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Density, refractive index, and viscosity of binary systems composed of ionic liquids ([C n mim]Cl, n = 2, 4) and three dipolar aprotic solvents at T = 288.15–318.15 K

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Abstract

Thermophysical properties, such as density (ρ), refractive index (nD), and viscosity (η) of the binary systems of ionic liquids (ILs) [C n mim]Cl (C n mim = 1-alkyl-3-methylimidazolium; n = 2, 4) and three dipolar aprotic solvents (NMP (N-methyl-2-pyrrolidinone), DMI (1,3-dimethyl-2-imidazolidinone), and DMPU (1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone)) were measured based on the solubility of ILs in the molecular solvents at temperatures from 288.15 K to 318.15 K and the pressure of p = 0.1 MPa. Moreover, intermolecular interactions, such as weak hydrogen bonding and Coulomb forces, were discussed based on the determined properties.

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Abbreviations

Ai:

cubic equation parameters

N:

the number of experimental points

n:

the number of carbon atoms

n D :

refractive index

p:

pressure Pa

RSD:

Relative standard deviation %

T:

temperature K, °C

xi:

the molar fraction of component i

x̄:

mean value

Y:

variable

ε:

dielectric constant

η:

viscosity mPa s

μ:

dipole moment D

ρ:

density g cm−3

σ:

standard deviation

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi, 710062, China

    Lu Bai, Shu-Ni Li, Quan-Guo Zhai, Yu-Cheng Jiang & Man-Cheng Hu

  2. Key Laboratory of Macromolecular Science of Shaanxi Province, Xi’an Shaanxi, 710062, China

    Shu-Ni Li, Quan-Guo Zhai, Yu-Cheng Jiang & Man-Cheng Hu

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  1. Lu Bai
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  2. Shu-Ni Li
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  3. Quan-Guo Zhai
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Correspondence to Shu-Ni Li.

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Bai, L., Li, SN., Zhai, QG. et al. Density, refractive index, and viscosity of binary systems composed of ionic liquids ([C n mim]Cl, n = 2, 4) and three dipolar aprotic solvents at T = 288.15–318.15 K. Chem. Pap. 69, 1378–1388 (2015). https://doi.org/10.1515/chempap-2015-0139

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