| http://www.w3.org/ns/prov#value | - In another embodiment, the instant invention is a polymer corresponding to the formula: wherein R1 is selected from the group consisting of cyclic and acyclic organic groups, wherein R2 is independently a cyclic or acyclic organic group, wherein R3 is selected from the group consisting of NO2, N???O, O and H, wherein R4 is selected from the group consisting of a halogen, an alkyl group, a sulfonat
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