L-Dodecyl-3-methylimidazolium

It is generally known that the examined properties and phase behavior of ILs vary on cation and anion structures changing. Some typical trends will be presented in this chapter on the basis of the structural effect on the interactions between counterpart ions (see, for example Ref. 3, the spoon-shaped structure of the unit cell of the l-dodecyl-3-methylimidazolium hexafluoro-phosphate, [Ci2Cilm][PFg]), and between the IL and the solvent, or the coexisting compound. The structure of IL and its interaction with the environment is extremely important in applications in analytical chemistry [4]. 

Fig. 1 Diagrams depicting a a layer of a cubic sodium chloride crystal b a monoclinic 1,3-dimethylimidazolium chloride ionic-liquid crystal c two radial distribution functions (RDFs) in liquid l-dodecyl-3-methylimidazolium hexafluorophosphate. Anions and cations are depicted in red and blue. In the cases of b and c the blue circles represent the centroid of the imidazolium rings of the cations. The alternating sequences of red and blue circles in a and b as well as the two curves in phase opposition in c clearly indicate the existence and nature of the polar networks in ionic condensed phases...

Example l-Dodecyl-3-methylimidazolium bromide, l-dodecyl-3-methylimida-zolium hexafluorophosphate, l-hexadecyl-3-methyl-imidazolium chloride. 

Apart from [EMIM]+ cation, researchers have explored other imidazolium-based cations such as l-butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl) imide ([BDMIM]), l-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM]), and l-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C12MIM]) [627,628]. For example, Bettini et al. [628] investigated four ILs including [BMIM][NTf2], [Ci2MIM][NTf2], [EMIM][NTf2], and 1-butyl-l-methylpyrrolidinium... 

The EIS method can also be employed to reveal the properties of different electrolytes with the same electrode active material. Bettini et al. [55] reported the Nyquist impedance profiles of four different ILs (l-dodecyl-3-methylimidazolium... 

FIGURE 57 Structures of l-dodecyl-3-methylimidazolium Ci2mini (L39), N-dodecyl-/V-Ci2mpyr methylpyrrolidinium (L40), 1,3-dioctadecylurea (L41), /V-(2-hydroxy-4-atkoxybenzalde-hydeimmo)-2-benzamidoethanamides (habbe, L42), and azines (L43). 

Mudring, A.-V, Babai, A., Arenz, S., Giernoth, R., Binnemans, K., Driesen, K. and Nockemann, R, Strong luminescence of rare earth compounds in ionic liquids luminescent properties of lanthanide(III) iodides in the ionic liquid l-dodecyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, J. Alloys Compd. 418, 204-208 (2006). 

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