Fig. 1: Frequencies of the AAD free OH bands from spectra of (H2O)n and M(H2O)n.
From: Can electric fields drive chemistry for an aqueous microdroplet?

Here we compared experiments and theory for M = Ca2+, Na+, I− and Cl− as a function of n−2/3, which is proportional to 1/r2 where r is the droplet radius. A Experimental results from IRPD spectroscopy; adapted with permission from the Royal Society of Chemistry46. B Results using the ReaxFF/CGeM force field.