2-CHLORO-4,4,5,5-TETRAMETHYL-1,3,2-DIOXAPHOSPHOLANE, A REAGENT FOR THE ACCURATE DETERMINATION OF THE UNCONDENSED AND CONDENSED PHENOLIC MOIETIES IN LIGNINS
2-CHLORO-4,4,5,5-TETRAMETHYL-1,3,2-DIOXAPHOSPHOLANE, A REAGENT FOR THE ACCURATE DETERMINATION OF THE UNCONDENSED AND CONDENSED PHENOLIC MOIETIES IN LIGNINS
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DOI：
10.1021/jf00054a023
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发表时间：
1995-06-01
影响因子：
6.1
通讯作者：
ARGYROPOULOS, DS
中科院分区：
文献类型：
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作者：
GRANATA, A;ARGYROPOULOS, DS
使用2-氯-4，4，5，5-四甲基-1，3，2-二氧磷杂环戊烷作为磷酰化试剂在定量的P-31 NMR分析中的羟基在木质素已被彻底检查，并建议的实验方案的光谱采集已经开发。对六种“标准木质素”的定量分析结果与其他分析方法所得结果相当。观察到各种酚羟基环境的优异分辨率，包括那些存在于缩合部分中的酚羟基环境。然而，这是以脂肪族羟基区域的拆分为代价的，在脂肪族羟基区域中，不能区分β-O-4键的伯羟基、仲羟基和三种形式的仲羟基。
The use of 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane as a phosphitylation reagent in quantitative P-31 NMR analysis of the hydroxyl groups in lignins has been thoroughly examined, and an experimental protocol recommended for spectra acquisition has been developed. Quantitative analysis of six ''standard lignins'' gave results comparable to those obtained by other methods of analysis. Excellent resolution of the various phenolic hydroxyl environments including those present in condensed moieties was observed. However, this was at the expense of resolution in the aliphatic hydroxyl region, where no distinction between primary, secondary, and the erythro and three forms of the secondary hydroxyls of the beta-O-4 bonds can be made.