Thermodynamics, Structure, and Dynamics in Room Temperature Ionic Liquids: The Case of 1-Butyl-3-methyl Imidazolium Hexafluorophosphate ([bmim][PF6])

• DOI: 10.1021/jp062895t
• Publication Date: 2006-09-22T10:10:41Z
• Authors: Alessandro Triolo; Andrea Mandanici; Olga Russina; Virginia Rodrigue...; Maria Cutroni; Christopher Hardacre; Mark Nieuwenhuyzen; Hans-Jurgen Bleif; Lukas Keller; Miguel Angel Ramos
• Keywords: Hexafluorophosphate

A detailed investigation of the phase diagram 1-butyl-3-methyl imidazolium hexafluorophosphate ([bmim][PF(6)]) is presented on basis a wide set experimental data accessing thermodynamic, structural, and dynamical properties this important room temperature ionic liquid (RTIL). The combination quasi adiabatic, continuous calorimetry, angle neutron X-ray diffraction, elastic scattering allows exploration many novel features material. Thermodynamic microscopic structural information derived both glassy crystalline states compared with results that recently appeared in literature allowing direct to be obtained existence two phases were not previously characterized confirming view RTILs show substantial degree order (even their amorphous states), which resembles order. We highlight strong connection between structure dynamics, showing three ranges state across spatial correlation dynamics change. complex polymorphism [bmim][PF(6)] also investigated; we compare our findings corresponding for similar RTILs. These provide further study longer alkyl chain salts.