Pulse radiolysis study of ion-species effects on the solvated electron in alkylammonium ionic liquids

Pulse radiolysis studies of functionally substituted imidazolium-based ionic liquids

“…One important application of RTILs is as media for the processing of spent nuclear fuels [6,7]. It is therefore necessary to observe the characteristics of radiation chemistry in ionic liquids to understand the factors that control their stability under ionizing radiation, and to study the kinetics using pulse radiolysis methods [8][9][10][11]. The direct observation of solvated electrons in an ionic liquid was first reported for methyltributylammonium bis(trifluoromethylsulfonyl)imide; e − solv has a lifetime of 300 ns and a broad absorption spectrum that peaks at 1400 nm [12].…”

Decomposition of halophenols in room-temperature ionic liquids by ionizing radiation

“…The prepared samples were poured into 1-cm quartz cells and saturated with nitrogen. The experimental setup was the same as described previously in the literature (Asano et al, 2008;Yang et al, 2008;Kimura et al, 2008;Kondoh et al, 2009). The absorbed dose was estimated to be 110 Gy/pulse by using the extinction coefficient of (SCN) 2 À (e¼7600 dm 3 mol À 1 cm À 1 at 475 nm) in aqueous KSCN solution and the G-value of 2.7 for hydroxyl radicals (Bugaenko et al, 1996;Kojima et al, 2004).…”

“…In addition, reactions in RTILs involving charged reactive species, particularly solvated electrons, have been studied by the techniques of radiation chemistry (Katoh et al, 2007;Takahashi et al, 2008;Wishart and Neta, 2003;Wishart et al, 2005;Yang et al, 2008;Asano et al, 2008). The behavior of the solvated electrons in RTILs have also been observed, and the G-values (molecules per 100 eV absorbed energy) of the solvated electrons in RTILs have been determined with picosecond pulse radiolysis systems (Wishart and Neta, 2003;Asano et al, 2008;Kondoh et al, 2009). These results suggested that RTILs might be a suitable medium for radiation-induced reduction; however, the mechanism of the reaction between organic solutes and the solvated electrons has not yet been elucidated.…”

Cellulose gels produced in room temperature ionic liquids by ionizing radiation

“…Among these organic solutions, RTILs have attracted much attention in the diverse fields of chemistry, biology, engineering, and environmental science because of their unique functionalities such as specific solubility, chemical and thermal stabilities, unusual dynamical properties linked to high viscosity, and wide potential windows (Rogers, 2003). So far, several studies have been reported in the fields of photo-and radiation chemistry to identify more effective reactions between the charged reactive species in RTILs (Wishart et al, 2003;Wishart et al, 2005;Kondoh et al, 2009;Katoh et al, 2009;Kimura et al, 2010). In addition, extensive fundamental and applied research have been conducted on RTILs used in various fields such as radiation-induced polymerization (Qi et al, 2008) and radiation-induced grafting polymerization (Hao et al, 2009).…”