Highly Luminescent Lanthanide Complexes of 1 Hydroxy-2-pyridinones

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The synthesis, X-ray structure, stability, and photophysical properties of several trivalent lanthanide complexes formed from two differing bis-bidentate ligands incorporating either alkyl or alkyl ether linkages and featuring the 1-hydroxy-2-pyridinone (1,2-HOPO) chelate group in complex with Eu(III), Sm(III) and Gd(III) are reported. The Eu(III) complexes are among some of the best examples, pairing highly efficient emission ({Phi}{sub tot}{sup Eu} {approx} 21.5%) with high stability (pEu {approx} 18.6) in aqueous solution, and are excellent candidates for use in biological assays. A comparison of the observed behavior of the complexes with differing backbone linkages shows remarkable similarities, both in stability and photophysical ... continued below

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University of California, Berkeley; Laboratory, Lawrence National; Raymond, Kenneth; Moore, Evan G.; Xu, Jide; Jocher, Christoph J. et al. November 1, 2007.

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The synthesis, X-ray structure, stability, and photophysical properties of several trivalent lanthanide complexes formed from two differing bis-bidentate ligands incorporating either alkyl or alkyl ether linkages and featuring the 1-hydroxy-2-pyridinone (1,2-HOPO) chelate group in complex with Eu(III), Sm(III) and Gd(III) are reported. The Eu(III) complexes are among some of the best examples, pairing highly efficient emission ({Phi}{sub tot}{sup Eu} {approx} 21.5%) with high stability (pEu {approx} 18.6) in aqueous solution, and are excellent candidates for use in biological assays. A comparison of the observed behavior of the complexes with differing backbone linkages shows remarkable similarities, both in stability and photophysical properties. Low temperature photophysical measurements for a Gd(III) complex were also used to gain insight into the electronic structure, and were found to agree with corresponding TD-DFT calculations for a model complex. A comparison of the high resolution Eu(III) emission spectra in solution and from single crystals also revealed a more symmetric coordination geometry about the metal ion in solution due to dynamic rotation of the observed solid state structure.

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32

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  • Journal Name: Inorganic Chemistry

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  • Report No.: LBNL-192E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 927871
  • Archival Resource Key: ark:/67531/metadc901987

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  • November 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 30, 2016, 6:35 p.m.

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University of California, Berkeley; Laboratory, Lawrence National; Raymond, Kenneth; Moore, Evan G.; Xu, Jide; Jocher, Christoph J. et al. Highly Luminescent Lanthanide Complexes of 1 Hydroxy-2-pyridinones, article, November 1, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc901987/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.