Evaluation of a luminescent ruthenium complex immobilized inside Nafion as optical pH sensor

Chun Man Chan, Chun Sing Fung, Kwok Yin Wong, Wai Hung Lo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


The development of an optical pH sensor based on immobilization of a luminescent ruthenium complex, [Ru(bpy)2(dhphen)]2+(bpy = 2,2@?-bipyridine, dhphen = 4,7-dihydroxy-1,10-phenanthroline) in Nafion film is described. The sensor has a useful pH range of 1-8. The typical response time of the sensing film is 2-5 min. The polyanionic nature of the Nafion film eliminates interference from anions. The sensor also shows minimal interference effects from alkali metal and divalent cations and has good photostability and reproducibility.
Original languageEnglish
Pages (from-to)1843-1847
Number of pages5
Issue number9
Publication statusPublished - 1 Jan 1998

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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