Vorobyeva, Evgeniya; Gerken, Viktoria C.; Mitchell, Sharon; Sabadell-Rendon, Albert; Hauert, Roland; Xi, Shibo; Borgna, Armando; Klose, Daniel; Collins, Sean M.; Midgley, Paul A.; Kepaptsoglou, Demie M.; Ramasse, Quentin M.; Ruiz-Ferrando, Andrea; Fako, Edvin; Ortuno, Manuel A.; Lopez, Nuria; Carreira, Erick M.; Perez-Ramirez, Javier published the artcile< Activation of Copper Species on Carbon Nitride for Enhanced Activity in the Arylation of Amines>, Recommanded Product: 1-(4-Bromophenyl)-1H-pyrazole, the main research area is graphitic carbon nitride copper activation amine arylation.
We report the promoting effect of graphitic carbon nitride in Cu-catalyzed N-arylation. The abundance of pyridinic coordination sites in this host permits the adsorption of copper iodide from the reaction medium. The key to achieving high activity is to confine active Cu species on the surface, which is accomplished by introducing atomically dispersed metal dopants to block diffusion into the bulk of the carrier. The alternative route of incorporating metal during the synthesis of graphitic carbon nitride is ineffective as Cu is thermodynamically more stable in inactive subsurface positions. A combination of X-ray absorption, X-ray photoelectron, and ESR spectroscopy, d. functional theory, and kinetic Monte Carlo simulations is employed to determine the location and associated geometry as well as the electronic structure of metal centers. N-Arylation activity correlates to the surface coverage by copper, which varies during the reaction due to an interplay between site formation via adsorption from the reaction medium and deactivation by diffusion into the bulk of the material, and is highest when an Fe dopant is used to hinder such movement through the lattice.
ACS Catalysis published new progress about Adsorption (of CuI). 13788-92-6 belongs to class pyrazoles-derivatives, and the molecular formula is C9H7BrN2, Recommanded Product: 1-(4-Bromophenyl)-1H-pyrazole.
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics