Enhancement of Optical Oxygen Sensing Properties of [Ru(bpy)3]2+- Based Composites Along with Maghemite and Ionic Liquid

摘要

?z entrIn this study, we measuredoxygen-induced emission and decay-time data of tris(2,2′-bipyridyl)ruthenium(II)chloride dye in the presence of additives, maghemite and ionic liquid,1-butyl-3-methylimidazolium tetrafluoroborate. The fluorescent dye along withthe additives was embedded in ethylcellulose matrix that was used as supportingmaterial in form of thin-film and electrospun mat. The synthesized maghemite wasused to enhance the oxygen sensitivity and linear working range of the dye. Ionicliquid (IL) was used to increase the stability and sensitivity of the sensingfluorophore. Together with the additives ruthenium dye-based compositesexhibited higher Stern-Volmer constant (KSV), relativesignal change andlarger linear response. High relative signal change and KSV values mean that fluorophorehas a better oxygen gas sensitivity.Stern-Volmer valuesof thin-film and microporousmats were found 1.64×10?2 and 2.21×10?2,the?relative signal changes (I0/I) were calculated as 2.64 and3.21, respectively. There is no previous work about the utilization of bothmaghemite and ionic liquid additives together for the enhancement of oxygensensitivity of the ruthenium.