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Science 31 October 2003:
Vol. 302. no. 5646, pp. 792 - 793
DOI: 10.1126/science.1090313
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Perspectives

CHEMISTRY:
Ionic Liquids--Solvents of the Future?

Robin D. Rogers and Kenneth R. Seddon

Ionic liquids are composed entirely of ions. Because of the wide range of possible binary and ternary ionic liquids, they offer a potentially wide range of solvent properties. In their Perspective, Rogers and Seddon review recent progress on developing new ionic liquid solvents for use in chemical synthesis, catalysis, fuel cells, and other applications. Ionic liquids are considered advantageous not only because of their versatility but also for their "green" credentials, although it is important to remember that not all ionic liquids are environmentally benign. One industrial process has been reported, and others may not be far behind. The authors conclude that in the next decade, ionic liquids are likely to replace conventional solvents in many applications.

R. D. Rogers is at the Center for Green Manufacturing, The University of Alabama, Tuscaloosa, AL 35487, USA. E-mail: rdrogers{at}bama.ua.edu K. R. Seddon is with Queen's University Ionic Liquid Laboratories (QUILL), The Queen's University of Belfast, Belfast BT9 5AG, UK. E-mail: k.seddon{at}qub.ac.uk

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