Ion Luminescence as a Probe of Solution Structure

Luminescence is observed from a series of substituted pyridine and bipyridine complexes of europium and terbium. Since cryptates of lanthanide ions are stable luminescent compounds, many of the complexes that have been studied are deriva- 

Chemiluminescence has been observed from chelate complexes of Eu . For the case of the complex Eu(dbm)3(pyridine), the Do excited state can be populated by energy transfer from the electrogenerated singlet state exciplex BF /TPTA (where BP is benzophenone and TPTA is tri-p-tolylamine). A similar chemiluminescent system has been observed in the thermal decomposition of trimethyl-1,2-dioxetane to a triplet excited state in the presence of Eu(Ha)3(phen). The major fraction of the emission is observed from the Do state of Eu , which is populated by intermolecular energy transfer.  

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