Photophysical Properties of Dye-Doped Silica Nanoparticles Bearing Different Types of Dye−Silica Interactions

Photophysical properties of three types of dye-doped silica nanoparticles (NPs) with different dye−silica interactions have been investigated. In two cases the dye−silica interactions are noncovalent, where tris(2,2′-bipyridine)ruthenium(II) chloride (Rubpy) is attracted to the silica network electr...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2009-09, Vol.113 (36), p.15974-15981
Main Authors: Ma, Dongling, Kell, Arnold J, Tan, Sophie, Jakubek, Zygmunt J, Simard, Benoit
Format: Article
Language:English
Subjects:
C: Nanops and Nanostructures
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Summary:Photophysical properties of three types of dye-doped silica nanoparticles (NPs) with different dye−silica interactions have been investigated. In two cases the dye−silica interactions are noncovalent, where tris(2,2′-bipyridine)ruthenium(II) chloride (Rubpy) is attracted to the silica network electrostatically and tetramethylrhodamine-dextran (TMR-Dex) is trapped inside the silica matrix through spatial/steric hindrance. In the third case, tetramethylrhodamine-5-isothiocyanate (TRITC) modified with 3-aminopropyltriethoxysilane (APTES) to form TMR-APTES is bound to the silica matrix covalently. Although in all three types of architectures absorption, excitation, and emission spectra show only small red-shifts (
ISSN:1932-7447
1932-7455
DOI:10.1021/jp905812f