title: Gamma radiolysis of ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate.
abstract: The applications of room-temperature ionic liquids in the nuclear fuel cycle and radiation chemistry depend on a comprehensive knowledge of their stability and chemical properties under radiation conditions. In this work, the effect of gamma radiation on pure ionic liquid [bmim][PF6] was investigated in detail. The radiolysis of [bmim][PF6] leads to an increase of UV-vis absorbance and a decrease of fluorescence intensity with increasing radiation dose. Raman spectra proved that gamma radiation induced significant chemical scission of the n-butyl group (e.g. C-H and C-C scission) and damage to the [PF6]- anion. When the irradiated [bmim][PF6] samples were cooled, two crystal structures were found to coexist, and they suffered a continuous destruction under irradiation; their dose dependence, however, was different.
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Mingying
authors.initials: M
authors.lastname: Qi
authors.forename: Guozhong
authors.initials: G
authors.lastname: Wu
authors.forename: Shimou
authors.initials: S
authors.lastname: Chen
authors.forename: Yaodong
authors.initials: Y
authors.lastname: Liu
mesh_terms: D002152:Calorimetry, Differential Scanning; D003116:Color; D005720:Gamma Rays; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry* / Q000528:radiation effects*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D044367:Phase Transition; D013053:Spectrophotometry; D013816:Thermodynamics; D044366:Transition Temperature
chemical_list: C412621:1-butyl-3-methylimidazolium hexafluorophosphate; D007093:Imidazoles; D052578:Ionic Liquids