ILPC: simple chemometric tool supporting the design of ionic liquids

Area of Science:

• Chemistry
• Materials Science

Background:

• Ionic liquids (ILs) offer diverse applications, with properties tunable by ion selection.
• Designing ILs with specific properties requires understanding ion-property relationships, a complex task.
• Current methods for IL design necessitate efficient, cost-effective tools for property prediction prior to synthesis.

Purpose of the Study:

• To develop a rapid, cost-effective method for predicting key physicochemical properties of ionic liquids.
• To enable the pre-synthesis design of ionic liquids with targeted specifications.
• To simplify the ionic liquid design process by reducing reliance on experimental screening.

Main Methods:

• Development of the Ionic Liquid PhysicoChemical predictor (ILPC) tool.
• Utilizing Principal Component Analysis (PCA) on a dataset of 172 ILs.
• Analyzing molecular formulas to correlate with physicochemical properties.

Main Results:

• ILPC enables simultaneous qualitative prediction of viscosity, n-octanol-water partition coefficient, solubility, and enthalpy of fusion.
• PCA revealed distribution trends for these properties based on IL structures.
• Molecular formulas alone provide sufficient information for predicting these four key properties.

Conclusions:

• The ILPC tool facilitates rapid, pre-synthesis screening of ionic liquids, bypassing experimental steps.
• It aids in designing ILs with desired properties by leveraging information from molecular formulas.
• The influence of constituent ions on viscosity, partition coefficient, solubility, and enthalpy of fusion follows an additive trend.