| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9605612 | Journal of Photochemistry and Photobiology A: Chemistry | 2005 | 8 Pages |
Abstract
Three new indeno-fused naphthopyrans were prepared and their photochromic behaviour was investigated. UV-vis continuous irradiation of indeno-fused 3H-naphtho[2,1-b]pyrans generates two photoisomers in variable relative amounts with very different thermal stabilities. While one isomer exhibits a fast thermal bleaching the other is thermally very stable and returns to the uncoloured form mainly through a photochemical process promoted by visible light irradiation.
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Authors
Paulo J. Coelho, Maria A. Salvador, M. Manuel Oliveira, Luis M. Carvalho,