Use of β-13C labelled coniferyl alcohol to detect "end-wise" polymerization in the formation of DHPs
Use of β-13C labelled coniferyl alcohol to detect "end-wise" polymerization in the formation of DHPs
复制标题
DOI：
10.1515/hf.2000.102
复制
发表时间：
2000-01-01
期刊：
影响因子：
2.4
通讯作者：
Brunow, G
中科院分区：
文献类型：
--
作者：
Ämmälahti, E;Brunow, G
通过在含有预成型的未标记的聚合物DHP的介质中氧化β C-13标记的松柏醇，研究了预成型的脱氢聚合物（DHP）可以作为模板诱导DHP中更接近天然软木木质素的结构模式的可能性。实验在pH 4和pH 6.5下进行。用1D和2D NMR估计结构单元的分布。在未标记与均匀标记的DHP的比较中没有发现这样的模板效应。事实上，pH值对松柏醇偶联模式的影响比预形成的DHP的影响更大。
The possibility that preformed dehydrogenation polymer (DHP) could function as a template to induce a structural pattern in DHP more closely resembling that of natural softwood lignin was investigated by oxidizing beta C-13-labelled coniferyl alcohol in a medium containing preformed unlabelled polymeric DHP. The experiments were performed at pH 4 and pH 6.5. 1D and 2D NMR were used to estimate the distribution of structural units. No such template effect was found in a comparison of unlabelled with uniformly labelled DHP. Indeed, the effect of pH on the coupling pattern of coniferyl alcohol was geater than the effect of the preformed DHP.