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Title: Novel five-ring bent-core compounds exhibiting a transition from the electro-optically nonswitchable to a switchable B7 phase
Authors: Umadevi, S.
Sadashiva, B.K.
Issue Date: 6-Oct-2006
Publisher: American Chemical Society
Citation: Chemistry of Materials, 2006, Vol.18 p5186 -5192
Abstract: Two homologous series of achiral five-ring bent-core compounds derived from 2-cyano- or 2-nitro-resorcinol having terminal n-alkyl carboxylate groups have been synthesized and characterized. All the compounds investigated show enantiotropic mesophases. Interestingly, the compounds derived from 2-cyanoresorcinol display two mesophases and the higher temperature mesophase shows unusual electro-optical characteristics. In contrast, the nitro-substituted compounds exhibit only one mesophase, which switches electro-optically. This mesophase and the higher temperature phase exhibited by the cyano-substituted compounds show similar characteristics and have been shown to be the same. These observations are unusual but very interesting and represent the first example of a transition from the electro-optically nonswitchable B7X phase to a switchable B7FE phase.
Description: Restricted Access.
ISSN: 0897-4756
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Copyright: (2006) by American Chemical Society
Appears in Collections:Research Papers (SCM)

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