ISSN:
1662-0356
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Allgemeine Naturwissenschaft
,
Technik allgemein
Notizen:
We report the effect of solvent on the rhodamine 6G encapsuled into channels ofmesoporous silica, synthesized by two-step process that gives intermediary stable hybrid micelles.Mesoporous materials have been obtained by the method that involves surfactant micelles (mainlycationic) and inorganic precursor of the structure to be obtained. MSU-X type mesoporous silicahas been synthesized with polyethylene oxide surfactant as the directing-structure agent andtetraethyl orthosilicate Si(OEt)4 as the silica source. The influence of the solvent on theencapsulation of rhodamine dye was systematically explored, specially its influence on theluminescence properties. Rhodamine 6G encapsuled into mesoporous silica channel wascharacterized by UV-Vis and luminescence spectroscopies, scanning electron microscopy, smallangle x ray scattering and N2 sorption-desorption. The pore size and the solvent effects intoluminescence dye encapsuled into mesoporous silica channels are observed in the visible absorptionand emission spectra of rhodamine 6G. The intense photoluminescence band of rhodamine 6G dyeis in 500 to 600 nm region. The observed shift of the absorption and emission bands can be assignedto the effect of the solvents dielectric constant and pore size of mesoporous silica
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.55.62.pdf
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