The influence of trivalent lanthanide ions on the magnetic field effect of pyrene-dimethylaniline exciplex luminescence
Abstract
It is observed that the lanthanide acetylacetonates (Ln(acac) 3) quench the magnetic field effect of pyrene-dimethylaniline exciplex luminescence. The quenching rate constants ( Q) for the different Ln 3+ ions follow the same trend as was previously observed in the photolysis of quinones and ketones in micellar media. The parallelism of Qs with spin-only moments of Ln 3+ ions puzzled previous workers. We have noted a correlation of Qs with the square-root of the de Gennes factor G = ( g - 1 ) 2J( J + 1), and offer an explanation of our observation on the basis of Heisenberg exchange interaction.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- October 1987
- DOI:
- 10.1016/0009-2614(87)80102-1
- Bibcode:
- 1987CPL...141..115B