Optical and diffractive studies of pyridinium-based ionic liquids

Electronic absorption, steady-state fluorescence spectra and X-ray diffraction patterns for several pyridinium-based ionic liquids (ILs) (1-butyl-3-methylpyridinium tetrafluoroborate, 1-butyl-4-methylpyridinium tetrafluoroborate, 1-octyl-3-methylpyridinium tetrafluoroborate and 1-butyl-3-methylpyridinium dicyanamide) have been obtained. A systematic study has been performed for different ILs in terms of structural characteristics obtaining remarkable results. The present characterisation, centre of attention in theoretical and practical fields, leads to understand the complex behaviour of such compounds and is an essential step for their potential development as new solvents in extended applications.