Synthesis of novel magnetic nanoparticles with urea or urethane moieties: Applications as catalysts in the Strecker synthesis of α-aminonitriles
作者:Saeed Baghery、Mohammad Ali Zolfigol、Romana Schirhagl、Masoumeh Hasani、Marc C.A. Stuart、Andreas Nagl
DOI:10.1002/aoc.3883
日期:2017.12
Four novel magneticnanoparticlecatalysts with urea or urethane moieties are reported. The silica‐coated magneticnanoparticles were simply functionalized via addition of 3‐(triethoxysilyl)propylisocyanate (TESPIC), amine or amino alcohol. TESPIC with dual labile functional groups was used as a suitable precursor for the synthesis of urethane‐based catalysts. The newly synthesized catalysts were fully
Ion-fuelled L-Phenylalanine controlled pumping by hybrid membrane materials
作者:Pascal Blondeau、Mihail Barboiu、Eddy Petit
DOI:10.1016/j.reactfunctpolym.2014.08.002
日期:2015.1
We report organic-inorganic membrane materials for controlled translocation of ion-pairs along directional conduction pathways. The supramolecular/sol-gel combined procedure has been realised in two steps. First, the self-organization properties of 3-(ureidoarene)propyltriethoxysilane compound, 1 in aprotic solvents were determined, revealing the formation of supramolecular oligomers, in the self-assembly step. They led in a second sal-gel transcription step to hybrid membrane materials. Then, the transport of organic molecules of variable charge, like L-Phenylalanine can be directionally tuned, via ion-fuelled membrane polarization phenomena. Using this strategy, the transport of the cationic, zwitter-ionic and anionic forms of the L-Phenylalanine can be controlled and directionally oriented from the feed to strip phase and vice versa. (C) 2014 Elsevier B.V. All rights reserved.