Doped polythiophene

Doped polyphenylene sulfide Doped polythiophene Doped polyacetylene (Metallic) Conductors... 

The direct oxidative polymerization of a thiophene monomer has also been successfully employed to prepare polythiophene, for example, using FeCl3 in chloroform solvent.32 MoC15 may be similarly employed as both the oxidant and dopant.33 Subsequent reduction with ammonia of the doped polythiophene products from these FeCl3 and MoC15 oxidations provides the neutral polymer. 

Antiserum to atrazine adsorbed onto (i) polyacetylene films doped with iodine, (ii) iodine-doped polythiophene films on gold electrodes Atrazine [43]... 

Cao et al. [133] studied the air stability of re-doped polythiophene which was prepared electrochemically and then compensated by aqueous ammonia as detailed in Table 16.8. Ammonia-compensated polythiophene was found to be quite stable when stored in an ambient atmosphere for 3 months, as neither any weight gain nor any change in infra-red spectmm was observed. Both the chemically re-doped and electrochemically prepared polythiophene showed much better stability as compared to polyacetylene and the air stability of the polymer was found to be dependent on the doping counter-ion as well as the solvent used in electrochemical polymerization. Electrochemically prepared polythiophene from a mixture of CH3CN and CH3NO2 (1 1 by volume) maintained their electrical conductivity, whereas the polymer re-doped chemically by FeCls was observed to be most stable in ambient air. 

Structme and physical properties of PPy, 672 Structme of doped polythiophenes, 115 Styrenesulphonic acid, 750 Substituted bithiophenes, 93 Substituted diphenylacetylenes, 811 Substituted oligomers, 93 Substituted polyacetylene, 227. 243 Substituted poly(alkylthiophenes), 833 Substituted polyanilmes, 838. 853 Substituted polypyrroles, 819. 849... 

Raman spectra of doped polythiophene exhibit also modifications provided excitation wavelengths are taken in the red range. The main Ag mode is shifted to 1411 cm. An analysis of these spectra in the frame of our method, i.e. by modifying the main force constants associated to the bonds of the polymer backbone, leads also to a good fit of the modified Raman spectra. In contrary to doped PPP or doped PPV, it is not obvious whether the quinoid structure appears clearly. Instead, we do need to modify the C-S force constant, putting in evidence that the S atom plays a certain role in the electronic structure modification. Further details on the calculations will also be published elsewhere. 

Aviram has proposed [22] a spiro-linked polythiophene system as a possible interconnection between conducting "molecular wires based on n or p-doped polythiophene. 

Elarima, Y, Y. Kunugi, K. Yamashita, and M. Shiotani. 2000. Determination of mobilities of charge carriers in electrochemically anion-doped polythiophene film. Chem Phys Lett 317 310. 

For doped polythiophene, there is variation of the doping level attained with different dopants. For BF4 doped PT [146], A( f) 0.05 states/eV-C at the 4—8% dopant level. 

Figure 1.20 Various self-doped polythiophene derivatives.

A. Berlin, G. Schiavon, S. Zecchin, G. Zotti, New highly conjugated self-doped polythiophenes functionalized with alkyl ammonium groups, Synthetic Metals 2001,119,153. 

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