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October 1, 1996Angewandte Chemie International Edition in English

Proton‐Controlled Switching of Luminescence in Lanthanide Complexes in Aqueous Solution: pH Sensors Based on Long‐Lived Emission

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Authors

ASA. Prasanna de SilvaQueen's University BelfastHGH. Q. Nimal GunaratneQueen's University BelfastTRTerence E. RiceQueen's University Belfast

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Implication

In vitro experimental study demonstrates responsive terbium luminescence to protonation in aqueous solutions, suggesting utility as pH sensors in fluorescent environments.

Key Points

  • Investigate proton-controlled luminescence switching in a water-soluble terbium complex to evaluate its potential as a long-lived emission pH sensor.
  • Synthesized and tested a terbium complex bearing amino-functionalized side chains in aqueous solution.
  • Measured luminescence intensity changes and emission lifetime upon protonation of the amino groups.
  • Protonation of amino groups in the side chains increased green luminescence intensity by a factor of 16.
  • The complex exhibited a long luminescence lifetime of 0.62 ms, enabling time-resolved detection in autofluorescent backgrounds.

Cite This Study

Silva et al. (1996) studied this question.

synapsesocial.com/papers/6a89b2476fc170cbc2fbb991https://doi.org/10.1002/anie.199621161
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