%0 Journal Article %T Photochromism of indolino-benzopyrans studied by NMR and UV-visible spectroscopy %A S. Delbaere %A J. Berthet %A M. A. Salvador %A G. Vermeersch %A M. M. Oliveira %J International Journal of Photoenergy %D 2006 %I Hindawi Publishing Corporation %R 10.1155/ijp/2006/43213 %X The synthesis of photochromic 3,3-di(4′-fluorophenyl)-3H-benzopyrans fused to an indole moiety is described. The structures of photomerocyanines elucidated by NMR spectroscopy and spectrokinetic data (λmax⁡ of colored form, colorability, and rate constant of bleaching) obtained by UV-visible spectroscopy are reported. %U http://www.hindawi.com/journals/ijp/2006/043213/abs/