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Prediction of the thermodynamic properties of 1-alkyl-3-methylimidazolium lactate ionic liquids [C n mim][Lact] (n = 2, 3, 4, 5, and 6) by parachor

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Abstract

An ionic liquid (IL) based on lactate, 1-butyl-3-methylimidazolium lactate ([C4mim][Lact]), has been prepared and characterized by 1H nuclear magnetic resonance (NMR) spectroscopy and differential scanning calorimetry (DSC). Since the IL can form strong hydrogen bonds with water, trace water is a problematic impurity in the IL. Using the standard addition method (SAM), the density, refractive index and surface tension of [C4mim][Lact] were measured in the temperature range (308.15 to 343.15 ± 0.05) K. On the basis of the experimental data, the parachor and molar volume for [C4mim][Lact], and the molecular volume V m, surface tension γ, molar enthalpy of vaporization Δl g H m 0, refractive index n D, and the thermal expansion coefficients α, for the homologues [C n mim][Lact] (n = 2, 3, 4, 5, and 6) were estimated using semi-empirical methods. The estimated values are in good agreement with the experimental data.

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Authors and Affiliations

  1. Institute of Rare and Scattered Elements Chemistry, Liaoning University, Shenyang, 110036, China

    DaWei Fang & JiaZhen Yang

  2. College of Chemistry, Liaoning University, Shenyang, 110036, China

    Jing Tong, Wei Guan & Han Wang

  3. Key Laboratory of Rare and Scattered Elements, Liaoning Province, Shenyang, 110036, China

    DaWei Fang & JiaZhen Yang

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  1. DaWei Fang
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  2. Jing Tong
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  3. Wei Guan
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  4. Han Wang
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  5. JiaZhen Yang
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Correspondence to JiaZhen Yang.

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Fang, D., Tong, J., Guan, W. et al. Prediction of the thermodynamic properties of 1-alkyl-3-methylimidazolium lactate ionic liquids [C n mim][Lact] (n = 2, 3, 4, 5, and 6) by parachor. Sci. China Chem. 53, 2564–2570 (2010). https://doi.org/10.1007/s11426-010-4161-2

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