Authors: Sola-Llano, R; Oliden-Sanchez, A; Alfayate, A; Gomez-Hortiguela, L; Perez-Pariente, J; Arbeloa, T; Hofkens, J; Fron, E; Martinez-Martinez, V Article. Nanomaterials. vol: 10. page: . Date: JUN. 2020. Doi: 10.3390/nano10061173. Abstract: By simultaneous occlusion of rationally chosen dyes, emitting in the blue, green and red region of the electromagnetic spectrum, into the one-dimensional channels of a magnesium-aluminophosphate with AEL-zeolitic type structure, MgAPO-11, a solid-state system with efficient white light emission under UV excitation, was achieved. The dyes herein selected-acridine (AC), pyronin Y (PY), and hemicyanine LDS722-ensure overall a good match between their molecular sizes and the MgAPO-11 channel dimensions. The occlusion was carried out via the crystallization inclusion method, in a suitable proportion of the three dyes to render efficient white fluorescence systems by means of fine-tuned FRET (fluorescence resonance energy transfer) energy transfer processes. The FRET processes are thoroughly examined by the analysis of fluorescence decay traces using the femtosecond fluorescence up-conversion technique..