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Switchable Solvents Consisting of Amidine/Alcohol or Guanidine/Alcohol Mixtures

2007; American Chemical Society; Volume: 47; Issue: 3 Linguagem: Inglês

10.1021/ie070552r

1520-5045

Lam Phan, D. D. K. Chiu, David J. Heldebrant, Hillary Huttenhower, Ejae John, Xiaowang Li, Paméla Pollet, Ruiyao Wang, Charles A. Eckert, Charles L. Liotta, Philip G. Jessop,

Chemical Synthesis and Reactions

Liquids that consist of a mixture of an alcohol and either an amidine or a guanidine have been developed to switch from a low-polarity form to a high-polarity ionic liquid upon treatment with CO2 at atmospheric pressure. Treatment with N2 and/or mild heat (50−60 °C) reverses the process. These liquids can be used as switchable solvents to dissolve and then precipitate a solute or to dissolve reagents for a chemical synthesis and then precipitate the product.