- Dyeionogels: Proton-responsive ionogels based on a dye-ionic liquid exhibiting reversible color change
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Transparent, ion-conducting, and flexible ionogels based on the room temperature ionic liquid (IL) 1-butyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide [Bmim][N(Tf)2], the dye-IL (DIL) 1-butyl-3- methylimidazolium methyl orange [Bmim][MO], and poly(methylmethacrylate) (PMMA) are prepared. Upon IL incorporation the thermal stability of the PMMA matrix significantly increases from 220 to 280 °C. The ionogels have a relatively high ionic conductivity of 10-4 S cm-1 at 373 K. Most importantly, the ionogels exhibit a strong and reversible color change when exposed to aqueous or organic solutions containing protons or hydroxide ions. The resulting material is thus a prototype of soft multifunctional matter featuring ionic conductivity, easy processability, response to changes in the environment, and a strong readout signal, the color change, that could be used in optical data storage or environmental sensing.
- Xie, Zai-Lai,Huang, Xing,Taubert, Andreas
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- Intrinsically photochromic ionic liquids
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Intrinsically photochromic ionic liquids can be prepared by simple combination of methyl orange, a well-known example of a photochromic azobenzene derivative, and the appropriate organic cations. These novel compounds are light responsive and maintain the
- Branco, Luis C.,Pina, Fernando
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supporting information; experimental part
p. 6204 - 6206
(2010/02/15)
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