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. |