Free-standing microcrystals of a fluorescent organic dye: Preparation and spectroscopic study

Abyan, Mouhammad; Bîrlă, Liliana; Bertorelle, Franck; Rodrigues, Fernanda; Fery-Forgues, Suzanne

doi:https://doi.org/10.1155/IJP/2006/30937

International Journal of Photoenergy

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Volume 2006 | Article ID 030937 | https://doi.org/10.1155/IJP/2006/30937

Free-standing microcrystals of a fluorescent organic dye: Preparation and spectroscopic study

Mouhammad Abyan,¹Liliana Bîrlă,¹Franck Bertorelle,¹Fernanda Rodrigues,¹and Suzanne Fery-Forgues¹

Received25 Feb 2005

Accepted07 Jun 2005

Published13 Feb 2006

Abstract

Suspensions of microcrystals were obtained from an organic fluorescent dye, 4-n-octylamino-7-nitrobenz-2-oxa-1,3-diazole, by reprecipitation in water in the presence of various macromolecules: anionic or cationic PAMAM dendrimer, poly(acrylic acid, sodium salt), poly(acrylamide), and calf thymus DNA. The use of these additives allowed the size and shape of the microcrystals to be controlled. A study by UV/vis absorption and fluorescence spectroscopy revealed some common points, but also some interesting differences, in the optical behaviour of the five samples.

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Copyright

Copyright © 2006 Mouhammad Abyan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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