Detalhes bibliográficos
| Resumo: | Guaiacol oligomers were synthesized by enzyme-catalyzed polymerization with laccase as the catalyst. The polymerization procedure in aqueous media was followed by UV-Vis spectra. The oligomers were characterized by NMR and MALDI-TOF spectra. The UV-Vis spectra observation showed a new peak formed in the range of 380-530nm indicating that new substances formed. The NMR results indicated that phenolic hydroxyl participated in the polymerization. The MALDI-TOF spectra revealed the weight average polymerization degree of guaiacol oligomers is 10 and the mass of the repeating unit is 122. The thermal stability was studied by TGA/DSC analysis. Guaiacol oligomers were more thermally stable than guaiacol, which can be ascribed to the long -conjugated chains. Antioxidant behavior based on ABTS.+ radical showed a concentration-dependent activity and reached a plateau at 800g/mL. The prepared guaiacol oligomers displayed antimicrobial activity against Staphylococcus aureus and Escherichia coli, in which the inhibition percentage is up to 99%. |
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| Autores principais: | Li, Nannan |
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| Outros Autores: | Su, Jing; Wang, Hongbo; Cavaco-Paulo, Artur |
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| Assunto: | Laccase catalysis Polymerization Guaiacol oligomers Antimicrobial agent |
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| Ano: | 2021 |
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| País: | Portugal |
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| Tipo de documento: | artigo |
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| Tipo de acesso: | acesso restrito |
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| Instituição associada: | Universidade do Minho |
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| Idioma: | inglês |
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| Origem: | RepositóriUM - Universidade do Minho |
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