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J. Sealey, A.J. Ragauskas, T.J. Elder

Investigations into Laccase-Mediator Delignification of Kraft Pulps

The structure activity effects of 1-hydroxy benzotriazole and phthalimide derivatives as mediators for laccase were studied. Using a softwood kraft pulp it was shown that the N-hydroxy unit is a key component of 1-hydroxybenzotriazole for efficient laccase mediator delignification to occur. It was also found that the 1-hydroxybenzotriazole structure was very sensitive to substituent effects with respect to laccase-mediator delignification. Computational results from PM3 indicate that the bond dissociation energy, and electronic factors of the radical may contribute to the efficiency of the mediator for LMS delignification.

Holzforschung, Walter de Gruyter

Print ISSN: 0018-3830
Volume: 53, 09/1999
Pages: 498 - 502

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