“…Figure shows sets of computationally derived subcomponents of S ( q ), specifically the “charge trio” head–head ( S H–H ( q )), anion–anion ( S A–A ( q )), and head–anion ( S H–A ( q )) with species defined in Figure ; for a description of the many ways one can partition the total S ( q ) of ILs into subcomponents, see refs ,− ,,,,− and citations therein. The charge trio subcomponents of S ( q ) are particularly important because at about 0.8 Å –1 they carry information about the structure of the charge network (
and
correlations). ,− ,,,,− In the region 1–1.8 Å –1 , only one of these three subcomponents, namely, S H–A ( q ), is most relevant as it provides direct information about the very important adjacency correlations associated with positive and negative
interactions along the charge network. S H–H ( q ) and S A–A ( q ) are less important in the q-regime associated with adjacency correlations because, except for intramolecular interactions, species with identical charge are not expected to be adjacent.…”