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Probing the Polarity of Sol-Gels and Ormosils via the Absorption of Nile Red

Lobnik, Aleksandra ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 06 Jun 2011 12:25


Abstract

Conventional sol-gels are rather hydrophilic. A more hydrophobic material is obtained preparing organically modified siloxanes (ormosils). The polarity-sensitive probe Nile Red (NR) was doped in various sol-gels to probe their micro-polarity. The experiments show that the NR is an excellent probe and sensitive to the polarity of its microenvironment. Spectroscopic studies reveal remarkable ...

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