Intraligand fluorescence of M(III)(oxinate)3 under ambient conditions with M = Fe, Ru, Os and oxinate = 8-quinolinolate.

The electronic spectra of the complexes M(III)(oxinate) 3 with M = Fe, Ru, Os and oxinate = 8-quinolinolate are dominated by oxinate to M(III) LMCT transitions. Nevertheless, these complexes are also characterized by a fluorescence at higher energies, which originates from the oxinate ligands. This green luminescence appears in solution as well as in the solid state under ambient conditions. The electronic coupling between the IL and the LMCT states is apparently not strong enough to lead to a complete quenching of the oxinate IL fluorescence. [ABSTRACT FROM AUTHOR]