Structural factors controlling thermal stability of imidazolium ionic liquids with 1- n -butyl-3-methylimidazolium cation on γ-Al 2 O 3

A model to predict maximum tolerable temperatures of metal-oxide-supported 1- n -butyl-3-methylimidazolium based ionic liquids

“…1, there is a strong correlation between C2H stretching frequency (ν(C2H)) and the thermal stability limits of bulk ILs, which are inversely related to the hydrogen-bond interaction energies (E HB ) (Claudio et al, 2014). In the aspects of ν(C2H) in (Akçay et al, 2014). Thus, our data suggested that the bulk ILs become thermally more stable as inter-ionic interaction strength decreases as shown in Fig.…”

“…As illustrated in our previous study (Akçay et al, 2014), given in Fig. 1, there is a strong correlation between C2H stretching frequency (ν(C2H)) and the thermal stability limits of bulk ILs, which are inversely related to the hydrogen-bond interaction energies (E HB ) (Claudio et al, 2014).…”

“…Thus, we infer that the artifacts of TGA are less pronounced on these metal-oxide supported samples. Since slow heating rates promote evaporation over thermal decomposition (Heym et al, 2010), we preferred the heating rate of 10 1C/min to characterize the dynamic structural dependency, which otherwise would not be possible to distinguish by isothermal TGA or slow heating measurements (Akçay et al, 2014). Moreover, we also note that any detected mass losses result either from thermal decomposition of ILs or their evaporation from the metal-oxide in flowing gas (Heym et al, 2010(Heym et al, , 2011.…”

“…In either case, structural integrity of the IL/metal-oxide system is lost. Previously, we reported the dependency of thermal stability limits of [BMIM] þ -based bulk ILs on their corresponding anion structures (given in (Akçay et al, 2014).…”

An introduction to zwitterionic salts

“…Similar decomposition temperature ranges have been reported for 1-alkyl-3-methylimidazolium carboxylate ionic liquids. 10 Stability of carboxylate based ZWSs is, however, significantly lower. Melting points are lower than those for common inorganic salts, but higher than 100 °C.…”