Rhodamine 6G Encapsuled Mesoporous Silica Channels |
| Journal |
Advances in Science and Technology (Volume 55) |
| Volume |
Smart Optics |
| Edited by |
Pietro VINCENZINI and Giancarlo RIGHINI |
| Pages |
62-67 |
| DOI |
10.4028/www.scientific.net/AST.55.62 |
| Online since |
September, 2008 |
| Authors |
Priscila Samara Saran, Marco Antonio Utrera Martines, Hermi Felinto de Brito, Gustavo Rocha de Castro, Younes Messaddeq, Sidney José Lima Ribeiro |
| Keywords |
Luminescence, Mesoporous Silica, Rhodamine, Template |
| Abstract |
We report the effect of solvent on the rhodamine 6G encapsuled into channels of
mesoporous silica, synthesized by two-step process that gives intermediary stable hybrid micelles.
Mesoporous materials have been obtained by the method that involves surfactant micelles (mainly
cationic) and inorganic precursor of the structure to be obtained. MSU-X type mesoporous silica
has been synthesized with polyethylene oxide surfactant as the directing-structure agent and
tetraethyl orthosilicate Si(OEt)4 as the silica source. The influence of the solvent on the
encapsulation of rhodamine dye was systematically explored, specially its influence on the
luminescence properties. Rhodamine 6G encapsuled into mesoporous silica channel was
characterized by UV-Vis and luminescence spectroscopies, scanning electron microscopy, small
angle x ray scattering and N2 sorption-desorption. The pore size and the solvent effects into
luminescence dye encapsuled into mesoporous silica channels are observed in the visible absorption
and emission spectra of rhodamine 6G. The intense photoluminescence band of rhodamine 6G dye
is in 500 to 600 nm region. The observed shift of the absorption and emission bands can be assigned
to the effect of the solvents dielectric constant and pore size of mesoporous silica. |
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