Polyarylamine

The polaronic strategy has also been applied to polymers, incorporating m-phenylene units as coupling links in n-conjugated polymer chains of polyfthienylene ketone) (Dal Colle et al. 1999) as well as of polyarylamine, polyacetylene, and polythiophene (Kaisaki et al. 1991, Murray et al. 1994, Bushby et al. 1997a). Scheme 1.44 represents these polaronic polymers. 

Fig. 6.4S Redox-active polyarylamine dendrimer (according to Selby and Blackstock)...

Hall and Polis 7 prepared a series of polyarylamines using an aromatic nucleophilic substitution-reduction sequence (Scheme 4.20). Hence, 2,4-dinitrofluorobenzene 66 was treated with />-diaminobenzene to afford tetranitro 67, which was reduced to give the corresponding first generation, diamine 68. Repetition of this sequence afforded the second generation tetradecaamine 69. These starburst polyarylamines were complexed with iodine to form semiconducting materials and were the first dendrimers to be examined by cyclic voltammetry. 

The phase-matching thickness of a main chain, poled, polyarylamine polymer was also controlled by applying an electric field, tuning the thickness by 25 nm [73]. With the very reasonable optical propagation losses of 2.7 dB cm-1 at 633 nm, this approach should be revisited in the near future [74]. 

Hall et al. [139] produced a low-molar-mass series of polyarylamine dendrimers by using a protection/deprotection scheme involving the protected, branch cell reagent 2,4-dinitrofluorobenzene. Using various anilines as initiator cores, the... 

Since the early 1990s, activation processes have expanded to include fibrous materials to enhance accessible surface area, for example, carbon precursor polyacrylonitrile and poly(vinylidene fluoride) (PVDF) used to develop fibers for use in electrodes. Carbon aerogels were also demonstrated by the U.S. military to enhance capacitance through electropolymerization of various electroactive polymers [polyaniline, polyarylamine, polypyrrolepoly(o-methoxyaniline)]. The production of thin polymer films (< 10 nm), particularly with poly(-methoxyaniline), produces a negligibly changed porosity considered responsible for improved performance. 

Carbon aerogel or porous carbon electrode is further developed by pore coating process using an electroactive polymer such as polyaniline, polyarylamine, or polypyrrole to increase capacitance. 

All these polyarylamines are amorphous, as confirmed by wide-angle X-ray defraction spectra and thermal analysis. The of these polyarylamines... 

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