| abstract |
PCT No. PCT/US97/13144 Sec. 371 Date Dec. 6, 1999 Sec. 102(e) Date Dec. 6, 1999 PCT Filed Jul. 25, 1997 PCT Pub. No. WO98/04516 PCT Pub. Date Feb. 5, 1998Oligomeric anilines (I; n=2, 4), useful in sensors for volatile organic compounds, in corrosion-resistant coatings for metals and metal alloys, and in applications which use electroactive materials, are prepared. Thus, tetraaniline in the emeraldine oxidation. state (n=1) was prepared by the ferric chloride-promoted oxidative coupling of N-phenyl-1,4-phenylenediamine HCl salt and recrystallizing the reaction mixture from PhMe, and next converted to tetraaniline in the leucoemeraldine oxidation state by treatment with hydrazine. Tetraaniline in the leucoemeraldine oxidation state was then contacted with an oxidative coupling agent (e.g., ammonium peroxydisulfate) to produce aniline oligomers I (n=2 and 4). |