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ITS » Scientific Articles » Luar ITS Posted by email@example.com at 19/12/2014 18:50:43 • 927 Views
ENZYMATIC GRAFTING OF FUNCTIONAL MOLECULES TO THE LIGNIN MODEL DIBENZODIOXOCIN AND LIGNOCELLULOSE MATERIAL
Author : KUDANGA, TUKAYI; PRASETYO, ENDRY NUGROHO ( none; 197310142000121001 ) SIPILA, JUSSI; NYANHONGO, GIBSON SGUEBITZ, GEORG M
Laccase-mediated grafting of functional molecules presents an eco-friendly approach to functionalize lignocellulose materials. In this study functional molecules in the form of reactive phenolic amines hydrophobicity enhancing fluorophenols and selected wood preservatives were for the first time successfully coupled onto the lignin model compound dibenzodioxocin Db as demonstrated by HPLC-MS analysis. A 11-coupling was demonstrated for various combinations including Db and tyramine m z 620.5 Db and 3-O-methyldopamine m z 650.5 Db and 4-hydroxy-3-methoxybenzylamine m z 636.5 Db and 4-fluoro-2-methylphenol m z 609.5 and Db and 2-phenylphenol m z 653.5. Fungal laccases from Trametes hirsuta and T. villosa were more efficient in mediating the coupling of tyramine to dibenzodioxocin and beech Fagus sylvatica wood than a Bacillus sp. laccase with lower redox potential. This work presents for the first time a model for functionalizing of lignocellulose using the lignin model dibenzodioxocin.