4.7 Article

Efficient Tb3+-to-Eu3+ energy transfer for colorimetric luminescence sensing

期刊

ANALYTICA CHIMICA ACTA
卷 1221, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.aca.2022.340026

关键词

Luminescent lanthanide compound; Tb3+-to-Eu(3+)energytransfer; Colorimetric luminescence sensing; l-Phenylalanine

资金

  1. National Natural Science Foundation of China [22071047, 22075071]
  2. Outstanding Youth Science Foundation of Hei-longjiang University [JCL202002]

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This study achieves high-efficiency Tb-to-Eu energy transfer (>90%) in Eu/Tb bimetallic lanthanide coordination polymers with ultralow Eu3+ proportion (<6%). As a sensor, the yellow-light-emitting material exhibits visible luminescence behavior for micromolar-level detection of L-phenylalanine in water and serum, with high selectivity and competitiveness determined by an updated Stern-Volmer equation. The excited-state inter-ligand photon transfer is found to greatly contribute to the superior energy transfer and luminometric behavior of the material.
State-of-the-art Tb-to-Eu energy transfer (TEET) efficiency (> 90%) under ultralow Eu3+ proportion (< 6%) has been achieved in Eu/Tb bimetallic lanthanide coordination polymers (LnCPs). The yellow-light-emitting sample as sensor exhibits micromolar l-phenylalanine (l-Phe) in water and serum via obvious yellow-to-green lumino-metric behavior, meanwhile nanomolar-level detection limits are determined in terms of an updated Stern-Volmer equation with high selectivity and competitiveness. Excited-state inter-ligand photon transfer (ESILPT) greatly contributes to superior TEET property and outstanding luminometric behavior. This work opens a window for developing sensitive and stable visualization sensing, being of values on monitoring biochemical markers.

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