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Sensors and Materials
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Sensors and Materials, Volume 19, Number 2 (2007)
Copyright(C) MYU K.K.
pp. 123-132
S&M670 Research Paper
Published: 2007

Luminescent Europium Chelates Synthesis and Fluorescence Properties [PDF]

Quanguo He, Xueli Guo, Yongqiang Zhang, Yan Deng and Wei Wu

(Received November 22, 2006; Accepted March 29, 2007)

Keywords: 4,7-bis(sulfhydrylphenyl)-1,10-phenanthroline-2, 9-dicarboxylic acid (BSPDA), sulfhydrylization (thiolation), europium chelates, luminescence, time-resolved fluorescence, fluorescence lifetime

The europium(III)-chelating ligand BSPDA containing a thiolated group (BSPDA, an abbreviation of 4,7-bis(sulfhydrylphenyl)-1,10- phenanthroline-2,9-dicarboxylic acid) was synthesized from BCPDA (BCPDA, abbreviated form of 4,7-bis (chlorosulfophenyl)-1,10-phenanthroline-2,9-dicarboxylic acid) by reduction, and then complexed with europium (III, Eu3+) to give 1:1 and 2:1 complexes in molar ratio. The luminescent europium chelates’ fluorescence spectra and related lifetimes exceeding several hundreds of microseconds were determined, confirming that the 2:1 complexes have a slightly longer lifetime than the 1:1 complexes because of the more efficient complex interaction and energy transfer from the ligand BSPDA to europium(III) in the former. The results have significant implications to time-resolved-fluorescence-based nanostructuring and detection on biosensor surfaces.

Corresponding author: Yan Deng


Cite this article
Quanguo He, Xueli Guo, Yongqiang Zhang, Yan Deng and Wei Wu, Luminescent Europium Chelates Synthesis and Fluorescence Properties, Sens. Mater., Vol. 19, No. 2, 2007, p. 123-132.



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