A sulfonyl-containing polymeric material comprising a reaction product of a reaction mixture comprising: a) a precursor polymeric material comprising a polymerized product of a polymerizable composition comprising a monomer of Formula wherein each R 1 is hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl, wherein at least one R 1 is hydrogen; each R 2 is independently hydrogen, alkyl, aryl, alkaryl, aralkyl, combines with a R 3 connected to a same carbon atom to form a cyclic alkyl, or combines with a R 3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings; each R 3 is independently hydrogen, alkyl, aryl, alkaryl, aralkyl, combines with a R 2 connected to a same carbon atom to form a cyclic alkyl, combines with a R 2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R 4 connected to an adjacent carbon atom to form a carbon-carbon bond; and each R 4 is independently hydrogen or combines with R 3 connected to the adjacent carbon atom to form a carbon-carbon bond; and b) a sulfonyl-containing compound, wherein the sulfonyl-containing polymeric material having at least one group of formula -SO 2 R 5 and up to a maximum of one group of formula -SO 2 R 5 for each aromatic ring in the sulfonyl-containing polymeric material; R 5 is -OH, -NH 2, or -NR 6 -Q-N(R 6) 2; each R 6 is independently hydrogen or alkyl; Q is a single bond, alkylene, or a group of formula -(Q 1 -NR 6) x -Q 2 -; each Q 1 is an alkylene; Q 2 is an alkylene; and x is an integer in a range of 1 to 4. a) a precursor polymeric material comprising a polymerized product of a polymerizable composition comprising a monomer of Formula wherein each R 1 is hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl, wherein at least one R 1 is hydrogen; each R 2 is independently hydrogen, alkyl, aryl, alkaryl, aralkyl, combines with a R 3 connected to a same carbon atom to form a cyclic alkyl, or combines with a R 3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings; each R 3 is independently hydrogen, alkyl, aryl, alkaryl, aralkyl, combines with a R 2 connected to a same carbon atom to form a cyclic alkyl, combines with a R 2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R 4 connected to an adjacent carbon atom to form a carbon-carbon bond; and each R 4 is independently hydrogen or combines with R 3 connected to the adjacent carbon atom to form a carbon-carbon bond; and each R 1 is hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl, wherein at least one R 1 is hydrogen; each R 2 is independently hydrogen, alkyl, aryl, alkaryl, aralkyl, combines with a R 3 connected to a same carbon atom to form a cyclic alkyl, or combines with a R 3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings; each R 3 is independently hydrogen, alkyl, aryl, alkaryl, aralkyl, combines with a R 2 connected to a same carbon atom to form a cyclic alkyl, combines with a R 2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R 4 connected to an adjacent carbon atom to form a carbon-carbon bond; and each R 4 is independently hydrogen or combines with R 3 connected to the adjacent carbon atom to form a carbon-carbon bond; and b) a sulfonyl-containing compound, wherein the sulfonyl-containing polymeric material having at least one group of formula -SO 2 R 5 and up to a maximum of one group of formula -SO 2 R 5 for each aromatic ring in the sulfonyl-containing polymeric material; R 5 is -OH, -NH 2, or -NR 6 -Q-N(R 6) 2; each R 6 is independently hydrogen or alkyl; Q is a single bond, alkylene, or a group of formula -(Q 1 -NR 6) x -Q 2 -; each Q 1 is an alkylene; Q 2 is an alkylene; and x is an integer in a range of 1 to 4.