[EN] DISSOLUTION OF CELLULOSE IN IONIC LIQUIDS<br/>[FR] DISSOLUTION DE CELLULOSE DANS DES LIQUIDES IONIQUES
申请人:UNIV TEXAS TECH SYSTEM
公开号:WO2019143802A1
公开(公告)日:2019-07-25
The present invention includes a method for dissolving cellulose comprising dissolving cellulose in an ionic liquid and a co-solvent, wherein the ionic liquid is an imidazolium-based ionic liquid with, e.g., a halide or acetate as the anion.
Investigation of physicochemical properties for novel perrhenate ionic liquid and its catalytic application towards epoxidation of olefins
作者:Zongren Song、Xueke Liu、Hao Zhang、Dawei Fang、Xiaoxue Ma
DOI:10.1007/s12039-021-01884-8
日期:2021.3
was used as a green solvent and catalyst for homogeneous catalyzed epoxidation of olefin with urea hydrogen peroxide (UHP) oxidant. The effect of factors of catalyst, oxidant, reaction time, and reaction temperature was discussed. The conversion of cyclohexene and cyclooctene is over 99% at optimum conditions. The IL [Smim][ReO4] as catalyst and solvent are characterized by high efficiency, long service
Ionic Liquids: Differential Scanning Calorimetry as a New Indirect Method for Determination of Vaporization Enthalpies
作者:Sergey P. Verevkin、Vladimir N. Emel’yanenko、Dzmitry H. Zaitsau、Ricardas V. Ralys、Christoph Schick
DOI:10.1021/jp300834g
日期:2012.4.12
scanning calorimetry (DSC) has been used to measure enthalpies of synthesis reactions of the 1-alkyl-3-methylimidazoliumbromide [Cnmim][Br] ionicliquids from 1-methylimidazole and n-alkyl bromides (with n = 4, 5, 6, 7, and 8). The optimal experimental conditions have been elaborated. Enthalpies of formation of these ionicliquids in the liquid state have been determined using the DSC results according to
Controllable Homogeneity/Heterogeneity Switch of Imidazolium Ionic Liquids for CO<sub>2</sub>
Utilization
作者:Jeehye Byun、Kai A. I. Zhang
DOI:10.1002/cctc.201801086
日期:2018.10.23
ILs. Herein, we optimize the molecular structure of imidazolium ILs to mediate the cycloaddition of CO2 upon epoxides, in which the IL functions as a homogeneous catalyst but exhibits heterogeneous separation capability. By varying the length of alkyl substituent on the imidazolium ring, the conversion efficiency of the epoxide into cycliccarbonate could be accelerated owing to higher reactivity of
Binding Studies on CB[6] with a Series of 1-Alkyl-3-methylimidazolium Ionic Liquids in an Aqueous System
作者:Nan Zhao、Li Liu、Frank Biedermann、Oren A. Scherman
DOI:10.1002/asia.200900510
日期:2010.3.1
The host–guest chemistry between a series of 1‐alkyl‐3‐methyl‐imidazolium bromide ([Cnmim]Br) guests and the macrocyclic host molecule cucurbit[6]uril (CB[6]) in an aqueous system is systematically studied in neutral aqueous media. Both 1D and 2D NMR experiments in conjunction with isothermal titration calorimetry (ITC) unveil the binding characteristics of the host–guest interaction. Solution binding
系统地研究了一系列1-烷基-3-甲基咪唑鎓溴化物([C n mim] Br)客体与大环主体分子葫芦[6]尿素(CB [6])之间的主客体化学反应在中性水性介质中进行了研究。1D和2D NMR实验与等温滴定量热(ITC)一起揭示了宿主-客体相互作用的结合特征。直接测量至多10 5 M -1的溶液结合常数(K a)。此外,此[C n 发现mim] Br–CB [6]相互作用可显着增加CB [6]在中性水中的溶解度,在某些情况下至少增加四个数量级。通过这些研究,已经构建了详细的主机与访客绑定模型,并进行了充分讨论。在该模型中,咪唑鎓环上的离域正电荷在与CB络合后部分地局限在任一氮原子上[6]。正电荷的位置与咪唑鎓环上“ 1-烷基”链的长度直接相关,这会引起诱导的局部偶极子,随后允许离子-偶极子与CB的羰基门户相互作用[6]。