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Optical Carbon Dioxide Sensors Based on Silicone-Encapsulated Room-Temperature Ionic Liquids

Borisov, Sergey M. ; Waldhier, Magdalena C. ; Klimant, Ingo ; Wolfbeis, Otto S.



Abstract

Novel optical carbon dioxide sensors are based on emulsion of room-temperature ionic liquids (RTILs)–1-butyl-3-methylimidazolium salts in a silicone matrix. Semiquantitative determination of CO2 is achieved by dissolving an absorption-based pH indicator (thymol blue, TB, or bromthymol blue, BTB) in the RTIL. A quantitative fluorimetric sensor makes use of 8-hydroxypyrene-1,3,6-trisulfonate ...

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