Hybrid Materials Based on Modification of Conducting Organic Polymers

3 HYBRID MATERIALS BASED ON MODIFICATION OF CONDUCTING ORGANIC POLYMERS 

FIGURE 8.2 Repetitive CV response at glassy carbon electrode for a lO-mM aqueous solution of aniline in 0.10 M H SOPotential scan rate, 50 mV/sec. 

In the context of porous hybrid materials, one can note that preparation of composites of inorganic materials with conducting organic polymers is currently under intensive research in order to combine catalytic properties of inorganic materials with conductivity and redox properties of such polymers. 

The EIS response depends on the flhn thickness and morphology, applied potential, and, obviously, the nature of the components of the hybrid system. The hydro-phobic nature of the polymer, the level of doping within the film, and the size of ions in contact with the polymer surface are factors to be considered for studying the response of such materials. In short, the kinetics of the overall charge transfer process should take into account (1) electron hopping between adjacent redox sites (Andrieux et al., 1986) usually described in terms of a Warburg diffusion impedance element (Nieto and Tucceri, 1996) and (2) double-layer charging at the metal-flhn interface, represented in terms of a double-layer capacitance element. 

FIGURE 8.3 Bode plots Ru(bpy)-PA attached to MCM-41 immersed into 0.10 M of H2SO4. (Material courtesy of Prof. Hermenegildo Garcia, Polytechnical University of Valencia.) 

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