当前位置：
X-MOL 学术
›
J. Agric. Food Chem.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Polycyclic Aromatics Observed in Enzymatic Lignin by Spectral Characterization and Ruthenium Ion-Catalyzed Oxidation
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2021-10-08 , DOI: 10.1021/acs.jafc.1c04416 Yupeng Wang 1 , Yucui Hou 2 , Weize Wu 1 , He Li 1 , Shuhang Ren 1 , Jianwei Li 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2021-10-08 , DOI: 10.1021/acs.jafc.1c04416 Yupeng Wang 1 , Yucui Hou 2 , Weize Wu 1 , He Li 1 , Shuhang Ren 1 , Jianwei Li 1
Affiliation
|
It is generally considered that lignin is a three-dimensional amorphous polymer consisting of methoxylated phenylpropane structures. However, high yields of monomer structural units of lignin cannot be obtained through various ways, which inspired us to gain insights into the structures of lignin. Herein, enzymatic lignin (EL) was directly characterized by a solid-state 13C nuclear magnetic resonance spectrometer and Fourier transform infrared spectrometer and then subjected to ruthenium ion-catalyzed oxidation. According to the spectral characterization, it can be inferred that multi-ring aromatic clusters exist in EL because of the aromatic bridgehead carbon ratio of 0.136. Based on the results of ruthenium ion-catalyzed oxidation of the EL, it can be deduced that (1) double- and triple-aromatic ring clusters exist in the EL besides the traditional phenylpropane single-aromatic ring clusters, and (2) some aromatic rings with long-alkyl chain substituents exist in the EL, which is quite different from the traditional cognition of lignin. This investigation provides a new insight into the structure of EL.
中文翻译：
通过光谱表征和钌离子催化氧化在酶促木质素中观察到多环芳烃
一般认为木质素是由甲氧基苯丙烷结构组成的三维无定形聚合物。然而，木质素单体结构单元的高收率无法通过多种途径获得，这启发了我们深入了解木质素的结构。在此，酶促木质素 (EL) 的直接表征是固态13C核磁共振光谱仪和傅里叶变换红外光谱仪，然后进行钌离子催化氧化。根据光谱表征，由于芳族桥头碳比为0.136，可以推断EL中存在多环芳族簇。根据钌离子催化氧化EL的结果，可以推断出：（1）EL中除了传统的苯丙烷单芳香环簇外还存在双芳香环簇和三芳香环簇，（2）一些芳香环簇EL中存在具有长烷基链取代基的环，这与木质素的传统认知大不相同。这项研究提供了对EL结构的新见解。
更新日期：2021-10-20
中文翻译：
通过光谱表征和钌离子催化氧化在酶促木质素中观察到多环芳烃
一般认为木质素是由甲氧基苯丙烷结构组成的三维无定形聚合物。然而，木质素单体结构单元的高收率无法通过多种途径获得，这启发了我们深入了解木质素的结构。在此，酶促木质素 (EL) 的直接表征是固态13C核磁共振光谱仪和傅里叶变换红外光谱仪，然后进行钌离子催化氧化。根据光谱表征，由于芳族桥头碳比为0.136，可以推断EL中存在多环芳族簇。根据钌离子催化氧化EL的结果，可以推断出：（1）EL中除了传统的苯丙烷单芳香环簇外还存在双芳香环簇和三芳香环簇，（2）一些芳香环簇EL中存在具有长烷基链取代基的环，这与木质素的传统认知大不相同。这项研究提供了对EL结构的新见解。
京公网安备 11010802027423号