Temperature dependence of the field induced magnetic form factor of the intermediate valence compound CePd3
Polarized neutron scattering techniques have been used to obtain information regarding the ground state electronic properties of the intermediate valence compound CePd3. The spatial distribution of the magnetization induced by a magnetic field of 42.5 kG in a single crystal of CePd3 has been studied at 100 and 4.2 K. We find that at 100 K the measured form factor is in good agreement with the free‐ion 4f magnetic form factor of Ce3+. At 4.2 K on the other hand, deviations from a 4f magnetic factor were observed. An adequate fit to the experimental data taken at 4.2 K can be obtained by assuming that the induced magnetization contains a significant component (∼17% of the total) of Ce–5d electronic character.
Finding environmentally gentle methods to graft Lewis acid on the surface of mesoporous materials is a topic of current interest. Herein we describe the optimization of a preparation procedure of a mesoporous silica-supported ErIII catalyst using the microwave-assisted post-calcination functionalization of Mobil Composition of Matter-41 silica as the key step. The required time for functionalization was reduced from several hours to 10 min using sealed-vessel microwave technology. Control experiments using conventional heating at the same temperature demonstrated that the rate increase is owing to a simple thermal/kinetic effect as a result of the higher reaction temperature. The resulting ErIII catalyst was tested for the first time as a catalyst in the continuous flow deprotection of benzaldehyde dimethylacetal and a complete leaching study was performed.