4. LI modeling

4.1 Are LIs designer solvents, and how can we model them?

As we saw in section 3, the "universal" properties of LIs are not legion, and can be summed up as being ionic, liquid and conductive, all of which derive directly from the definition of these solvents. As for the rest, it seems that you can find everything and its opposite in the world of LIs: flammable or not, volatile or not, for the most emblematic examples.

Thus, it seems to us that the structural diversity and, consequently, the variability of LI properties, impose two observations:

• there is probably an "ideal" LI for a given application, or one that corresponds exactly to a list of targeted physico-chemical properties;

• ...