L-Hexadecyl-3-methylimidazolium chloride

The concept of the dual templating method was further extended by Zhou et al. [131], who introduced amphiphilic ionic liquids (AILs) as structuredirecting agents. The use of l-hexadecyl-3-methylimidazolium chloride as AIL provides the following advantages. It structures the silica walls around the macropores of the inverse opal in a highly ordered, microporous lamellar fashion. The interlayer periodicity of the lamellae is about 2.7 nm, with ca. 

Using sol-gel synthesis again, it is possible to employ these oriented phases for material synthesis, in the special case using l-hexadecyl-3-methylimidazolium chloride, 1 u. The condensation products of these oriented phases give quite perfect textures, as shown in Fig. 6.3-3 for a silica made from a lamellar amphiphilic IL mesophase [42]. 

Zhang, G. D. Chen, X. A. Xie, Y. Z. Zhao, Y. R. Qiu, H. Y. (2007). Lyotropic liquid crystalline phases in a ternary system of l-hexadecyl-3-methylimidazolium chloride/l-decanol/ water.. Colloid Interface Set, 315,601-606. 

The incorporation of imidazolium chloride salts between clay layers drastically increased their initial decomposition temperature, whereas no significant improvement was observed in the thermal stability of the intercalated tetrafluoroborate and hexafluorophosphate salts [64]. Apparently this effect was connected with the removal of the anion and depended on its nucleophilicity. Gilman and co-workers reported that the replacement of sodium in natural MMT by l-alkyl-2,3-dimethylimidazolium salts yielded organophilic MMT with a 100 °C improvement in thermal stability (in N2) as compared to the alkylammonium-treated MMT [66]. In Langat et al. s work the initial temperature of decomposition for clays modified with l-hexadecyl-3-(10-hydroxydecyl)-2-methylimidazolium and l-hexadecyl-2-methylimidazolium chloride was also very high - around 370 °C [67]. 

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

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