Synthesis of Banana-Shaped Liquid Crystals for Photoswitching Properties

Lutfor, M. R. and M. M., Yusoff and Hegde, Gurumurthy and Muhammad Nor Fazli, Abd Malek and Nurlin, Abu Samah and H. T., Srinivasa (2013) Synthesis of Banana-Shaped Liquid Crystals for Photoswitching Properties. Molecular Crystals and Liquid Crystals, 587. pp. 41-53. ISSN 1542-1406 (print); 1563-5287 (online). (Published)

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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.

Item Type: Article
Uncontrolled Keywords: Azobenzene; isomerization; naphthalene; optical image storage; photoswitching
Subjects: Q Science > Q Science (General)
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 17 Dec 2014 07:30
Last Modified: 07 Feb 2018 08:04
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