper in Catalysis

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire   +1 more source

Copper catalysis in a blue light

Science, 2016
Visible light, copper, and a phosphine ligand combine for C-N bond formation at fully substituted chiral centers [Also see Report by Kainz et al. ]
openaire   +1 more source

Enantioselective Decarboxylative Cyanation Employing Cooperative Photoredox Catalysis and Copper Catalysis

Journal of the American Chemical Society, 2017
The merger of photoredox catalysis with asymmetric copper catalysis have been realized to convert achiral carboxylic acids into enantiomerically enriched alkyl nitriles. Under mild reaction conditions, the reaction exhibits broad substrate scope, high yields and high enantioselectivities.
Dinghai Wang, Na Zhu, Pinhong Chen, Zhenyang Lin, Guosheng Liu   +4 more
openaire   +3 more sources

Trivalent copper catalysis of the autoxidation of copper(II) tetraglycine

Inorganic Chemistry, 1978
Oxygen reacts with copper(I1) tetraglycine (G4) solutions at pH 7-9 to give CUI~'(H-~G~)(where H-, refers to three deprotonated peptide nitrogens coordinated to copper) as an intermediate leading to the oxidation of the peptide, A dehydropeptide which hydrolyzes to diglycinamide and glyoxylglycine is the major product of the peptide oxidation.
James L. Kurtz, Gary L. Burce, Dale W. Margerum   +2 more
openaire   +1 more source