Original Paper

Microchimica Acta

, Volume 161, Issue 1, pp 209-216

First online:

Emission based oxygen sensing approach with tris(2,2′-bipyridyl)ruthenium(II)chloride in green chemistry reagents: room temperature ionic liquids

  • Sevinc Z. TopalAffiliated withDepartment of Chemistry, Faculty of Arts and Sciences, University of Ege
  • , Kadriye ErtekinAffiliated withDepartment of Chemistry, Faculty of Arts and Sciences, University of Dokuz Eylul Email author 
  • , Derya TopkayaAffiliated withDepartment of Chemistry, Faculty of Arts and Sciences, University of Dokuz Eylul
  • , Serap AlpAffiliated withDepartment of Chemistry, Faculty of Arts and Sciences, University of Dokuz Eylul
  • , Berrin YenigulAffiliated withDepartment of Chemistry, Faculty of Arts and Sciences, University of Ege

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Abstract.

Room temperature ionic liquids doped with tris(2,2′-bipyridyl)ruthenium(II)chloride together with chemically and biochemically inert perfluoro chemicals (PFCs) have been used for the first time for optical O2 sensing purposes.

The response to oxygen of the Ru complex in 1-methyl-3-butylimidazolium tetrafluoroborate (RTIL-I) and 1-methyl-3-butylimidazolium bromide (RTIL-II) has been evaluated in terms of sensitivity, stability, regeneration ability and response time. The response times were 2 and 5 s, respectively, and the signal changes were reversible. Better oxygen solubility, enhanced molar absorption coefficients and photostabilies were found for the RTILs. The stability the Ru complex in RTILs was tested over 12 months and it is when stored in the ambient air of the laboratory.

Keywords: Room temperature ionic liquid; ionic liquid; optical oxygen sensing; fluorescence; Ru(bpy)3 complex