Reversible self-assembly of entrapped fluorescent gelators in polymerized styrene gel matrix: erasable thermal imaging via recreation of supramolecular architectures

Sampath, Srinivasan ; Babu, Palathingal A. ; Mahesh, Sankarapillai ; Ajayaghosh, Ayyappanpillai (2009) Reversible self-assembly of entrapped fluorescent gelators in polymerized styrene gel matrix: erasable thermal imaging via recreation of supramolecular architectures Journal of the American Chemical Society, 131 (42). pp. 15122-15123. ISSN 0002-7863

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja9072035

Related URL: http://dx.doi.org/10.1021/ja9072035

Abstract

The reversible shift of emission in fluorescent molecular gelators has been explored for the preparation of a composite polymer film useful for erasable thermal imaging and secret documentation. A gelation-assisted photopolymerization of styrene allowed the entrapment of the fluorescent gelator molecules within a polystyrene matrix with a weak green fluorescence, which upon heating above the Tg of the polymer resulted in high-contrast fluorescence images due to the strong blue fluorescence of the individual molecules. The blue emission from the disassembled oligo(p-phenylenevinylene) molecules (OPVs) could be reversed to the green emission of the self-assembled OPVs by exposing the polymer film to chloroform vapors. The thermally written images are visible only under UV light and cannot be photocopied. A solvent-vapor-controlled recreation of the self-assembly of a fluorescent organogelator within a polymer matrix and its application in erasable secret documentation has not been reported previously.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:369
Deposited On:21 Sep 2010 04:44
Last Modified:11 Jul 2012 08:26

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