Development of luminescent Sm(III) chelates containing hexadentate to nonadentate ligands: synthesis, photophysical properties and coupling to biomolecules

Seventeen novel samarium (Sm)(III) chelates containing two iminodiacetic acid moieties were synthesised and their luminescence properties were measured with the aim of developing new labels for biochemical applications. The chelates contained different numbers of coordinating groups. According to th...

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Bibliographic Details
Published in:Journal of luminescence 2005-05, Vol.113 (1), p.17-26
Main Authors: Hakala, Harri, Liitti, Päivi, Peuralahti, Jari, Karvinen, Jarkko, Mukkala, Veli-Matti, Hovinen, Jari
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Lifetime
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
Quantum yield
Time-resolved luminescence
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Summary:Seventeen novel samarium (Sm)(III) chelates containing two iminodiacetic acid moieties were synthesised and their luminescence properties were measured with the aim of developing new labels for biochemical applications. The chelates contained different numbers of coordinating groups. According to the results obtained, the Sm(III) chelates that are to be used in time-resolved luminescence biochemical assays should be nonadentate in order to have a sufficient lifetime. Chelates having a terpyridine structure in the ligand seem to be promising alternatives. In addition, an equation for the determination of the number of water molecules in the first coordination sphere of Sm(III) ions in the chelate was developed.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2004.08.048