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Synthesis, texture, and photoluminescence of lanthanide-containing chitosan-silica hybrids

Liu, Fengyi and Carlos, Luis D. and Ferreira, Rute A.S. and Rocha, João and Ferro, Marta C. and Tourrette, Audrey and Quignard, Françoise and Robitzer, Mike Synthesis, texture, and photoluminescence of lanthanide-containing chitosan-silica hybrids. (2010) The Journal of Physical Chemistry B, vol. 114 (n° 1). pp. 77-83. ISSN 1089-5647

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Official URL: http://dx.doi.org/10.1021/jp908563d

Abstract

Three different types of photoluminescent hybrid materials containing trivalent lanthanide (Ln3+ ) Eu3+, Tb3+) ions, chitosan, and silica have been prepared with different structural features. The different silica sources lead to diverse microstructures of hybrid materials, with silica being homogeneously dispersed in the chitosan materials (LnChS-H), or forming a core-shell morphology. Postsynthesis treatment is necessary for embedding the luminescent probe. The Ln3+-based materials have been investigated by photoluminescence spectroscopy (12-300 K). The chitosan-Eu3+-related local environment is maintained in the EuChS-H hybrid material. The emission features of the core-shell materials are characterized by the presence of two Eu3+ distinct local environments, one associated with the chitosan core and the other with the silica shell.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Other partners > Université de Montpellier 2 (FRANCE)
Other partners > Universidade de Aveiro (PORTUGAL)
Laboratory name:
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Deposited By: Leila Abdelouhab
Deposited On:22 Apr 2011 06:26

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