Otro
Comparison among different pH values of Rhodamine B solution impregnated into mesoporous silica
Registro en:
Orbital: the Electronic Journal of Chemistry, v. 5, n. 1, p. 23-29, 2013.
1984-6428
ISSN1984-6428-2013-05-01-23-29.pdf
0278054122091940
7655169292768456
Autor
Jorge, Juliana
Castro, Gustavo Rocha de
Martines, Marco Antonio Utrera
Resumen
We studied the behavior of different pH values of Rhodamine B solution impregnated into pores of mesoporous silica, through structural characterization techniques, such as scanning electron microscopy and porosity measurements, and spectroscopic characterization techniques, such as infrared and luminescence spectroscopy; in order to applications in luminescence. Because, Rhodamine B is an interesting xanthene dye whose optical properties depend of many factors, dye concentration and pH values. MSU-4 type mesoporous silica has been synthesized with Tween 60 surfactant as directing-structure agent and tetraethyl orthosilicate (Si(OEt)4, TEOS) as silica source. The mesoporous structures doped with dyes are promissory materials for several applications, for example, optical sensors and biomarkers. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)