Triboluminescent spectrum and crystal structure of a europate complex with the most intensely triboluminescent emission at ambient temperature

The triboluminescent and photoluminescent spectra of morpholinium tetrakis(dibenzoylmethide)europate is superimposed, and its triboluminescence exhibits the most brilliantly triboluminescent activity in the complexes previously known. The crystal structural determination reveals that a noncentrosymmetric space group and disorder in the chelate ring correlate well with the observed triboluminescent activity.