The synergistic effect between polyoxometalates (POMs) and laccase from ascomycete Myceliophthora thermophila has been employed for the first time in oxidative polymerization of catechol. Such a laccase-mediator system (LMS) allowed theformation of a relatively high molecular weight polycatechol as confirmed bysize exclusion chromatography (SEC) and electrospray ionization massspectrometry (ESI-MS) (POMA: 3990 Da and POMB: 3600 Da). The synthesized polymers were applied as dyes for the dyeing of flax fabrics. The color intensity of flax fabrics colored with polymer solutions was evaluated bydiffusion reflectance spectrophotometry via k/s measurements (+10% of fixation ratio). A new synthetic process allowed a dyeing polymer provided upon flax coloration, better color fixation and color resistance when compared to that obtained by conventional synthesis with laccase solely or with addition of organic mediator (HBT).

Laccase/Polyoxometalate mediated oxidative polymerization of catechol for textile dyeing

241st National Meeting (2011)

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