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Lanthanide complex-based fluorescence label for time-resolved fluorescence bioassay.

Jingli Yuan1, Guilan Wang

  • 1Department of Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road, Dalian, P. R. China. jingliyuan@yahoo.com.cn

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Fluorescent lanthanide complexes offer superior properties for sensitive bioassays. Their unique long fluorescence lifetime enables highly accurate detection by minimizing background noise.

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Materials Science

Background:

  • Organic fluorescent dyes suffer from short fluorescence lifetimes and background interference.
  • Lanthanide complexes possess unique photophysical properties: long fluorescence lifetime, large Stokes shift, and sharp emission.
  • These properties are advantageous for time-resolved fluorescence bioassays.

Purpose of the Study:

  • To review recent advancements in lanthanide complex-based fluorescence labels.
  • To highlight their applications in microsecond time-resolved fluorescence bioassays.
  • To showcase their utility in improving assay sensitivity and specificity.

Main Methods:

  • Development and synthesis of novel lanthanide complexes.
  • Application of these complexes as labels in various bioassays.
  • Utilizing time-resolved fluorescence spectroscopy for signal detection.

Main Results:

  • Lanthanide complexes enable highly sensitive time-resolved fluorescence immunoassays, DNA hybridization assays, cell activity assays, and bio-imaging.
  • The long fluorescence lifetime effectively distinguishes signals from background noise (autofluorescence, scattering).
  • Remarkable improvements in assay sensitivity have been achieved.

Conclusions:

  • Lanthanide complex-based fluorescence labels are powerful tools for advanced bioanalytical applications.
  • Their unique properties significantly enhance the performance of time-resolved fluorescence bioassays.
  • Future research directions in lanthanide complex development and application are promising.