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生物质分离中的1--3-甲基基离子液-绿色溶剂或活性反应剂对素化合物?
Artyom V Belesov1, Dmitrii M Mazur2,3, Anna V Faleva1
1Core Facility Center 'Arktika', Northern (Arctic) Federal University, Arkhangelsk 163002, Russia.
International journal of molecular sciences
|December 17, 2024
概括
离子液 (ILs) 溶解了纤维素素,但可以将添加到纤维素中. 这项研究揭示了N,N'-dialkylimidazolium离子通过核友添加与素反应,在生物质溶解过程中形成含的化合物.
科学领域:
- 绿色化学和可持续的溶剂
- 生物质的分成和价值化.
- 聚合物化学和反应机制
背景情况:
- 基于N,N'-Dialkylimidazolium的离子液体 (IL) 是用于溶解纤维素生物质的有效溶剂.
- 观察到体纳入红素制剂,表明与IL子的强烈相互作用.
- 在IL辅助生物质加工过程中将融入素的机制尚不清楚.
研究的目的:
- 研究含有的素化合物形成的机制和途径.
- 为了澄清生物质溶解过程中IL和红素之间的相互作用的性质.
- 识别涉及的活性物种和反应途径.
主要方法:
- 用80-150°C的1--3-甲基利米达乙酸盐 (BmimOAc) 处理八种单体素相关的.
- 使用二维NMR光谱和高性能液体染色学高分辨率质谱测量来识别反应产品.
- 分析温度和溶解氧气对反应通路的影响.
主要成果:
- 含的红素化合物是通过在红素模型化合物上的电子缺陷组中核友性添加N-异环碳素 (脱Bmim) 形成的.
- 在反应产品中发现了共价结合的Bmim残留物.
- 反应性受温度,溶解氧和IL热降解产品的影响,这些产品作为额外的反应物种.
结论:
- 基于N,N'-Dialkylimidazolium的ILs在基纤维素溶解过程中与素活性反应,而不仅仅是作为被动溶剂.
- 相互作用涉及核友性添加IL (作为N-异环碳酸) 到素的功能组.
- 了解这些反应对于优化基于IL的生物提炼工艺和控制素产品成分至关重要.
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