]TFSI, the polar/nonpolar nanodomains were not formed due to the flexible and curled alkyl chains. Despite no nanodomain, HP LLT occurred with changing the local structures. A series of quaternary ammonium and phosphonium ILs exhibited entirely different HP behavior, which implies that the ether bonds of the cations have an intrinsic property.
Abe et al. (Wed,) studied this question.