期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 171, 期 7, 页码 1673-1680出版社
SPRINGER
DOI: 10.1007/s12010-013-0463-0
关键词
Catechol; Resorcinol; Hydroquinone; Laccase; Oxidation; Polymerization
资金
- National Natural Science Foundation of China [51173071, 21274055]
- Program for New Century Excellent Talents in University [NCET-12-0883]
- Natural Science Foundation of Jiangsu Province [BK2011157]
- Ph.D. Programs Foundation of Ministry of Education of China [20110093110003]
- Fundamental Research Funds for the Central Universities [JUSRP51312B]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1135]
Enzymatic polymerization of phenolic compounds (catechol, resorcinol, and hydroquinone) was carried out using laccase. The mechanism of polymerization and the structures of the polymers were evaluated in terms of UV-Vis and Fourier transform infrared spectroscopy. The molecular weights of the produced polyphenols were determined with GPC. The results showed that the phenolic monomers firstly turned into quinone intermediates by laccase catalysis. Through further oxidation, the intermediates formed covalent bonds. Finally, catechol units were linked together with ether bonds, and both resorcinol and hydroquinone units were linked together with C-C bonds. The number-average molecular weights of the polyphenols ranged from 1,000 to 1,400 Da (corresponding to the degree of polymerization that varied from 10 to 12) with a lower polydispersity value of about 1.10, showing selective polymerization of phenolic compounds catalyzed by laccase.
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