Fluorescence detectors are much more specific and sensitive than UV detectors. Often I don't know if an analyte has fluorescence or when it has stronger fluorescence.
Is someone aware of any literature about the relationship between structures and fluorescence?
If yes, could you please refer me to it?
Many thanks in advance.

There is a lot of literature on fluorescence spectroscopy or photochemistry, for instance:
D. Rendell, Fluorescence and phosphorescence Spectroscopy, Wiley, Chichester, 1987 (Series: Analytical Chemistry by Open Learning). If you are more into biologicals: L. Brand and M.L. Johnson, Fluorescence Spectroscopy, Methods Enzymol. 278, 1 (1997).
Predictions on basis of structure are very difficult, a rough criterium is: molecules which have low dipole interactions with the solvent tend to fluoresce (of course, they need a chromophore to absorb light). Thus rigid molecules in a solvent of low polarity might fluoresce.