[EMIM][TFSI]@CuBTC also occurs when loading different IL species into CuBTC, strong overlap with thermal decomposition would prevent its use as a practical PCM. Obviously, IL and MOF chemistries both influence the kinetics of IL@MOF composite interactions, from ordering transitions to melting. In this work we demonstrate that IL interactions with the internal surface of MOF crystals can be used to trigger reversible ordering transitions in such a way that they decouple from thermal decomposition. In the current case, this enables quasi-solid latent heat storage on the order of 10 4 J/kg.