Photograph of the fluorescence of dye-loaded zeolite L layers upon monochromatic irradiation at 485 nm and observation through a 500-nm cut-off filter. Probes Py and Ox are references loaded with the dyes pyronine and oxonine. Probes A to E contain a 1:1 mixture of Py and Ox with the following loading for each dye: A) p, B) 2.5 p, C) 5p, D) 10p, and E) 20p.
In the following pdf (97kb), you find a short review of the experiment, originally published by Angew. Chem. Int. Ed. 2003, 42, p.3748. For a more detailed article, click here (pdf, 155kb).