Chapter 1 - Database of Ionic Liquids

Abstract

This chapter provides an overview on a comprehensive database of physical properties of pure ionic liquids, which has been collected from more than 100 dependable literature sources in the period from 1982 to June 2008. There are more than 8000 data points on the 29 kinds of physicochemical properties for 1789 available ionic liquids, from which 714 different cations and 189 different anions were extracted. The more than 7000 data points collected in the database are only derived from pure ionic liquids, and do not include binary mixture systems and ternary mixture systems containing ionic liquids and their thermodynamic and thermochemical properties, and also do not include the CAS registry numbers. Almost all kinds of important physicochemical properties are collected in this database. It covers 29 different physicochemical properties: melting temperature, glass transition temperature, crystallization temperature, decomposition temperature, freezing point, density, dynamic viscosity, kinematical viscosity, isobaric heat capacity, isentropic compressibility, isobaric expansibility, and saturated vapor pressure. The chemical name, the abbreviation, molecular formulae, molar mass, structure, and character are also presented in the database. There are comparatively abundant data available for 22 species of cations including imidazolium salts from monosubstituted to pentasubstituted compounds, triazolium, pyrrolidinium, piperidinium, pyrroline, pyridinium, isoquinolinium, thiazolium, and amino acid. 16 species anions such as halogen, containing boron, nitrogen, and metal are also presented in database. In accordance with the ionic liquid appearing sequence, the cations extracted from the reported ionic liquids are tabulated by a code, and the corresponding ID, abbreviation, name, formula, and molecular weight.