TY - JOUR

T1 - Measurement of the osmotic coefficients in aqueous solutions of imidazolium ionic liquids ([Cnmim]Cl or [Cnmim]Br, n = 4, 6, 8) over a wide salinity range at 298.15 K

AU - Корчак, Петр Андреевич

AU - Сафонова, Евгения Алексеевна

AU - Викторов, Алексей Исмаилович

PY - 2023/8/19

Y1 - 2023/8/19

N2 - The goal of this work is to provide accurate and detailed experimental data on the osmotic coefficients and the activity of water for the binary aqueous solutions of ionic liquids [Cnmim]Cl and [Cnmim]Br (n = 4, 6, and 8), covering the broad range of salinity up to 10 mol·kg-1. Such data form the basis for the thermodynamic description of the system, and are needed, in particular, for the estimation of parameters of thermodynamic models. Our data supplement and extend to a broader concentration range the existing literature data on the studied systems at 298.15 K. The systematic presentation of the data includes the method used, the conditions, the concentration range, and the estimates of the experimental errors. To help in the assessment of the data quality, we compare all of the available data sets. Using vapor pressure osmometry and isopiestic methods to perform experiments, we discuss possible sources of error and explain in every detail the construction of the apparatus designed in our lab to reduce the experimental errors to a minimum. For [C8mim]Cl and [C8mim]Br, known to form micelles in aqueous solutions, we estimate the critical micelle concentration from our experimental data on the osmotic coefficients and the activity of water.

AB - The goal of this work is to provide accurate and detailed experimental data on the osmotic coefficients and the activity of water for the binary aqueous solutions of ionic liquids [Cnmim]Cl and [Cnmim]Br (n = 4, 6, and 8), covering the broad range of salinity up to 10 mol·kg-1. Such data form the basis for the thermodynamic description of the system, and are needed, in particular, for the estimation of parameters of thermodynamic models. Our data supplement and extend to a broader concentration range the existing literature data on the studied systems at 298.15 K. The systematic presentation of the data includes the method used, the conditions, the concentration range, and the estimates of the experimental errors. To help in the assessment of the data quality, we compare all of the available data sets. Using vapor pressure osmometry and isopiestic methods to perform experiments, we discuss possible sources of error and explain in every detail the construction of the apparatus designed in our lab to reduce the experimental errors to a minimum. For [C8mim]Cl and [C8mim]Br, known to form micelles in aqueous solutions, we estimate the critical micelle concentration from our experimental data on the osmotic coefficients and the activity of water.

UR - https://www.mendeley.com/catalogue/fbb95203-de20-37ad-9ab4-bc118d58d334/

U2 - 10.1021/acs.jced.3c00348

DO - 10.1021/acs.jced.3c00348

M3 - Article

JO - Journal of Chemical & Engineering Data

JF - Journal of Chemical & Engineering Data

SN - 0021-9568

ER -