Synthesis of Banana-Shaped Liquid Crystals for Photoswitching Properties

Synthesis of Banana-Shaped Liquid Crystals for Photoswitching Properties

Three banana-shaped monomers containing naphthalene as central units and azobenzene in side arms with terminal alkenes were synthesized and characterized. DSC, polarizing optical microscopy, and X-ray diffraction measurements prove that all compounds exhibit B6 phase. The trans-azobenzene showed hig...

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Bibliographic Details
Main Authors: Lutfor, M. R., M. M., Yusoff, Hegde, Gurumurthy, Muhammad Nor Fazli, Abd Malek, Nurlin, Abu Samah, H. T., Srinivasa
Format: Article
Language:English
Published: Taylor & Francis 2013
Subjects:
Q Science (General)
Online Access:http://umpir.ump.edu.my/id/eprint/7480/1/Synthesis_of_Banana-Shaped_Liquid_Crystals_for_Photoswitching_Properties.pdf
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Summary:Three banana-shaped monomers containing naphthalene as central units and azobenzene in side arms with terminal alkenes were synthesized and characterized. DSC, polarizing optical microscopy, and X-ray diffraction measurements prove that all compounds exhibit B6 phase. The trans-azobenzene showed high-intensity π–π∗ transition at about 365 nm and low-intensity n–π∗ transition at about 450 nm. The strong hotoisomerizationbehavior in solutions of the molecules displayed that trans to cis isomerization takes 45 sec whereas reverse process takes about 28 h and 30 min. This long thermal back relaxation is useful for creation of optical image storage.

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