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

摘要

Room temperature ionic liquids doped with tris(2,2'-bipyridyl)rathenium(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-and 1-methyl-3-butylimidazolium bromide (RTIL- 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 photostabi-lies 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.