Fe-containing ionic liquids as effective and recoverable oxidants for dissolution of UO2 in the presence of imidazolium chlorides
摘要:
咪唑基含铁离子液体(IL)可在相应的咪唑氯化物存在下直接溶解二氧化铀,而无需额外的氧化剂。溶解过程最初遵循伪一阶动力学。拉曼光谱研究表明,FeCl42- 是二氧化铀溶解后的主要还原产物,而衰减全反射-傅里叶变换红外光谱则表明,UO22+ 复合物是 IL 中的主要产物。通过离心和溶剂萃取相结合的方法,可以成功地将溶解的铀酰物种从含铁离子惰性气体中分离出来,而且含铁离子惰性气体也很容易回收。总之,在有咪唑氯化物存在的情况下,咪唑基含铁离子液体可用作溶解二氧化铀的有效且可回收的氧化剂。
Ionothermal carbonization in [Bmim][FeCl4]: an opportunity for the valorization of raw lignocellulosic agrowastes into advanced porous carbons for CO2 capture
Selective catalytic tailoring of the H unit in herbaceous lignin for methyl <i>p</i>-hydroxycinnamate production over metal-based ionic liquids
作者:Zhangmin Li、Zhenping Cai、Qiang Zeng、Tian Zhang、Liam John France、Changhua Song、Yaqin Zhang、Hongyan He、Lilong Jiang、Jinxing Long、Xuehui Li
DOI:10.1039/c8gc01252k
日期:——
HSQC demonstrated that the H unit was preferentially tailored fromlignin, of which, 86.0 wt% of the H structure unit is cut off fromlignin, with 70.6% being selectively converted to MPC. Further investigation demonstrated that MBIL prefers to tailor ester bonds compared to ether bonds using model compounds, and the superior catalytic ester bond cleavage performance exhibited by [Bmim][FeCl4] can be
木质素的选择性增值以实现高价值和商品化学品正受到越来越多的关注。在这项工作中,一种有效的和可重复使用的金属系离子性液体(MBIL)中的混合物中选择性的剪裁开发p香豆酸酯(p CA),一个典型的p -羟基苯基(H)单元,成甲基p -hydroxycinnamate(MPC )。在优化的条件下,在催化剂[Bmim] [FeCl 4 ]的存在下,获得了10.5 wt%的挥发性芳烃产物,其中70.5%的化合物以纯MPC的形式分离,分离产率为71.1 mg g -1。红外,1313 C NMR,ANO和2D HSQC证明H单元优先由木质素改造而成,其中86.0 wt%的H结构单元被木质素切断,其中70.6%被选择性转化为MPC。进一步的研究表明,与使用模型化合物的醚键相比,MBIL更倾向于定制酯键,并且[Bmim] [FeCl 4 ]表现出的优异的催化酯键裂解性能可归因于木质素酯键与[FeCl 4
Magnetic Ionic Liquid [bmim][FeCl4] as an Efficient Catalyst for the Synthesis of 2-Aryl Benzimidazoles and 2-Aryl Benzothiazoles Derivatives
The magnetic ionic liquid (MIL) 1-butyl-3-methylimidazolium tetrachloro ferrate(III) ([bmim][FeCl4]) sufficiently catalyzes the one-pot condensation of 1,2 diaminobenzene or 2-aminobenzenethiol with different aromatic aldehydes producing benzimidazoles and benzothiazoles drivatives, respectively. The MIL showed high performance resulting great yields with appropriate reaction time.
Tunable LCST-type phase behavior of [FeCl4]--based ionic liquids in water
作者:Yuanchao Pei、Yuan Cao、Yanjie Huang、Xinxin Song、Huiyong Wang、Yuling Zhao、Jianji Wang
DOI:10.1007/s11426-016-5577-0
日期:2016.5
In this work, 16 kinds of [FeCl4]--based magnetic ionic liquids (ILs) with different cation structures have been designed and synthesized, and their structures are characterized by IR and Raman spectroscopy. Then the lower critical solution temperature (LCST)-type phase behavior of these magnetic ILs in water is investigated as a function of concentration. It is shown that cation structure, alkyl chain length and molar ratio of FeCl3/chloride IL have a significant influence on the LCST of the mixtures. The phase separation temperature can be tuned efficiently by these factors. Meanwhile, the LCST-type phase separation process is also investigated by dynamic light scattering. The results support the mechanism that the hydrogen bonds of the [FeCl4]- anion with water have been gradually disrupted to form ILs aggregates with increasing temperature. In addition, the stability of the ILs in water is also examined in some details. These LCST-type phase separation systems may have potential applications in extraction and separation techniques at room temperature.
本研究设计并合成了 16 种具有不同阳离子结构的[FeCl4]基磁性离子液体(ILs),并利用红外光谱和拉曼光谱对其结构进行了表征。然后研究了这些磁性离子液体在水中的低临界溶液温度(LCST)型相行为与浓度的函数关系。结果表明,阳离子结构、烷基链长度和 FeCl3/chloride IL 的摩尔比对混合物的 LCST 有显著影响。相分离温度可通过这些因素进行有效调节。同时,还利用动态光散射对 LCST 型相分离过程进行了研究。结果支持[FeCl4]-阴离子与水的氢键随着温度升高而逐渐断裂形成 ILs 聚集体的机理。此外,还详细研究了 ILs 在水中的稳定性。这些 LCST 型相分离系统可能会在室温下的萃取和分离技术中得到潜在应用。
An efficient organic solvent-free solution-processing strategy for high-mobility metal chalcogenide film growth
作者:Jie Zhao、Il Jeon、Qinghua Yi、Menka Jain、Mark H. Rummeli、Pingyuan Song、Yutaka Matsuo、Guifu Zou
DOI:10.1039/c6gc02489k
日期:——
One of the primary challenges for high-quality metal chalcogenide film growth by a chemical solution approach is to avoid the use of volatile/hazardous organic solvents during the fabrication processes.
Lewis Acidic Ionic Liquid [Bmim]FeCl4 as a High Efficient Catalyst for Methanolysis of Poly (lactic acid)
作者:Huiqing Liu、Ruiyang Zhao、Xiuyan Song、Fusheng Liu、Shitao Yu、Shiwei Liu、Xiaoping Ge
DOI:10.1007/s10562-017-2138-x
日期:2017.9
was a first-order kinetic reaction with activation energy of 21.28 kJ mol−1.Graphical AbstractThe methanolysis of poly (lactic acid) (PLA) was studied using Lewisacidicionicliquid [Bmim]FexCl3x+1 (x>1) as catalyst. The effects of reaction temperature, reaction time, ionicliquid dosage and methanol dosage on methanolysis results were examined. The reusability of ionicliquid in the methanolysis of