Twin mesogen

Note 2 A liquid-erystal dimer or mesogenic dimer is sometimes known as a twin mesogen. Use of the terms dimesogenic compounds and Siamese-twin mesogen for liquid-crystal dimer or mesogenic dimer is not recommended. 

Fig. 3 Molecular structure of a rod-coil-rod twin mesogenic molecule containing an oligo(ethylene oxide) moiety, and its self-organized structure...

Hydrogen bonding between carboxylic acid and pyridine has been widely applied for the formation of a variety of mesogenic structures [43-54]. Components of dicarboxylic acid have been used for the complexation [43-45]. A twin mesogenic structure shows an odd-even effect on transition... 

H. Dehne, A. Roger, D. Demus, S. Diele, H. Ktesse, G. Pelzl, W. Weissflog, Sulphur ligated Siamese twin mesogens. Liq. Cryst. 6, 47-62 (1989)... 

Molecules of liquid crystals can be built from a variety of structural elements. For instance, in 1927 Vorlander synthesized the first liquid crystal twins, now called tail-to-tail twins. A Siamese twin mesogen is a compound in which two independently mesogenic parts are joined in a single molecule. While earlier twins were ligated by carbon-containing groups such as methylene, Dehne et aV have shown that sulfur, sulfinyl or sulfonyl groups can perform a similar role. Anatomy of MLCs from the point of view of possible structures was reviewed in detail by Demus. ... 

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