Enhancing Task Specific Ionic Liquids’ Thermal Stability by Structural Modification
摘要:
Thermal retro-Michael decomposition of task specific ionic liquids (TSILs) was efficiently suppressed by hydrogenation of the oxobutyl side chain yielding a hydroxyfunctionalized TSIL.
Is Amine a Stronger Base in Ionic Liquid Than in Common Molecular Solvent? An Accurate Basicity Scale of Amines
作者:Chong Mao、Zhen Wang、Pengju Ji、Jin-Pei Cheng
DOI:10.1021/acs.joc.5b01200
日期:2015.8.21
The equilibrium basicities of 21 frequently used amines in two room-temperature ionic liquids (RTILs) were measured precisely. The standard deviation was much superior to that sparsely reported elsewhere. The data comparisons revealed that amines are stronger bases in ionic ligquids than in DMSO and water but weaker base than in acetonitrile (AN). Interestingly, regression analyses demonstrate that
Inter- and Intramolecular Interactions in Imidazolium Protic Ionic Liquids
作者:Anastasia Maria Moschovi、Vassileios Dracopoulos、Vladimiros Nikolakis
DOI:10.1021/jp412352k
日期:2014.7.24
protic ionic liquids (PILs) HCnImNTf2 (n = 0–12) were studied using vibrational spectroscopy (FT-IR/ATR and FT-Raman) and differential scanning calorimetry (DSC). The effect of alkyl substituent length (n = 0–12) and temperature on the relative magnitude of the different interactions is elucidated. For short carbon alkyl chains (n < 3), the PIL structure is affected from intramolecular interaction caused
Effect of an Ionic Liquid Solvent on the Phase Behavior of Block Copolymers
作者:Justin M. Virgili、Megan L. Hoarfrost、Rachel A. Segalman
DOI:10.1021/ma902804e
日期:2010.6.22
The phasebehavior of concentrated mixtures of blockcopolymers with an ionic liquid has been studied using a large series of blockcopolymers with varying molecular weight and volume fraction to gain a thorough understanding of the thermodynamics of self-assembly. The lyotropic phasebehavior of mixtures of poly(styrene-block-2-vinylpyridine) (S2VP) copolymers with the ionic liquid imidazolium bi
r2GX-ray(r) - 1} for these ionic liquids. It was supposed that the NH · · · O hydrogenbond causes the cation–anion orientation variations. To obtain further insight into the hydrogenbond in the PIL, MD simulations performed and agreed well with the experiments. According to spatial distribution functions (SDF) for the three ionic liquids, the O atom of TFSA− prefers the NH hydrogen of the imidazolium that