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

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Abstract

In this study, a new lanthanide terbium complex, Tb(pzda)3(NO3)3·nH2O, was synthesized by a hydrothermal method and characterized by Fourier transform infrared spectroscopy (FT-IR) and energy-dispersive X-ray spectroscopy (EDS). It was found that the as-synthesized Tb-complex exhibited good electrochemiluminescence (ECL) behavior in the presence of triethanolamine (TEOA) in a HAc-NaAc buffer solution on a glassy carbon electrode. The possible reaction mechanism has been discussed based on the fluorescence spectra and ECL spectra. For sensing applications, it was found that protocatechuic acid (PCA) had an obvious quenching effect on the ECL signal of the Tb-complex, and this resulted in a decreased ECL signal associated with the concentration of PCA. Therefore, a highly sensitive method for the detection of 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 at an S/N ratio of 3. This novel ECL assay strategy with an outstanding ECL efficiency offers great potential for pharmaceutical analyses.

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

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Publication details

The article was received on 21 Jan 2019, accepted on 01 Feb 2019 and first published on 06 Feb 2019


Article type: Paper
DOI: 10.1039/C9AN00137A
Citation: Analyst, 2019, Advance Article

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

    X. Xu, X. Qin, L. Wang, X. Wang, J. Lu, X. Qiu and Y. Zhu, Analyst, 2019, Advance Article , DOI: 10.1039/C9AN00137A

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