Identification of three Diospysros species using FT-IR and 2DCOS-IR
Identification of three Diospysros species using FT-IR and 2DCOS-IR
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使用 FT-IR 和 2DCOS-IR 鉴定三种柿树属物种
DOI：
10.1016/j.molstruc.2020.128709
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发表时间：
2020-11-15
影响因子：
3.8
通讯作者：
Zhang, Qiu-hui
中科院分区：
文献类型：
--
作者：
Ma, Fang;Huang, An-min;Zhang, Qiu-hui
本文在系统分析杜松心材和醇提物的基础上，研究了杜松心材和醇提物的化学成分。ebenum、毛叶藓D. philippinensis和D.通过红外光谱（FT-IR、SD-IR和2DCOS-IR）三步分析，成功区分了3种相似的柿材。在FT-IR谱图中，主要化学成分为纤维素（在大约类似于1370、类似于1158、-1034和类似于895 cm（-1）处的条带），木质素（类似于2935、类似于1510、类似于1462和类似于1426 cm（-1）的带）和草酸钙（峰值类似于1615，类似于1318和类似于781 cm（-1））。样品与标准物质间的相关系数表明，D。ebenum富含木质素，D. celebica富含树脂，D. philippinensis含有较多的草酸钙。在SD-IR谱图中，D. philippinensis和D. Celebica在1731 cm（-1）处具有峰，意味着它们含有更多树脂。此外，D. ebenum在1651、1632、1584和1388 cm（-1）处具有较强的峰，这可以表征萘衍生物组分。通过2DCOS-IR同步光谱，三种心材木质素的C-H（在1450和-1460 cm（-1）附近的自动峰）都显示出较强的强度。木质素在D. ebenum的敏感性与D. philippinensis，但其热扰动略低于D.同时，在935-1255cm（-1）范围内，醇提物的Si-O和Si-C热敏性不同。此外，树脂和萘衍生物的C = O和C = N热扰动的差异也可以被认为是区分它们的关键因素。本研究表明，FT-IR和2DCOS-IR可以对乌木混伪材进行全面的分析和鉴别。(C)2020爱思唯尔B.V.保留所有权利。
Based on the systematic analysis of heartwood and alcohol extractives of D. ebenum, D. philippinensis and D. celebica by the three-step infrared spectroscopy (FT-IR, SD-IR and 2DCOS-IR), the three similar Diospyros wood are successful distinguished. In FT-IR spectra, the principal chemical components of heartwood are characterized for cellulose (the bands at around similar to 1370, similar to 1158, -1034 and similar to 895 cm(-1)), lignin (the bands around similar to 2935, similar to 1510, similar to 1462 and similar to 1426 cm(-1)) and calcium oxalate (peaks at similar to 1615, similar to 1318 and similar to 781 cm(-1)). The correlation coefficient among samples and standard material give the result that D. ebenum is lignin-rich and D. celebica is resin-rich, while D. philippinensis contains more calcium oxalate. In SD-IR spectra, D. philippinensis and D. celebica have peaks at 1731 cm(-1) mean they contain more resin. Besides, the alcohol extracts of D. ebenum possesses stronger peak at 1651, 1632, 1584 and 1388 cm(-1) which can be characterized for naphthalene derivatives component. Through the 2DCOS-IR synchronous spectra, the C-H of lignin (the auto peaks at similar to 1450 and -1460 cm(-1)) of three heartwoods show strong intensity. Lignin shows high thermal sensitivity in D. ebenum, while it is similar sensitive with cellulose in D. philippinensis, but it is slightly lower thermal perturbation than cellulose in D. celebica.Meanwhile, the thermal sensitivity of Si-O and Si-C of alcohol extractives are different in the range of 935-1255 cm(-1). In addition, the difference in thermal perturbation of C=O and C=N of resin and naphthalene derivatives could also be considered as the key factors to discriminate them. This research demonstrated that the FT-IR and 2DCOS-IR could analyze and discriminate confused ebony wood comprehensively. (C) 2020 Elsevier B.V. All rights reserved.