Biomedical Engineering Reference
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et al. found that the Tf
anion was trapped in PEDOT film when
it was p-doped in IL mixed with Li[Tf
N
-
2
N] [57]. The system preserved
electroneutrality by the simultaneous incorporation of cations in
the film. Impedance and EQCM studies conducted by Ispas et al.
showed as well that during the potential scanning part of the anions
were trapped in the film [58]. PEDOT has also been synthesized in
polymeric IL by Kim et al. [59]. Organic dispersion of PEDOT was
done with the use of polymeric imidazolium-based IL with Br
2
as
the anion. The polymeric IL acted as a polymerization template.
The resulting polymer complex had both better electroactivity
and controlled structure than PEDOT made without polymeric IL.
The possible mechanism of polymerization includes ammonium
persulfate reaction with polymeric IL and persulfate oxidation
of EDOT leading to nonaqueous dispersions of PEDOT. Döbbelin
et al. reported electrosynthesis of PEDOT derivatives that were
functionalized with imidazolium IL [60]. Three different anions:
BF
-
were tested. It was found that by changing the
anion the hydrophobicity of PEDOT derivative can be tuned and
was verified by contact angle measurements. Polymerization of
PEDOT derivatives was conducted on ITO in dichloromethane, and
it was found that polymerization rate was higher in the BF
-
, Tf
N
-
and PF
-
4
2
6
-
-based
4
derivative than in the PF
-
, and Tf
N
-
derivatives.
6
2
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