Molecular fluorescence in silica particles doped with quercetin-Al3+ complexes

Journal of the Brazilian Chemical Society

Rafael Frederice¹  Ana Paula Garcia Ferreira¹  Marcelo Henrique Gehlen¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos São Carlos SP ,Brazil

关键词: silica particles;    fluorescence spectroscopy;    probes;    flavonoid;   

DOI  :  10.1590/S0103-50532010000700008

来源: SciELO

【 摘 要 】

Silica particles doped with quercetin-Al3+ complex were prepared by hydrolysis and condensation of tetraethylorthosilicate (TEOS) using acid and basic catalysis. The acid catalysis resulted in particles with diameter about 200 nm. Basic catalysis with TEOS was performed over a quercetin doped alumina-sol used as a core precursor, and fluorescent finger-shaped SiO2 particles were obtained. The quercetin-alumina-SiO2 fluorescence decays are biexponential, and this character is ascribed to two types of quercetin-Al3+ complexes entrapped in the core of the system.

【 授权许可】

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