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FABRIZIO LO CELSO

Microscopic Structural and Dynamic Features in Triphilic Room Temperature Ionic Liquids

  • Authors: Lo Celso, Fabrizio; Appetecchi, Giovanni B; Simonetti, Elisabetta; Zhao, Man; Castner, Edward W; Keiderling, Uwe; Gontrani, Lorenzo; Triolo, Alessandro; Russina, Olga
  • Publication year: 2019
  • Type: Articolo in rivista (Articolo in rivista)
  • OA Link: http://hdl.handle.net/10447/356621

Abstract

Here we report a thorough investigation of the microscopic and mesoscopic structural organization in a series of triphilic fluorinated room temperature ionic liquids, namely [1-alkyl, 3-methylimidazolium][(trifluoromethanesulfonyl)(nonafluorobutylsulfonyl)imide], with alkyl=ethyl, butyl, octyl ([C(n)mim][IM14], n = 2, 4, 8), based on the synergic exploitation of X-ray and Neutron Scattering and Molecular Dynamics simulations. This study reveals the strong complementarity between X-ray/neutron scattering in detecting the complex segregated morphology in these systems at mesoscopic spatial scales. The use of MD simulations delivering a very good agreement with experimental data allows us to gain a robust understanding of the segregated morphology. The structural scenario is completed with determination of dynamic properties accessing the diffusive behavior and a relaxation map is provided for [C(2)mim][IM14] and [C(8)mim][IM14], highlighting their natures as fragile glass formers.