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Issue 43, 2012
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Multifunctionalized luminescent lanthanide complexes from nonadentate phosphonylated bis-pyrazolyl-pyridine ligands

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Abstract

A series of lanthanide complexes has been prepared from ligands constructed from a bis-pyrazolyl-pyridine core bearing various chelating arms with anionic mixed carboxylate/phosphonate or phosphonate substituents. These ligands form particularly stable complexes with Eu(III) and Tb(III) which display outstanding spectroscopic properties, with excited state lifetimes ranging from 2.6 to 3.2 ms and quantum yields in the 16 to 48% range in water or phosphate buffer. The complexes are significantly more stable than those of analogous ligands bearing only carboxylate groups. Some of the new ligands have a central and flexible pendent link suitable for bio-labelling.

Graphical abstract: Multifunctionalized luminescent lanthanide complexes from nonadentate phosphonylated bis-pyrazolyl-pyridine ligands

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Publication details

The article was received on 01 Jun 2012, accepted on 16 Jul 2012 and first published on 17 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT31181J
Citation: Dalton Trans., 2012,41, 13298-13307
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    Multifunctionalized luminescent lanthanide complexes from nonadentate phosphonylated bis-pyrazolyl-pyridine ligands

    M. Starck and R. Ziessel, Dalton Trans., 2012, 41, 13298
    DOI: 10.1039/C2DT31181J

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