| http://www.w3.org/ns/prov#value | - A preferred subset of the poly(p-phenylenevinylenes) given by Formula III may be represented by structure III-1, as follows: ##STR2## In Formula III-1, M is as defined earlier, n is an integer in the range of 1 to 10 inclusive, and R' is --(CH2)n SO3 - M+, alkyl (1-10C), or aryl.
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