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|Title:||Polyoxometalate/laccase-mediated oxidative polymerization of catechol for textile dyeing|
Silva, Carla Manuela Pereira Marinho da
Evtuguin, D. V.
Gamelas, José A. F.
Paulo, Artur Cavaco
|Journal:||Applied Microbiology and Biotechnology|
|Abstract(s):||The synergistic effect between polyoxometalates (POMs), namely K5[SiW11VVO40]·11H2O and H5[PMo10 VV2O40]·13H2O and laccase from ascomycete Myceliophthora thermophila has been employed for the first time in oxidative polymerization of catechol. Such a laccase-mediator system allowed the formation of a relatively high molecular weight polycatechol as confirmed by size exclusion chromatography and electrospray ionization mass spectrometry (ESI-MS) (3990 Da when using K5[SiW11VVO40]·11H2O and 3600 Da with H5[PMo10VV 2O40]·13H2O). 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 by diffuse 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 (1-hydroxybenzotriazole).|
|Appears in Collections:||DET/2C2T - Artigos em revistas internacionais com arbitragem científica|
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|2010 Polyoxometalate-laccase-mediated oxidative polymerization.pdf||Polyoxometalate/laccase-mediated oxidative polymerization of catechol for textile dyeing||516,16 kB||Adobe PDF||View/Open|