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Formation of polymeric pigments from syringaldehyde in the presence of bacteria. Comparison with chemical oxidative coupling

par Atarhouch, Touriya ;Daro, Arlette ;David, Christiane
Référence European Polymer Journal, 27, 6, page (527-536)
Publication Publié, 1991

Article révisé par les pairs

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Résumé :

The formation of polymeric pigments from hydroxy-substituted benzoïc acid in the presence of some strains of Pseudomonas putida was investigated as a possible route to new aromatic polymers. The rate of disappearance of aromatic compounds such as syringaldehyde and its degradation products syringic acid and 3-O-methylgallic acid have been measured. The structure of the pigment has been investigated by GPC, u.v. and FTIR spectroscopy, NMR and elemental analysis. It has been compared with that of the polymeric pigments obtained by chemical oxidative coupling in the absence of bacteria. The bacterial pigments were found to be of badly defined structure different from that of the chemical pigments, and probably similar to humic acids; indeed amino acids are incorporated in the polymer chain. The role of the bacteria at the various steps of the metabolization of the initial aromatic compounds and of pigment formation is discussed. © 1991.