
TY  - JOUR
A1  - Norris, Ian D. 
A1  - Kane-Maguire, Leon A. P. 
A1  - Wallace, Gordon G. 
A1  - Mattoso, Luiz H. C. 
T1  - Chiral Induction in the Acid Doping of Poly(<emph type="2">o</emph>-methoxyaniline)
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2000
VL  - 53
IS  - 2
SP  - 89
EP  - 92
KW  - Absorption spectrum; camphorsulfonic acid; circular dichroism; dimethyl sulfoxide; emeraldine;polaron band.
UR  - https://doi.org/10.1071/CH00004 
N2  - The acid doping of the emeraldine base form of poly(o-methoxyaniline) (POMA) with 0.10 mol dm&#8211;3 (+)-(1S)-camphor-10-sulfonic acid (HCSA) in dimethyl sulfoxide solvent causes the induction of chirality in the poly(o-methoxyaniline) backbone by the chiral (+)-CSA&#8211; dopant anion leading to optically active POMA&#183;(+)-HCSA emeraldine salts. The salts obtained from both high molecular weight (Mw = 144000 Da) and low molecular weight (Mw = 31000 Da) emeraldine base precursors exhibit a well defined high wavelength polaron absorption band consistent with a &#8216;compact coil&#8217; conformation. In the high molecular weight case, this band undergoes a large red shift (&#916; = 130 nm) over 48 h which is attributed to slow de-aggregation of the polymer chains. Chiral induction into the poly(o-methoxyaniline) chains is much slower than for the analogous acid doping of the parent polyaniline emeraldine base, due to steric hindrance to polymer rearrangement by the methoxy ring substituent. 
ER  -

