Aqueous Ln(III)luminescence agents derived from a tasty precursor

Jocher, Christoph J., Moore, Evan G., Pierce, Jason D. and Raymond, Kenneth N. (2008) Aqueous Ln(III)luminescence agents derived from a tasty precursor. Inorganic Chemistry, 47 18: 7951-7953. doi:10.1021/ic8010162


Author Jocher, Christoph J.
Moore, Evan G.
Pierce, Jason D.
Raymond, Kenneth N.
Title Aqueous Ln(III)luminescence agents derived from a tasty precursor
Journal name Inorganic Chemistry   Check publisher's open access policy
ISSN 0020-1669
1520-510X
Publication date 2008-08-15
Year available 2008
Sub-type Article (original research)
DOI 10.1021/ic8010162
Volume 47
Issue 18
Start page 7951
End page 7953
Total pages 3
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
The synthesis, characterization, and photophysical properties are reported for several Ln(III) complexes of a tetradentate chelate, 5LIO-MAM, derived from the common flavor enhancer “maltol”. Eu(III), Yb(III), and Nd(III) form stable ML2 complexes in aqueous solution that emit in the red or near-infrared (NIR) upon excitation at ca. 330 nm. The synthesis, aqueous stability, and photophysical properties are reported for a novel tetradentate ligand derived from maltol, a commonly used flavor enhancer. In aqueous solution, this chelate forms stable complexes with Ln(III) cations, and sensitized emission was observed from Eu(III), Yb(III), and Nd(III). A comparison with recently reported and structurally analogous ligands reveals a slightly higher basicity but lower complex stability with Eu(III) [pEu = 14.7(1)]. A very poor metal-centered quantum yield with Eu(III) was observed (Φtot = 0.04%), which can be rationalized by the similar energy of the ligand triplet state and the Eu(III) 5D0 emissive level. Instead, sensitized emission from the Yb(III) and Nd(III) cations was observed, which emit in the NIR.
Keyword Flavouring agent
Luminescent agent
Organometallic compound
Ultraviolet spectrophotometry
Water
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online 16 August 2008

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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Created: Mon, 09 Sep 2013, 20:18:31 EST by Evan Moore on behalf of School of Chemistry & Molecular Biosciences