Fluorinated Gemini surfactants

f 1 1 2 m−A gemini surfactant represented by the formula: wherein: each Rindependently represents perfluorobutyl or perfluoropropyl; each Rindependently represents alkyl having from 1 to 6 carbon atoms; Land Lrepresent alkylene having from 2 to 18 carbon atoms; each R represents alkyl having from 1 to 6 carbon atoms; Z represents an organic divalent linking group; and nX represents an anion or anions having a charge m, wherein m and n are independently 1 or 2, and wherein the product of n and m is 2. Aqueous compositions containing the gemini surfactant are also disclosed.