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Issue 4, 2003
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Photochromic naphthopyrans in sol–gel ormosil coatings

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Abstract

The sol–gel method has been used to entrap photochromic naphthopyran molecules in ormosil coatings. The resulting films exhibited a rapid and reversible color change upon irradiation with UV light, leading to deeply colored coatings. The bleaching of the samples can be attained by both thermal and photo-induced processes. The photochromic properties of different naphthopyran derivatives in the sol–gel matrix were measured, such as the absorption spectra of bleached and colored states as well as the thermal and photoinduced decay kinetics.

Graphical abstract: Photochromic naphthopyrans in sol–gel ormosil coatings

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Article information


Submitted
28 Nov 2002
Accepted
05 Feb 2003
First published
25 Feb 2003

J. Mater. Chem., 2003,13, 727-730
Article type
Paper

Photochromic naphthopyrans in sol–gel ormosil coatings

M. Zayat and D. Levy, J. Mater. Chem., 2003, 13, 727 DOI: 10.1039/B211759B

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