Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6131
Title: Synthesis and characterization of naphthalene-based banana-shaped liquid crystals for photoswitching properties
Authors: Rahman, Md Lutfor
Yusoff, Mashitah Mohd
Srinivasa, H.T.
Kumar, Sandeep
+3 Co-authors
Keywords: Azobenzene
Isomerisation
Photoswitching
Optical image storage
Issue Date: May-2014
Publisher: Wiley-VCH Verlag
Citation: Journal of the Chinese Chemical Society, 2014, Vol. 61, p571-577
Abstract: A series of banana-shaped monomers containing naphthalene as central units, azobenzene in side arms with terminal alkenes were synthesized and characterized. Polarizing optical microscopy, DSC and X-ray diffraction measurements reveal that one compound processes a nematic phase while other four compounds exhibit B6 phase. The absorption spectrum of trans-azobenzene displays high-intensity π-π* transition at 365 and low-intensity n-π* transition at 450 nm. These molecules exhibit strong photoisomerisation behaviour in solutions in which trans to cis isomerisation takes 55 seconds whereas reverse process takes about 32 hours. Such a long thermal back relaxation is useful for creation of optical image storage devices.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/6131
ISSN: 2192-6549
Alternative Location: http://dx.doi.org/10.1002/jccs.201300191
Copyright: 2014 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany
Appears in Collections:Research Papers (SCM)

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