Influence of Sequence Structure in Chain

The cyano biphenyl molecules illustrate the effect of sequence structure on the abihty to form various phases. The cyano biphenyl molecules form a very important group of materials being widely used in many liquid crystal display appKcations. Two examples are as follows  

There are a number of factors working within this series of molecules. Firstly, a Sc phase appears at n = 4, the Sb and Se being also only observed for n = 3. The alkyl cyano biphenyl molecules, structure (8), all have the same absolute 

Value of n in ester chain Phase types observed on cooling 

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