乙醇木质素的新型偶氮衍生物：合成、结构及光敏性能
New Azo Derivatives of Ethanol Lignin: Synthesis, Structure, and Photosensitive Properties.
作者信息
Borovkova Valentina S, Malyar Yuriy N, Vasilieva Natalia Yu, Skripnikov Andrey M, Ionin Vladislav A, Sychev Valentin V, Golubkov Viktor A, Taran Oxana P
机构信息
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/24, 660036 Krasnoyarsk, Russia.
School of Non-Ferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia.
出版信息
Materials (Basel). 2023 Feb 11;16(4):1525. doi: 10.3390/ma16041525.
Water-soluble azo derivatives of lignin were synthesized by the azo coupling reaction using organosolv ethanol lignin and diazonium salts based on sulfanilic acid and p-nitroaniline. The structure of azo derivatives of lignin were studied by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, and gel permeation chromatography. It was found that the azobenzene bonds formed in the azo coupling reaction of macromolecules impart the photosensitive properties to the synthesized polymers via cis-trans photoisomerization of the diazobenzene group. It was shown experimentally that the synthesized polymers exhibited good solubility both in the aqueous media in a wide (2-12) pH range and in DMSO and THF organic solvents, which opens up new prospects for their application.
以有机溶剂法制得的乙醇木质素和基于对氨基苯磺酸及对硝基苯胺的重氮盐为原料，通过偶氮偶联反应合成了木质素的水溶性偶氮衍生物。采用核磁共振、傅里叶变换红外光谱和凝胶渗透色谱对木质素偶氮衍生物的结构进行了研究。结果发现，在大分子的偶氮偶联反应中形成的偶氮苯键通过重氮苯基团的顺反光异构化赋予合成聚合物光敏性能。实验表明，合成的聚合物在较宽的pH范围（2-12）的水性介质以及二甲基亚砜和四氢呋喃有机溶剂中均表现出良好的溶解性，这为其应用开辟了新的前景。
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