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Substitutional Photoluminescence Modulation in Adducts of a Europium Chelate with a Range of Alkali Metal Cations: A Gas-Phase Study

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Rotter,  Martin
Martin Rotter, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Greisch, J.-F., Harding, M. E., Schaefer, B., Rotter, M., Ruben, M., Klopper, W., et al. (2014). Substitutional Photoluminescence Modulation in Adducts of a Europium Chelate with a Range of Alkali Metal Cations: A Gas-Phase Study. The Journal of Physical Chemistry A, 118(1), 94-102. doi:10.1021/jp4086624.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0017-B2E6-A
Abstract
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.