Ga. Planes et al., A SOLUBLE AND ELECTROACTIVE POLYANILINE OBTAINED BY COUPLING OF 4-SULFOBENZENEDIAZONIUM ION AND POLY(N-METHYLANILINE), Synthetic metals, 97(3), 1998, pp. 223-227
A modified polyaniline was obtained by coupling of the 4-sulfobenzened
iazonium ion with poly (N-methylaniline) (PNMANI) at temperatures belo
w 5 degrees C and in basic or neutral pH conditions. The FT-IR spectra
of the product show all bands due to the poly( N-methylaniline). Addi
tional bands at 1007, 1003 and 623 cm(-1) are assigned to the vibratio
ns of the sulfonate group, incorporated in the polymer matrix. A new b
and at 1485 cm(-1) is also present, assigned to the stretching of the
azo bond. The polymer is soluble in aqueous base. The results suggest
the formation of an ate-substituted poly (N-methylaniline): poly (4-su
lfobenzenazo-(N-methylaniline)) (p(4SBA-NMANI)). The solution spectra
show absorption bands at 242, 310 and 595 nm. Thin films deposited on
glassy carbon show clear electroactivity. The method could be used to
produce electroactive films with bonded functionalities. (C) 1998 Else
vier Science S.A. All rights reserved.