The present invention relates to terphenyl dihydroxy monomers containing
fluorine and fluorinated poly(arylene ether sulfide)s prepared by using
the monomers, more particularly, terphenyl dihydroxy monomers containing
both two hydroxy functional groups and fluorine and fluorinated
poly(arylene ether sulfide)s prepared by an aromatic nucleophilic
substitution polymerization (S.sub.NAr) using the monomers, which are
thus useful as optical materials in the field of information
telecommunications.