Surfactants for CO<sub>2</sub>

For some 15 years the attainment of efficient, nonfluorinated CO<sub>2</sub>-active surfactants has been a Holy Grail for researchers spanning pure and applied chemical sciences. This article tells the story of small-molecule CO<sub>2</sub>-active surfactants, from the first tentative observations with fluorinated compounds in 1991 up to recently discovered fluorine-free oxygenated amphiphiles.