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20 April 2006 Photoactive sol-gel biocoatings
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Proceedings Volume 6158, Lightmetry and Light and Optics in Biomedicine 2004; 61580U (2006)
Event: Lightmetry and Light and Optics in Biomedicine 2004, 2004, Warsaw, Poland
In this work we investigated the photoactive properties sol-gel biocoatings doped with Protoporphyrin IX (PP IX). It was demonstrated that PP IX entrapped in sol-gel preserves it's chemical activity and may have contact with the external environment. The chemical reactions with zinc cations and pyridine, as well as protonation, occurred quite fast. This indicates, that the interconnected porous network could be easily penetrated by relatively large molecules (e.g. mentioned by pyridine molecule). Further, we observed that PP IX molecules do not leave the pores. Structural changes caused by the addition of PP IX to the sol-gel matrix influence not only on the optical properties, but also on durability of the coatings. The altering of PP IX doped silica sol-gel coatings is quite slow.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Ulatowska-Jarża, U. Bindig, H. Podbielska, I. Hołowacz, I. Gersonde, J. Beuthan, G. Müller, and H. J. Eichler "Photoactive sol-gel biocoatings", Proc. SPIE 6158, Lightmetry and Light and Optics in Biomedicine 2004, 61580U (20 April 2006);

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