Functional Groups that Terminate the Core Structure

3 Functional Groups that Terminate the Core Structure 

A systematic study [14] of the variation in transition temperature with phase type for the 4-halogenophenyl 4 -n-octyloxybiphe-nyl-4-carboxylates is shown in Fig. 13. This particular family of materials have smectic A phases that exist over very long temperature ranges. Smectic B phases are found to occur but they are all monotropic. Interestingly, when the ester group is replaced by 

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