Phosphorescence Decay and Dynamics in Polymer Solids

Photochemically Induced Fluorescence Control with Intermolecular Energy Transfer from a Fluorescent Dye to a Photochromic Diarylethene in a Polymer Film

“…Energy transfer in a solid film observed in the present experiments is supposed to proceed when there is no molecular diffusion and the Perrin equation (eq 2) , holds where I 0 and I are the luminescence intensities of donor in the absence and presence of acceptor, respectively, C 0 is the critical concentration of quenching, and C is the concentration of the acceptor. The plots of ln( I 0 / I ) vs C in Figure for the PMMA films containing CMTE (acceptor) and PM546 (donor) give the critical concentrations, C 0 , for fluorescence quenching of PM546 with CMTE before and after photoisomerization to be 0.27 M (7.25 wt %) and 0.084 M (2.28 wt %), respectively.…”