Novel lanthanide pH fluorescent probes based on multiple emissions and its visible-light-sensitized feature

Jintai Lin, Yuhui Zheng, Qianming Wang, Zhi Zeng, Chengcheng Zhang

Research output: Contribution to journalArticle

17 Scopus citations


A new type of Eu(III) ofloxacin complex as the fluorescent pH indicator has been presented. Compared to pure ligand, the complex offers more distinguished color changes (green-red-blue) derived from both lanthanide line emissions and the secondary ionization steps of ofloxacin. During the concentration dependence experiments, the photoluminescence studies on the complex showed that the excitation of this pH probe can occur at a very long wavelength which extends to visible range (Ex=427. nm). Furthermore, the functional complex was successfully incorporated into soft networks and two novel luminescent hydrogels (rod and film) were fabricated. The soft materials also exhibited specific responses towards the pH variation. Finally, the onion cell-stain experiments were carried out to further confirm the validity of pH dependence and the results support the idea that the material will be suitable for monitoring biological samples in the future.

Original languageEnglish (US)
Pages (from-to)51-58
Number of pages8
JournalAnalytica Chimica Acta
Publication statusPublished - Aug 11 2014



  • Europium
  • Fluorescence probe
  • Hydrogel
  • Ofloxacin
  • PH value

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

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