期刊
MAGNETIC RESONANCE IN CHEMISTRY
卷 47, 期 6, 页码 497-504出版社
WILEY
DOI: 10.1002/mrc.2423
关键词
NMR; H-1; C-13; microbial polymers; poly(hydroxyalkanoates); chemical composition; microstructure; statistical analysis
资金
- EU [026515-2, POCTI/BIO/55789/2004]
- [SFRH/BPD/24930/2005]
- [SFRH/BPD/14663/2003]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/14663/2003] Funding Source: FCT
NMR spectroscopy was applied for quantitative and qualitative characterization of the chemical composition and microstructure of a series of poly(3-hydroxybutyrate-co-3-hydoxyvalerate) copolymers, P(3HB-co-3HV), synthesized by mixed microbial cultures at several different feeding strategies. The monomer sequence distribution of the bacterially synthesized P(3HB-co-3HV) was defined by analysis of their high-resolution 1D C-13 NMR and 2D H-1/C-13 HSQC and H-1/C-13 HMBC NMR spectra. The results were verified by employment of statistical methods and suggest a block copolymer microstructure of the P(3HB-co-3HV) copolymers studied. Definitive distinction between block copolymers or a mixture of random copolymers could not be achieved. NMR spectral analysis indicates that the chemical composition and microstructure of the copolymers can be tuned by choosing a correct feeding strategy. Copyright (C) 2009 John Wiley & Sons, Ltd.
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