摘要 β-烯胺酮及其衍生物已经出现在最好的生物活性中间体中。通过在磁性可分离的钴铁氧体纳米粒子(CoFe 2 O 4 NPs)上用环状/无环的1,3-二酮处理取代的芳香族和脂肪族胺,可以实现几种β-烯酮的高收率(86-97%)。后者是在共沉淀条件下制备的。通过傅立叶变换红外光谱,X射线衍射,能量色散X射线光谱法,扫描电子显微镜,振动样品磁法和热重分析分析,确认了其纯度,精细的结晶度,元素分布,形态,磁性和热稳定性。因此,CoFe 2 O 4NPs是合成β-烯胺酮的优良绿色异质纳米催化剂,具有良好的可回收性,但其活性却微不足道。 图形概要
Molecular Precursors for ZnO Nanoparticles: Field-Assisted Synthesis, Electrophoretic Deposition, and Field-Effect Transistor Device Performance
作者:Rudolf C. Hoffmann、Shawn Sanctis、Jörg J. Schneider
DOI:10.1021/acs.inorgchem.7b01088
日期:2017.7.3
Zinc complexes with multidentate Schiff base ligands are suitable precursors for ZnO in microwave-assisted transformation reactions. [Bis(acetylacetonato)ethylenediimine]zinc(II) and [bis(methylacetoacetato)ethylenediimine]zinc(II) have been synthesized with high purity and good yield from the direct reaction of the respective diimine ligand with diethylzinc in tetrahydrofuran. The thermal decay is
具有多齿席夫碱配体的锌络合物是微波辅助转化反应中适合ZnO的前体。通过各自的二亚胺配体与二乙基锌在四氢呋喃中的直接反应,以高纯度和高收率合成了[双(乙酰丙酮基)乙撑二亚胺]锌(II)和[双(甲基乙酰乙酰基)乙撑二亚胺]锌(II)。通过热重分析和在线红外光谱研究热衰减。乙氧基乙醇中的陶瓷化反应可产生稳定的球形ZnO纳米颗粒分散体,其粒径非常小(约5–6 nm),可用于涂层和薄膜沉积过程。由这些半导体ZnO颗粒制成的薄膜组成的场效应晶体管(FET)具有6.0×10的载流子迁移率在350和450°C下处理后分别为–3和5.4×10 –2 cm 2 /(V s)。电泳沉积可在ITO(氧化铟锡)玻璃电极上提供由这些ZnO纳米颗粒组成的致密膜涂层,其厚度为30-90 nm。这些分散液中的ZnO纳米粒子的正ζ电位与阴极上的电涂覆过程一致。
作者:Ana Sanchez-Sanchez、David A. Fulton、José A. Pomposo
DOI:10.1039/c3cc48733d
日期:——
Structurally dynamicsingle-chainpolymernanoparticles that can reversibly undergo a coil to particle transition via formation and cleavage of intramolecular dynamic enamine cross-links are reported.
Facilitated transport of silver(I) cation across a bulk liquid membrane by two synthesized ligands, bis-beta-enamino ester (BBEE) and bis(benzoic acid) trioxaheptane (BBAT), as carriers dissolved in dichloromethane has been investigated. BBEE was used as a specific ion carrier for the transport of silver(I) ion. The influence of experimental parameters affecting the transport efficiency of silver(I) ion have been studied. In the presence of thiosulfate as a suitable metal ion acceptor in the receiving phase and picrate ion as ion pairing agent in the source phase, the amount of silver(I) ion transported across the liquid membrane after 120 min was found to be 97%. Tolerance to the presence of different ions was investigated and it was found that silver(I) cation transport was not affected even in the presence of 10-fold concentration of these metal cations in solution. This system was applied for the recovery of silver(I) cation from silver plating and photographic waste solution.
Gogoi; Hazarika; Konwar, Asian Journal of Chemistry, 2013, vol. 25, # 3, p. 1755 - 1756