Perfluoroalkyls intercalation compounds

Hybrid Intercalation Compounds Containing Perfluoroalkyl Groups... 

Table 15.2 Preparation and compositions of intercalation compounds containing perfluoroalkyl groups... 

Not many reports on the preparation of intercalation compounds containing perfluor-oalky groups have been provided. However, the other layered materials that are not shown in Table 15.2 and possess ion exchange capability or acidic hydroxyl groups are also expected to react with the reagents containing perfluoroalkyl groups in similar ways shown above. 

Hybrid Intercalation Compounds Containing Perfluoroalkyl Groups 475 15.2.2 Exfoliation and Film Preparation... 

Photophysical and Photochemical Properties of Dyes in Intercalation Compounds Containing Perfluoroalkyl Groups... 

Examples of rod-like molecules with a branched fluorinated chain at one end (compounds 90-93) are collated in Fig. 26 [166]. It is interesting that smectic phases are retained despite the significant size of these chains. This is mainly a result of the intercalation of the aromatic cores and aliphatic spacers of these molecules, which can compensate this steric distortion. These branched chains remove the B and E phases with crystalline layers and replace them by fluid smectic phases, including SmC phases. The comparison in this figure also shows that the bulky and flexible bis(perfluoropropylene oxide) derived chains (compounds 92, 93) can provide LC materials with especially low melting points and broad mesophase ranges due to the higher conformational flexibility of perfluoroethers compared to linear perfluoroalkyl chains [99, 176]. 

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