| Abstract
| - A detailed study of the luminescence decay curves of pyrene included within p-tert-butylcalix[4]arene cavitiesand benzophenone into silicalite channels is reported. A new methodology for a lifetime distribution analysisof the decay curve of probes onto heterogeneous surfaces is presented, which allows for asymmetric distributionsand uses Voigt profiles (Gaussian and Lorentzian mixture) instead of pure Gaussian or Lorentzian distributions.Our approach uses a very simple and widely available tool for fitting, the Microsoft Excel Solver. In the caseof the pyrene/tert-butylcalix[4]arene sample, the room temperature luminescence detected in the microsecondtime scale was not only the phosphorescence of pyrene but also monomer delayed fluorescence, crystalphosphorescence, and excimer delayed fluorescence. In the benzophenone/silicalite case, three emissive formsof benzophenone could be assigned, one of benzophenone included into the silicalite circular zigzag channels,another for emplacement into the elliptical straight channels and finally when benzophenone is placed at thecrossing points of those silicalite channels, where smaller spatial restrictions for benzophenone exist.
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