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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Abstract
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 |
| URI: | http://umpir.ump.edu.my/id/eprint/7480 |
| Download Statistic: | View Download Statistics |
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