Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/1216
Title: Reversible self-assembly of entrapped fluorescent gelators in polymerized styrene gel matrix: Erasable thermal imaging via recreation of supramolecular architectures
Authors: Srinivasan, S
Babu, P A
Mahesh, S
Ajayaghosh, A
Keywords: Pi-Conjugated systems
Organic nanoparticles
Issue Date: 2009
Publisher: American Chemical Society
Citation: Journal of the American Chemical Society 131(42):15122-15123;28 Oct 2009
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 T. 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-control led 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.
ISSN: 0002-7863
Appears in Collections:2009

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