Poly o-aminobenzylphosphonic

Figure 2.39 Synthesis route of monomer, o-aminobenzylphosphonic acid (4) and self-doped polymer, poly(o-aminobenzylphosphonic acid) (5) (Reprinted with permission from Journal of the American Chemical Society, 117, 8517. Copyright (1995) American Chemical Society.)...

Example 4 Polyaniline-Phosphonic Acid (PANI-PA) - Synthesis of Homopolymers of PANl-Bu/Bn/DcPA and Poly(o-aminobenzylphosphonic Add)... 

In addition to functionalization of polyanilines with sulfonic and carboxylic acids, the corresponding phosphonic acid derivatives have been prepared, o-Aminobenzylphosphonic acid was prepared as shown in Figure 20.54 [42,43]. Oxidative coupling of the above monomer in an acidic medium yielded poly(o-aminobenzylphosphonic acid) (Figure 20.55). Spectroscopic analysis was consistent with head-to-tail oxidative coupling through the /Jara-position. The as-prepared polymer was in its emeraldine oxidation state in which 43% of the N-atoms were protonated by the pendent acid. This polymer was insoluble in both non-aqueous solvents and aqueous acidic solutions. 

Figure 20.56. Sodium salts of poly(o-aminobenzylphosphonic acid) resulting from neutralization of the as-prepared polymer. (Reprinted by permission of ref. 43)...

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