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LIQUID CRYSTALS TRANSITION TEMPERATURE OF 4-N-ALKOXY-2,3,5,6- TETRAMETHYLPHENYL-4 –NITROAZOBENZENE

The liquid crystal transition temperatures of the homologous series of 4-ny-alkoxy 2,3,5,6-tetramethyl phenenyl-4'-nitroazobenzenes, where n:2-B were studied. It was found that the crystal phase (Cr) changed to the smectic phase (S) and with increasing temperature the late phase hanged to the isotropic liquid phase (l). The classification of these different modification was done by the texture observations of the substance with the aid of hot stage polarizing microscope. The conductivity of these mesogens were measured, and it was found to be increased with increasingnumber of carbon atoms in the terminal alkyl group.



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Keywords: Liquid Crystals , isotropic liquid phase , The conductivity of these mesogens , smectic phase , discotic phase.

ISSN: 2320-5407

EISSN: 2320-5407

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