Web Release Date: January 16,
Carbon Nanotube Mediated Reduction in Optical Activity in Polyaniline Composite Materials
and
School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia and Instituto de
Carboquimica (CSIC), C/Miguel Luesma Cast
n 4, E-50018, Zaragoza, Spain
Received: September 5, 2007
In Final Form: October 25, 2007
Abstract:
Optically active composite materials were prepared by in situ polymerization of aniline in the presence of multiwalled carbon nanotubes, followed by doping with (R)-(-)-10-camphorsulfonic acid. The reduction in circular dichroism intensity with increasing nanotube loading fraction is attributed to changes in the ratio of "free" polymer versus polymer interacting with carbon nanotubes. These changes are shown to correspond to a decreasing polyaniline stereoselectivity with increasing nanotube loading fraction.
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