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Updated: Dec 23, 2025

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Smart lanthanide antennas for sensing water.

Francisco Fueyo-González1, Emilio Garcia-Fernandez2, David Martínez2

  • 1Instituto de Química Médica (CSIC), Juan de la Cierva 3, Madrid 28006, Spain. rosario@iqm.csic.es.

Chemical Communications (Cambridge, England)
|April 30, 2020
PubMed
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Two novel lanthanide antennas selectively detect Europium (Eu3+) and Terbium (Tb3+) luminescence. Their emission is quenched by water, enabling their use as highly sensitive water sensors.

Area of Science:

  • Coordination Chemistry
  • Luminescent Materials
  • Analytical Chemistry

Background:

  • Lanthanide complexes are crucial for luminescence applications.
  • Developing selective and sensitive detection methods is essential for environmental monitoring.
  • Organic molecules can act as antennas to sensitize lanthanide luminescence.

Purpose of the Study:

  • To synthesize and characterize two new families of lanthanide antenna compounds.
  • To investigate the luminescent properties of these compounds with different lanthanide ions.
  • To evaluate their potential as water sensors.

Main Methods:

  • Synthesis of 8-Methoxy-4,5-dihydrocyclopenta[de]quinolin-2(1H)-one phosphonates/carboxylates and quinolin-2(1H)-one analogues.
  • Spectroscopic analysis of lanthanide luminescence (Eu3+ and Tb3+).

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  • Investigation of the effect of water on luminescence intensity.

    • Main Results:

    • The phosphonate/carboxylate derivatives selectively sensitized Eu3+ luminescence in organic solvents.
    • The quinolin-2(1H)-one analogues selectively sensitized Tb3+ emission.
    • Both antenna types showed luminescence quenching upon water addition.

    Conclusions:

    • The new lanthanide antennas exhibit selective luminescence sensitization.
    • The water-induced quenching effect allows for sensitive water detection.
    • These compounds show promise as highly sensitive water sensors.