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Lanthanide terbium complex: synthesis, electrochemiluminescence (ECL) performance, and sensing application.

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A novel terbium (Tb) complex was synthesized and demonstrated excellent electrochemiluminescence (ECL) properties. This terbium complex enables highly sensitive detection of protocatechuic acid (PCA) for pharmaceutical analysis.

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Area of Science:

  • Coordination Chemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Lanthanide complexes are explored for their unique luminescent properties.
  • Electrochemical luminescence (ECL) offers sensitive detection methods.
  • Development of novel sensors for pharmaceutical analysis is crucial.

Purpose of the Study:

  • To synthesize and characterize a new lanthanide terbium complex.
  • To investigate the electrochemiluminescence (ECL) behavior of the complex.
  • To develop a sensitive ECL-based method for protocatechuic acid (PCA) detection.

Main Methods:

  • Hydrothermal synthesis of the terbium complex.
  • Characterization using Fourier transform infrared spectroscopy (FT-IR) and energy-dispersive X-ray spectroscopy (EDS).
  • Electrochemical luminescence (ECL) measurements in a buffer solution using a glassy carbon electrode.

Main Results:

  • The synthesized Tb-complex exhibited good ECL behavior in the presence of triethanolamine (TEOA).
  • Protocatechuic acid (PCA) caused a significant quenching effect on the ECL signal.
  • A highly sensitive detection method for PCA was established with a linear range of 1.283 × 10-10 M to 3.845 × 10-4 M and a detection limit of 0.085 nM.

Conclusions:

  • A novel terbium complex with efficient ECL properties was successfully synthesized.
  • The developed ECL assay provides a sensitive and effective strategy for PCA detection.
  • This method holds significant potential for applications in pharmaceutical analyses.