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

Fengyi Liu (1, 2) , Luis D. Carlos (2) , Rute A. Sa Ferreira (2) , João Rocha (3) , Marta C. Ferro (4) , Audrey Tourrette (1) , Françoise Quignard (1) , Mike Robitzer (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 CICECO - Department of physics
3 CICECO - Department of Chemistry
4 CICECO - Department of Ceramics and Glass Engineering

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.

Mots clés: Photoluminescent; Hybrid materials; Postsynthesis treatment

Mots clés: Chitosan; Lanthanide ions; photoluminescent; silica

Domaines: Matériaux; Matériaux; Chimie de coordination

Fengyi Liu, Luis D. Carlos, Rute A. Sa Ferreira, João Rocha, Marta C. Ferro, et al.. Synthesis, texture, and photoluminescence of lanthanide-containing chitosan-silica hybrids. Journal of Physical Chemistry B, 2010, 114 (1), pp.77-83. ⟨10.1021/jp908563d⟩. ⟨hal-00451362⟩