Molecular structure of humin and melanoidin via solid state NMR.

Molecular structure of humin and melanoidin via solid state NMR.
复制标题

DOI:
10.1021/jp1119662
复制
发表时间:
2011-05-19
影响因子:
3.3
通讯作者:
Mamajanov, Irena
Mamajanov, Irena
中科院分区:
化学3区
文献类型:
--
作者:
Herzfeld, Judith;Rand, Danielle;Matsuki, Yoh;Daviso, Eugenio;Mak-Jurkauskas, Melody;Mamajanov, Irena

文献摘要

参考文献

被引文献

相似文献

糖衍生的胡敏素和类黑精在食品化学、农业化学、生物化学和益生元化学中具有重要意义。尽管广泛的兴趣和显着的实验关注,聚合物的无定形和不溶性的性质,使他们抵抗传统的结构表征。在这里,我们利用固态NMR方法,包括选择性13 C取代,1H-去相位,和双量子过滤。光谱和它们的解释,通过完全依赖于水合氢离子的催化作用而得到简化。来自核糖,脱氧核糖和果糖的聚合物的结果表明不同的途径呋喃,建议一个简单的途径吡咯胺的存在下,并揭示了一个异质的网络型聚合物,其中糖分子交联的杂环。
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.
DOI: 10.1016/0008-6215(95)00176-t
发表时间: 1995-10-23
影响因子: 3.1
作者:
AHMAD, T;KENNE, L;THEANDER, O
通讯作者: THEANDER, O
DOI: 10.1063/1.470372
发表时间: 1995-10-22
影响因子: 4.4
作者:
BENNETT, AE;RIENSTRA, CM;GRIFFIN, RG
通讯作者: GRIFFIN, RG
DOI: 10.3998/ark.5550190.0002.102
发表时间: 2001-01-01
期刊: ARKIVOC
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