4.6 Article

The nature of ionic liquids in the gas phase

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JOURNAL OF PHYSICAL CHEMISTRY A
卷 111, 期 28, 页码 6176-6182

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AMER CHEMICAL SOC
DOI: 10.1021/jp073006k

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  1. Engineering and Physical Sciences Research Council [EP/D029538/1] Funding Source: researchfish

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Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) experiments showed that when aprotic ionic liquids vaporize under pressure and temperature conditions similar to those of a reduced-pressure distillation, the gas phase is composed of discrete anion-cation pairs. The evolution of the mass spectrometric signals recorded during fractional distillations of binary ionic liquid mixtures allowed us to monitor the changes of the gas-phase composition and the relative volatility of the components. In addition, we have studied a protic ionic liquid, and demonstrated that it exists as separated neutral molecules in the gas phase.

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