Photochromic Properties of New Benzoindene‐Fused 2H‐Chromenes |
| |
| Authors: | Cristina&#x;I Martins Paulo&#x;J Coelho Luis&#x;M Carvalho Ana&#x;M&#x;F Oliveira‐Campos Andr Samat Robert Guglielmetti |
| |
| Institution: | Cristina?I. Martins,Paulo?J. Coelho,Luis?M. Carvalho,Ana?M.?F. Oliveira‐Campos,André Samat,Robert Guglielmetti |
| |
| 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 2H‐chromenes (2H‐1]benzopyrans), compounds 10 and 12 exhibit a significant bathochromic shift of maximum‐absorption wavelength, an increase in the colorability, and similar fading rates. |
| |
| Keywords: | |
|
|
