Various metal organic frameworks combined with imidazolium, quinolinum and benzothiazolium ionic liquids for removal of three antibiotics from water
摘要:
In this research, imidazolium, quinolinum and benzothiazolium based ionic liquids (ILs) were immobilized on a metal organic framework (MOF) by solvent impregnation or capillary action. The synthesized IL@MOF composite materials were characterized by FTIR, XRD, SEM and TGA methods and then applied in removal of tetracyclines (TCs) from aqueous samples. The presence of ionic liquids significantly improved the adsorption efficiency of the metal organic framework, with 82% or higher removal percentage was obtained for the three target TCs while the pristine MOB adsorption efficiency was below 50%. This could be attributed to the ability of ILs to make complex interaction with target drugs via multiple intermolecular forces. Experimental results revealed the effects of three significant factors including pH, temperature and solid-liquid ratio, and optimum adsorption efficiency could be achieved at pH 8 and 30 degrees C when solid-liquid ratio 1:2 was adopted. The adsorption kinetics was properly fitted with pseudo-second order model and Redlich-Peterson model could be used to describe the adsorption isotherm for three antibiotics; moreover, the adsorption was an endothermic and spontaneous process in nature. Finally, the adsorbed TCs could be desorbed efficiently and the performance of the IL@MOF sorbent was further verified by actual water samples. (C) 2020 Published by Elsevier B.V.
The one-pot synthesis of butyl-1H-indol-3-alkylcarboxylic acid derivatives in ionic liquid as potent dual-acting agent for management of BPH
作者:Li-Yan Zeng、Fubiao Yang、Kaixuan Chen、Yunong Zeng、Zhenzhou Jiang、Shuwen Liu、Baomin Xi
DOI:10.1016/j.ejmech.2020.112616
日期:2020.11
H-indol-3-yl)butanoic acid 4aaa was designed against BPH and synthesized by two steps of N-alkylation. One-pot protocol towards 4aaa was newly developed. With IL [C6min]Br as solvent, the yield of 4aaa was increased to 75.1 % from 16.0 % and the reaction time was shortened in 1.5 hours from 48 hours. 25 Derivatives structurally based on arylpiperazine and indolyl butyric acid with alkyl linker were
Supramolecular polymeric aggregation behavior and its impact on catalytic properties of imidazolium based hydrophilic ionic liquids
作者:Shoaib Muhammad、Muhammad Naveed Javed、Firdous Imran Ali、Ahmed Bari、Imran Ali Hashmi
DOI:10.1016/j.molliq.2019.112372
日期:2020.2
(ILs) self-assemble to form supramolecularpolymeric clusters/aggregates. The aggregation behavior of ILs influences its activity in the organic synthesis. However, the precise role of ILs in organic reactions is still unknown. It is, therefore, important to comprehend the supramolecularpolymeric aggregation behavior of ILs. We are exploring the supramolecularpolymeric aggregation behavior of ILs
离子液体(ILs)自组装形成超分子聚合物簇/聚集体。IL的聚集行为影响其在有机合成中的活性。但是,IL在有机反应中的确切作用仍是未知的。因此,重要的是要理解IL的超分子聚合聚集行为。我们正在使用电喷雾电离质谱(ESI-MS)探索IL的超分子聚合聚集行为。我们已经合成了四个亲水性IL(1-4),并研究了它们的聚集行为及其对碳-碳键形成(Knoevenagel和Claisen-Schmidt缩合)催化活性的影响。在这里,我们表明IL的聚集行为取决于阳离子和阴离子的类型和性质。ESI-MS(-ve)光谱揭示了两种不同类型的聚集,即[C n A n + 1 ] -和[A 2 + H + ] -。我们发现,催化活性随[C n A n + 1 ] -超分子聚集的增加而增加。因此,在IL中获得的最高收率的产品显示出阴离子-阴离子聚集的减少[A 2 + H +] – ESI-MS中的丰度。我们预计我们
Facile aromatic nucleophilic substitution (S<sub>N</sub>Ar) reactions in ionic liquids: an electrophile–nucleophile dual activation by [Omim]Br for the reaction
作者:Xiao Zhang、Guo-ping Lu、Chun Cai
DOI:10.1039/c6gc01742h
日期:——
A facile aromatic nucleophilic substitutionreaction (SNAr) in recyclable [Omim]Br under relatively mild conditions has been described. An electrophile-nucleophile dual activation by [Omim]Br is also discovered based on control experiments,...
Liquid Phase Behavior of Imidazolium-Based Ionic Liquids with Alcohols
作者:Jacob M. Crosthwaite、Sudhir N. V. K. Aki、Edward J. Maginn、Joan F. Brennecke
DOI:10.1021/jp037774x
日期:2004.4.1
ionic liquids with alcohols. All systems examined showed upper critical solution temperature (UCST) behavior, with low solubility of the ionic liquid in the alcohol and high solubility of the alcohol in the ionic liquid. An increase in the alkyl chain length of the alcohol resulted in an increase in the UCST. Branching of the alcohol resulted in a higher solubility of the alcohol in the ionic-liquid-rich