Enhancement of the color intensity of photochromic fused-naphthopyrans
| Autor: | Jérôme Berthet, Paulo J. Coelho, Céu M. Sousa, Stéphanie Delbaere |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Process Chemistry and Technology General Chemical Engineering Doping Color intensity Polymeric matrix 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Photochromism Colored Irradiation 0210 nano-technology |
| Zdroj: | Dyes and Pigments. 169:118-124 |
| ISSN: | 0143-7208 |
| Popis: | A short synthesis of a polycyclic photochromic fused-naphthopyran is described. Unlike common photochromic naphthopyrans, under UV irradiation a single colored photoisomer is produced which returns to the uncolored state, in the dark, much faster than the parent unfused naphthopyran. An uncolored polymeric film doped with this dye can be activated in 30 s with UV light and loses 90% of the coloration in 1 min, in the dark. The residual coloration observed in the thermal fading of the colored species, dispersed in the polymeric matrix, was reduced to 5% using this new photochromic fused-naphthopyran. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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