title: Physicochemical properties of glycine-based ionic liquid [QuatGly-OEt][EtOSO(3)] (2-Ethoxy-1-ethyl-1,1-dimethyl-2-oxoethanaminium ethyl sulfate) and its binary mixtures with poly(ethylene glycol) (M(w) = 200) at various temperatures.
abstract: This work includes specific basic characterization of synthesized glycine-based Ionic Liquid (IL) [QuatGly-OEt][EtOSO(3)] by NMR, elementary analysis and water content. Thermophysical properties such as density, ρ, viscosity, η, refractive index, n, and conductivity, κ, for the binary mixture of [QuatGly-OEt][EtOSO(3)] with poly(ethylene glycol) (PEG) [M(w) = 200] are measured over the whole composition range. The temperature dependence of density and dynamic viscosity for neat [QuatGly-OEt][EtOSO(3)] and its binary mixture can be described by an empirical polynomial equation and by the Vogel-Tammann-Fucher (VTF) equation, respectively. The thermal expansion coefficient of the ILs is ascertained using the experimental density results, and the excess volume expansivity is evaluated. The negative values of excess molar volume for the mixture indicate the ion-dipole interactions and packing between IL and PEG oligomer. The results of binary excess property (V(m) (E) ) and deviations (Δη, Δ(x)n, Δ(Ψ)n, Δ(x)R, and Δ(Ψ)R) are discussed in terms of molecular interactions and molecular structures in the binary mixture.
authors.affiliation: Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan. t718z@yahoo.com.tw
authors.forename: Tzi-Yi
authors.initials: TY
authors.lastname: Wu
authors.forename: Bor-Kuan
authors.initials: BK
authors.lastname: Chen
authors.forename: Lin
authors.initials: L
authors.lastname: Hao
authors.forename: Yuan-Chung
authors.initials: YC
authors.lastname: Lin
authors.forename: H Paul
authors.initials: HP
authors.lastname: Wang
authors.forename: Chung-Wen
authors.initials: CW
authors.lastname: Kuo
authors.forename: I-Wen
authors.initials: IW
authors.lastname: Sun
mesh_terms: D005998:Glycine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013696:Temperature; D014783:Viscosity
chemical_list: D052578:Ionic Liquids; D000644:Quaternary Ammonium Compounds; D011092:Polyethylene Glycols; D005998:Glycine