prov:value
| - , --F, --CF3, --NO2 , --CN, --H, ##STR7## where q and q' are independently integers of 1 to about 20, w is an integer of 1 to about 10, and R can be linear or branched; Rf is a linear or branched, perfluorinated or partially-fluorinated alkylene group having from 1 to about 10 (preferably, from about 2 to about 6) carbon atoms and optionally containing one or more catenary ether oxygen atoms;
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