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Photochromic Properties of New Benzoindene-Fused 2H-Chromenes

✍ Scribed by Cristina I. Martins; Paulo J. Coelho; Luis M. Carvalho; Ana M. F. Oliveira-Campos; André Samat; Robert Guglielmetti

Publisher
John Wiley and Sons
Year
2003
Tongue
German
Weight
144 KB
Volume
86
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The synthesis and the photochromic properties of new photochromic 6,7‐ and 7,8‐benzoindene annellated benzopyrans are described. When compared to parent indeno‐fused 2__H__‐chromenes (2__H__‐[1]benzopyrans), compounds 10 and 12 exhibit a significant bathochromic shift of maximum‐absorption wavelength, an increase in the colorability, and similar fading rates.

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