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Schlagwörter:
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Zusammenfassung:
We present gas-phase dispersed photoluminescence spectra of
europium-(III) 9-hydroxyphenalen-1-one (HPLN) complexes forming adducts
with alkali metal ions ([Eu(PLN)(3)M](+) with M = Li, Na, K, Rb, and Cs)
confined in a quadrupole ion trap for study. The mass selected alkali
metal cation adducts display a split hypersensitive D-5(0) -> F-7(2)
Eu3+ emission band. One of the two emission components shows a linear
dependence on the radius of the alkali metal cation whereas the other
component displays a quadratic dependence thereon. In addition, the
relative intensities of both components invert in the same order. The
experimental results are interpreted with the support of density
functional calculations and Judd-Ofelt theory, yielding also structural
information on the isolated [Eu(PLN)(3)M](+) chromophores.
