
%0 Journal Article
%A Norris, Ian D. 
%A Kane-Maguire, Leon A. P. 
%A Wallace, Gordon G. 
%A Mattoso, Luiz H. C. 
%T Chiral Induction in the Acid Doping of Poly(<emph type="2">o</emph>-methoxyaniline)
%J Australian Journal of Chemistry
%D 2000/05/11
%V 53
%N 2
%P 89-92
%K Absorption spectrum; camphorsulfonic acid; circular dichroism; dimethyl sulfoxide; emeraldine;polaron band.
%R https://doi.org/10.1071/CH00004
%U https://www.publish.csiro.au/paper/CH00004 
%X 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. 
