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.
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
the Re complexes imparted photoluminescence to the NPs, with blue shifted emission and higher photoluminescence quantum yields with respect to the free [Re(phen)(CO)3(py-upts)]+ complex (λem 553 vs. 580 nm, Φ 0.060 vs. 0.038, in aerated water solution). The complexesembedded into the NPs maintained a satisfactory efficiency toward 1O2 generation (quantum yields 0.21 vs. 0.26 for the free complex, as
制备了具有对光动力疗法有用的性质的双磁光纳米探针。它由超顺磁性氧化铁(SPIO)芯(直径尺寸分布集中在大约10 nm处)构成,该芯通过油酸铁的热分解获得,并涂有致密的二氧化硅外壳,并在反向微乳液环境中生长。发光[Re(phen)(CO)3(py)] CF 3 SO 3通过用三乙氧基硅烷部分官能化吡啶配体,将配合物共价锚定在二氧化硅壳上。最后,在纳米颗粒(NPs)的表面涂上一层用三乙氧基硅烷官能化的聚乙二醇(PEG),以改善生理条件下的稳定性和隐身性。这些SPIO @ SiO 2 -Re @ PEG纳米复合材料的透射电子显微镜显示一个单一的种群,其大小分布集中在大约。40纳米 NPs显示出核弛豫值,可确保在磁共振成像中产生可观的对比度(r 2 > 30 s -1 mM -1在高于5 MHz的频率下)。了Re的存在赋予的配合物的光致发光的纳米颗粒,具有蓝移发射和更高的光致发光量子产率相对于所述