Estimating the Donor–Acceptor Distance To Tune the Emission Efficiency of Luminescent Lanthanide Compounds

The influence of the donor–acceptor distance R L on the photophysical properties, including the emission quantum yield, of two europium complexes with the same coordination number, and thus similar microsymmetries, was investigated by spectroscopic and computational methods. K3[Eu­(dipicCbz)3] was s...

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Bibliographic Details
Published in:Inorganic chemistry 2017-01, Vol.56 (2), p.709-712
Main Authors: Monteiro, Jorge H. S. K, de Bettencourt-Dias, Ana, Sigoli, Fernando A
Format: Article
Language:English
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Summary:The influence of the donor–acceptor distance R L on the photophysical properties, including the emission quantum yield, of two europium complexes with the same coordination number, and thus similar microsymmetries, was investigated by spectroscopic and computational methods. K3[Eu­(dipicCbz)3] was synthesized using the new ligand dipicCbz and its photophysical properties compared to Cs3[Eu­(dipic)3]. We found that a 50% increase in R L from 4.1 to 6.5 Å results in a substantial decrease in the emission efficiency from 24 to 1.8%.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.6b02637