STRUCTURAL CHARACTERIZATION OF THE LIGNINS FROM THE GREEN AND YELLOW BAMBOO OF BAMBOO CULM (Phyllostachys pubescens)
STRUCTURAL CHARACTERIZATION OF THE LIGNINS FROM THE GREEN AND YELLOW BAMBOO OF BAMBOO CULM (Phyllostachys pubescens)
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DOI：
10.1080/02773813.2015.1104544
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发表时间：
2016-01-01
影响因子：
2
通讯作者：
Yong, Qiang
中科院分区：
文献类型：
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作者：
Huang, Caoxing;He, Juan;Yong, Qiang
从毛竹(Phyllostachys Pubescens)中分离得到磨木木质素，分别命名为MWLg和MWLy。用定量C-13核磁共振(C-13)谱和二维异核信号量子相干核磁共振(2D HSQC)谱对木素制剂和剩余LCC的结构进行了表征。结果表明，MWLg和MWLy的主要亚结构为β-O-4烷基芳基醚、树脂、苯基香豆胶、螺二烯酮和α，β-二芳基醚，每100个Ar单元的丰度分别为38.2和39.8，6.9和6.3，3.8和2.9，1.7和2.1，0.4和0.3。MWLg和MWLy的S：G：H分别为40：54：6和51：44：5。绿竹木质素的伽马酰化程度为17.22%，低于黄竹木质素的伽马酰化程度(21.12%)。此外，在MWLg和MWLy中还检测到一种黄酮类化合物(Tricin)。部分碳水化合物残留在纯化的MWL制剂中，被认为是木质素-碳水化合物复合体(LCC)。
Milled wood lignins were isolated from green and yellow bamboo (Phyllostachys pubescens), termed MWLg and MWLy, respectively. The structural features of the lignin preparations and the remaining LCC were characterized by quantitative C-13 nuclear magnetic resonance (C-13 NMR) spectroscopy and two-dimensional heteronuclear signal quantum coherence NMR (2D HSQC NMR) spectroscopy. The results indicated that the main substructures in MWLg and MWLy were beta-O-4 alkyl-aryl ether, resinol, phenylcoumaran, spirodienone, and alpha,beta-diaryl ether, and their abundances per 100 Ar units were 38.2 and 39.8, 6.9 and 6.3, 3.8 and 2.9, 1.7 and 2.1, 0.4 and 0.3, respectively. The S:G:H ratios of MWLg and MWLy were estimated to be 40: 54: 6 and 51: 44: 5, respectively. The gamma-acylation of green bamboo lignin was 17.22%, lower than that of yellow bamboo lignin (21.12%). Moreover, a flavonoid compound (tricin) was also detected in the MWLg and MWLy. Some carbohydrates remained in the purified MWL preparations, which were considered as the lignin-carbohydrate complexes (LCC).