Synthesis of mesoporous metal complex-silica materials and their use as solvent-free catalysts

“Arctic apples” – transgene Äpfel, die nicht braun werden

“…The main advantages of this approach are that it does not require anaerobic or anhydrous environments, and it is performed under mild conditions, preserving the integrity of the metal complexes in the framework, ensuring an homogeneous dispersion along the support and avoiding the pore blocking 5. This methodology has already been used to incorporate metal nanoparticles and metal complexes in mesoporous silica and organosilica supports 5b–e. Monomer complexes have been prepared under the same reaction conditions and characterised fully before the formation of the mesoporous materials by spectroscopic (FTIR, Raman, UV/Vis) and spectrometric techniques.…”

An imidazolium-based organopalladium-functionalized organic–inorganic hybrid silica promotes one-pot tandem Suzuki cross coupling–reduction of haloacetophenones and arylboronic acids

“…The organopalladium-functionalized heterogeneous catalyst, abbreviated as PdPPh 2 -IBOIHS (3) [PdPPh 2 : [26,27]], was prepared as outlined in Scheme 1. Firstly, the imidazolium-based IBOIHS (1) was synthesized via the hydrolysis-condensation of 1,3-bis(3-(triethoxysilyl)propyl)-1 H-imidazol-3-ium iodide according to the reported method [28,29].…”

Silver metal nano-matrixes as high efficiency and versatile catalytic reactors for environmental remediation

“…The NMMs were also found to be stabilized with specific functionalization of the silica surface with MPTMS. The surface grafting of MPTMS, which was previously shown to simultaneously reduce the pore size and volume across the silica aerogel and alter the surface charge and reactivity of silica surfaces522, was found to form more homogeneous NMMs with a higher density of nano-sized particulates (Figs 1 and S2). At MTPMS concentrations below 1 M, this was primarily attributed to the increased concentration of metal nano-particle seeds occurring after MPTMS grafting.…”