5 research outputs found
Prise en charge de grévistes de la faim lors du jeûne et de la renutrition (à partir de 19 cas)
LYON1-BU Santé (693882101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
PLATO N-DPU on-board software: an ideal candidate for multicore scheduling analysis
International audienc
PLATO N-DPU on-board software: an ideal candidate for multicore scheduling analysis
International audienc
PLATO N-DPU on-board software: an ideal candidate for multicore scheduling analysis
International audienc
Regime Switch in the DualâCatalyzed Coupling of Alkyl Silicates with Aryl Bromides
International audienceAbstract Metallaphotoredox catalyzed crossâcoupling of an arylbromide (ArâBr) with an alkyl bis(catecholato)silicate (RâSi â ) has been analyzed in depth using a continuum of analytical techniques (EPR, fluorine NMR, electrochemistry, photophysics) and modeling (microâkinetics and DFT calculations). These studies converged on the impact of four control parameters consisting in the initial concentrations of the iridium photocatalyst ([Ir] 0 ), nickel precatalyst ([Ni] 0 ) and silicate ([RâSi â ] 0 ) as well as light intensity I 0 for an efficient reaction between ArâBr and RâSi â . More precisely, two regimes were found to be possibly at play. The first one relies on an equimolar consumption of ArâBr with RâSi â smoothly leading to ArâR, with no sideâproduct from RâSi â and a second one in which RâSi â is simultaneously coupled to ArâBr and degraded to RâH. This integrative approach could serve as a case study for the investigation of other metallaphotoredox catalysis manifolds of synthetic significance