The composition and structure of carbon produced by selective leaching of silicon carbide under hydrothermal conditions in the temperature range 300–800 °C and at pressures < 500 MPa were examined by Raman and IR spectroscopy, XRD, SEM, TEM and EDS. The results of this study have demonstrated...
(PCP)Ir (PCP = κ3-C6H3-2,6-[CH2P(t-Bu)2]2) is found to undergo oxidative addition of the methyl−oxygen bond of electron-poor methyl aryl ethers, including methoxy-3,5-bis(trifluoromethyl)benzene and methoxypentafluorobenzene, to give the corresponding aryloxide complexes (PCP)Ir(CH3...
The composition and structure of carbon produced by selective leaching of silicon carbide under hydrothermal conditions in the temperature range 300–800 °C and at pressures < 500 MPa were examined by Raman and IR spectroscopy, XRD, SEM, TEM and EDS. The results of this study have demonstrated...
Ir-catalysed formation of C-F bonds. From allylic alcohols to alpha-fluoroketones a Z1-mode through the oxygen atom (IIa) or through the methylenic carbon (IIc), or in a Z3-mode as an oxaallyl (IIb).15b,19 In step (iii), the C-F bond is formed upon reaction with the electrophi...
Ir(III) = Ir[dF(CF3)ppy]2(dtbbpy)PF6. Full size image In recent years, nickel and photoredox dual catalysis have emerged as a powerful tool for the direct C(sp3)−H functionalization of feedstock hydrocarbons by leveraging photoredox-mediated C−H activation and nickel’s unique ...
Through tuning both composition and pores, the 3D Nヾoped nanocarbon with a high ratio of sp3/sp2 on the surface exhibits a superior electrocatalytic performance for ORR than that of the commercial Pt/C in the Zn゛ir battery. The density functional theory calculation results suggest that the...
while the current transformation displayed linear regioselectivity. These suggest that the transformation most likely began with Ir-catalyzed allylic substitution, which occurred on the α‘ carbon of the delocalized carbanion19c, generating a branched intermediate that then underwent aza-Cope rearrangement ...
Infrared studies of hydrogenated amorphous carbon (a-C:H) and its alloys (a-C:H,N,F) We have used infrared (IR) absorption spectra to characterize a-C:H and its alloys (a-C:H,N,F). The samples were deposited in an rf plasma-enhanced chemica... S Liu,S Gangopadhyay,G Sreenivas,...
oxidation of CH2Br2 preferentially undergoes cleavage to deliver a bromine radical and a bromomethyl cation, which possesses a much lower free energy barrier (Scheme 5C, 12.6 kcalmol−1, path a) than the generation of a bromo carbon radical and a bromine cation (133.8 kcalmol−1, path b...
www.nature.com/scientificreports OPEN Fluorescent sp3 Defect-Tailored Carbon Nanotubes Enable NIR-II Single Particle Imaging in Live Brain Slices at Ultra-Low Excitation Doses Amit Kumar Mandal1,2, Xiaojian Wu 3, Joana S. Ferreira 4,5, Mijin Kim 3, ...