Controllable Synthesis of Mesoporous Iron Oxide Nanoparticle Assemblies for Chemoselective Catalytic Reduction of Nitroarenes
作者:Ioannis T. Papadas、Stella Fountoulaki、Ioannis N. Lykakis、Gerasimos S. Armatas
DOI:10.1002/chem.201504685
日期:2016.3.18
electronics to magnetism, and catalysis. Recent efforts have targeted new nanostructured forms of Fe2O3 with high surface area‐to‐volume ratio and large pore volume. Herein, the synthesis of 3D mesoporousnetworks consisting of 4–5 nm γ‐Fe2O3 nanoparticles by a polymer‐assisted aggregating self‐assembly method is reported. Iron oxide assemblies obtained from the hybrid networks after heat treatment have
氧化铁(III)是一种低成本材料,其应用范围从电子学到磁学和催化学。最近的工作针对具有高表面积体积比和大孔体积的新型纳米结构Fe 2 O 3。在此,由4-5纳米γ -铁的三维中孔网络的合成2 ö 3报道由聚合物辅助聚集自组装方法的纳米颗粒。热处理后从混合网络中获得的氧化铁组件具有开孔结构,具有高表面积(最大167 m 2 g -1)和均匀的孔(约6.3 nm)。构成氧化铁纳米晶体可以从经历可控相变了γ-Fe 2ø 3到的α-Fe 2 ö 3和成Fe 3 ö 4不同退火条件下,同时保持三维结构和开放的孔隙。这些新的集成结构显示出高催化活性和稳定性,即使在大规模合成中,也可以选择性地将芳基和烷基硝基化合物还原为相应的芳基胺和肟。
Dynamic Path Bifurcation in the Beckmann Reaction: Support from Kinetic Analyses
excellent linear correlations with slopes of near unity. The results support the occurrence of path bifurcation after the rate-determining TS of the Beckmann rearrangement/fragmentation reaction, which has previously been proposed on the basis of molecular dynamics simulations. It was concluded that path-bifurcation phenomenon could be more common than thought and that a reactivity-selectivity argument based
作者:Langhals, Heinz、Range, Guenter、Wistuba, Eckehardt、Ruechardt, Christoph
DOI:——
日期:——
Synthesis and monoamine transporter binding properties of 2β-[3′-(substituted benzyl)isoxazol-5-yl]- and 2β-[3′-methyl-4′-(substituted phenyl)isoxazol-5-yl]-3β-(substituted phenyl)tropanes
作者:Chunyang Jin、Hernán A. Navarro、Kevin Page、F. Ivy Carroll
DOI:10.1016/j.bmc.2008.05.073
日期:2008.7
A series of 2 beta-[3'-(substituted benzyl)isoxazol-5-yl]- and 2 beta-[3'-methyl-4'-(substituted phenyl)isoxazol-5- yl]-3 beta-(substituted phenyl)tropanes were prepared and evaluated for affinities at dopamine, serotonin, and norepinephrine transporters using competitive radioligand binding assays. The 2 beta-[3'-(substituted benzyl)isoxazol-5-yl]-3 beta-(substituted phenyl)tropanes (3a-h) showed high binding affinities for the dopamine transporter (DAT). The IC50 values ranged from 5.9 to 22 nM. On the other hand, the 2 beta-[3'-methyl- 4'-(substituted phenyl)isoxazol-5-yl]-3 beta-(substituted phenyl)tropanes (4a-h), with IC50 values ranging from 65 to 173 nM, were approximately 3- to 25-fold less potent than the corresponding 2 beta-[ 3'-(substituted benzyl)isoxazol] tropanes. All tested compounds were selective for the DAT relative to the norepinephrine transporter (NET) and serotonin transporter (5-HTT). 3 beta-(4-Methylphenyl)-2 beta-[3'-(4-fluorobenzyl)isoxazol-5-yl] tropane (3b) with IC50 of 5.9 nM at the DAT and K(i)s of 454 and 113 nM at the NET and 5-HTT, respectively, was the most potent and DAT-selective analog. Molecular modeling studies suggested that the rigid conformation of the isoxazole side chain in 4a-h might play an important role on their low DAT binding affinities. (c) 2008 Elsevier Ltd. All rights reserved.
Jacobsen et al., Skandinavisches Archiv fur Physiologie, 1938, vol. 79, p. 258,280