Photochromism of indolino-benzopyrans studied by NMR and UV-visible spectroscopy


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 (lambda(max) of colored form, colorability, and rate constant of bleaching) obtained by UV-visible spectroscopy are reported. Copyright (C) 2006 S. Delbaere et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.



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Chemistry; Energy & Fuels; Optics; Physics


Delbaere, S; Berthet, J; Salvador, MA; Vermeersch, G; Oliveira, MM

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