| http://www.w3.org/ns/prov#value | - and R' are independently selected from the group consisting of hydrogen, an alkyl having one or more carbon atoms and an aryl; and A is an alkali metal, a quaternary nitrogen radical, or R; Rf and Rf ' are independently selected from the group consisting of F, Cl, a perfluoroalkyl radical and a chlorofluoroalkyl radical; a=0 or an integer greater than 0; b=0 or an integer greater than 0;and at le
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