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Stable Lanthanide Luminescence Agents Highly Emissive in Aqueous Solution: Multidentate 2-Hydroxyisophthalamide Complexes of Sm 3+ , Eu 3+ , Tb 3+ , Dy 3+

By Stephane Petoud, Seth Cohen, Jean-Claude Bunzli and Kenneth Raymond

Abstract

International audienceEfficient lanthanide (Ln) luminescent probes require good ligand-to-metal energy transfer and high aqueous stability. A family of ligands based on 2-hydroxyisophthalamide chelating units is reported. These form highly stable, eight-coordinate Ln complexes. Several of these (Ln = Sm, Eu, Tb, Dy) emit in the visible region with good ligand-to-lanthanide energy transfer. The absolute quantum yields of the two Tb complexes studies (Phi = 0.59, 0.61) and high absorbance make these the brightest luminescent probes for time-resolved detection; the emission spectrum of one complex can be seen down to 10-15 M. The low overlap of the four different Ln complexes enables their simultaneous detection and discrimination

Topics: [CHIM]Chemical Sciences
Publisher: 'American Chemical Society (ACS)'
Year: 2003
DOI identifier: 10.1021/ja0379363
OAI identifier: oai:HAL:hal-02090730v1
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