Apparent and Transfer Molar Volumes for Aqueous Solution Containing Polyethylene Glycols and Amino Acid Ionic Liquids at 298.15 K

作者：Shinde Sandeep P; Dagade Dilip H^*

来源：Journal of Solution Chemistry, 2018, 47(6): 1060-1078.

DOI：10.1007/s10953-018-0780-6

• Amino acid ionic liquids
• Polyethylene glycol
• Transfer apparent molar volume
• Hydrophobic and hydrophilic interactions

The densities of 1-n-butyl-3-methylimidazolium ([Bmim]) based amino acid ionic liquids (AAILs) prepared from glycine [Gly], alanine [Ala], and valine [Val], namely [Bmim][Gly], [Bmim][Ala] and [Bmim][Val], in aqueous similar to 0.2 mol center dot kg(-1) polyethylene glycol (PEG400, PEG600 or PEG1000) and PEG400 solutions containing similar to (0.0946, 0.1891 and 0.3820) mol center dot kg(-1) of [Bmim][Gly], have been determined at 298.15 K. The experimental densities were used to evaluate the apparent molar volumes in the mixed solvent system and further used to obtain transfer molar volumes of AAILs for their transfer from water to aqueous PEG solutions and of PEG400 for its transfer from water to aqueous solutions containing (0.0946, 0.1891 and 0.3820) mol center dot kg(-1) of [Bmim][Gly]. The transfer molar volumes of AAILs and of PEG400 are found to be negative. The effects of alkyl chain-length variation on the anion of AAILs as well as the chain-length of PEG on transfer molar volumes are investigated and discussed in terms of hydrophobic-hydrophilic, hydrophobic-hydrophobic, and ion-hydrophobic interactions.

• 出版日期2018-6