Condensation of 3-triethoxysilylpropylamine with malonic amide was studied. The condensation products, dicarboxylic acid diamides (malonic and phthalic), were used for peretherification with triethanolamine and thus new representatives of silatran series compounds were prepared: N,N'-bis(3-triethoxysilyl)malonic diamide and -phthalic diamide. By hydrolytic polycondensation of N,N'-bis(3-triethoxysilyl)malonic diamide we synthesized an organosilicon polymer with silsesquioxane structure, which we studied as a sorbent of platinum group metals rhodium, palladium and platinum. Peculiar features of sorption activity of the polymer and speculative mechanism of metal sorption are discussed.
Condensation of 3-triethoxysilylpropylamine with malonic amide was studied. The condensation products, dicarboxylic acid diamides (malonic and phthalic), were used for peretherification with triethanolamine and thus new representatives of silatran series compounds were prepared: N,N'-bis(3-triethoxysilyl)malonic diamide and -phthalic diamide. By hydrolytic polycondensation of N,N'-bis(3-triethoxysilyl)malonic diamide we synthesized an organosilicon polymer with silsesquioxane structure, which we studied as a sorbent of platinum group metals rhodium, palladium and platinum. Peculiar features of sorption activity of the polymer and speculative mechanism of metal sorption are discussed.
Dumbbell‐Shaped T
<sub>8</sub>
‐POSS with Functional Organic Linkers
作者:Nadège Rey、Sophie Carenco、Carole Carcel、Armelle Ouali、David Portehault、Michel Wong Chi Man、Clément Sanchez
DOI:10.1002/ejic.201900284
日期:2019.7.23
New dumbbell‐shaped octasilsesquioxanes (T8‐POSS) are obtained by the condensation of organobridged silane precursors with partially condensed T7‐triol. The synthesis based on corner‐capping proceeds under mild reaction conditions (60 °C in toluene) upon a nucleophilic fluoride‐catalyzed condensation of the T7‐triol with the alkoxysilyl organics. Two dumbbell‐type T8‐POSS, one with a non‐symmetrical
Sol–gel immobilized and reusable copper-catalyst for arylation of phenols from aryl bromides
作者:Sofia Benyahya、Florian Monnier、Michel Wong Chi Man、Catherine Bied、Fouad Ouazzani、Marc Taillefer
DOI:10.1039/b905205d
日期:——
A simple β-diamide ligand was immobilized by the solâgel process on hybrid silica for Cu-mediated O-arylation reactions. Combined with 5% of CuI, the latter can easily be recovered and reused to generate diarylethers under smooth conditions from cheap aryl bromides in an eco-friendly solvent (MIBK). Besides, negligible metal leaching occurred after reaction in solution from the supported catalyst.
New hybrid silica based materials for the solid–liquid extraction of actinides
作者:JeanCharles Broudic、Olivier Conocar、Joël J. E. Moreau、Daniel Meyer、Michel Wong Chi Man
DOI:10.1039/a904454j
日期:——
New hybrid silica based materials containing malonamide ligands have been prepared by solâgel hydrolysis condensation of functionalised precursors. These hybrids proved to be highly efficient extracting solids which compare favorably to related silica materials.
作者:M. G. Voronkov、L. I. Belousova、Yu. N. Pozhidaev、N. N. Vlasova
DOI:10.1023/a:1014219722025
日期:——
Condensation of 3-triethoxysilylpropylamine with malonic amide was studied. The condensation products, dicarboxylic acid diamides (malonic and phthalic), were used for peretherification with triethanolamine and thus new representatives of silatran series compounds were prepared: N,N'-bis(3-triethoxysilyl)malonic diamide and -phthalic diamide. By hydrolytic polycondensation of N,N'-bis(3-triethoxysilyl)malonic diamide we synthesized an organosilicon polymer with silsesquioxane structure, which we studied as a sorbent of platinum group metals rhodium, palladium and platinum. Peculiar features of sorption activity of the polymer and speculative mechanism of metal sorption are discussed.