Molecular structure of humin and melanoidin via solid state NMR.
Molecular structure of humin and melanoidin via solid state NMR.
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DOI:
10.1021/jp1119662
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发表时间:
2011-05-19
影响因子:
3.3
通讯作者:
Mamajanov, Irena
中科院分区:
文献类型:
--
作者:
Herzfeld, Judith;Rand, Danielle;Matsuki, Yoh;Daviso, Eugenio;Mak-Jurkauskas, Melody;Mamajanov, Irena
Sugar-derived humins and melanoidins figure significantly in food chemistry, agricultural chemistry, biochemistry and prebiotic chemistry. Despite wide interest and significant experimental attention, the amorphous and insoluble nature of the polymers has made them resistant to conventional structural characterization. Here we make use of solid-state NMR methods, including selective 13C substitution, 1H-dephasing, and double quantum filtration. The spectra, and their interpretation, are simplified by relying exclusively on hydronium for catalysis. The results for polymers derived from ribose, deoxyribose and fructose indicate diverse pathways to furans, suggest a simple route to pyrroles in the presence of amines, and reveal a heterogenous network-type polymer in which sugar molecules cross-link the heterocycles.
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影响因子:
3.1
作者:
AHMAD, T;KENNE, L;THEANDER, O
通讯作者:
THEANDER, O
影响因子:
4.4
作者:
BENNETT, AE;RIENSTRA, CM;GRIFFIN, RG
通讯作者:
GRIFFIN, RG
影响因子:
0.9
作者:
Lewkowski, Jaroslaw
通讯作者:
Lewkowski, Jaroslaw
DOI:
10.1006/jmra.1994.1208
发表时间:
1994-10-01
期刊:
JOURNAL OF MAGNETIC RESONANCE SERIES A
影响因子:
--
作者:
METZ, G;WU, XL;SMITH, SO
通讯作者:
SMITH, SO
DOI:
10.3891/acta.chem.scand.06-0867
发表时间:
1952-01-01
期刊:
ACTA CHEMICA SCANDINAVICA
影响因子:
--
作者:
ELMING, N;CLAUSONKAAS, N
通讯作者:
CLAUSONKAAS, N