Abstract
The influence of the anionic and cationic parts on the nonlocal nonlinearity of ionic liquids was investigated using the Z-scan technique. The tetrafluoroborate (BF4−), hexafluorophosphate (PF6−) or bis (trifluoromethylsulfonyl)imide (Tf2N−) were employed as anionic parts, while the cationic part was composed by five different derivatives of imidazolium (CnMI, with n=4, 6, 8, 10 and 12). The thermal diffusivity, nonlinear refractive indexes of thermal origin, heat capacity, thermo-optical coefficients and degree of nonlocality were obtained. Our results indicate that ionic liquids can be exploited as nonlinear media with large nonlocal character.
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