来自生物基α-氧酸的无化物离子对有机催化剂,用于循环添加CO2到环氧化物
Ning Li1, Min Zhang1, Zhenjiang Li1
1State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China. guok@njtech.edu.cn.
开发了新的无化物有机催化剂,用于在环氧反应中循环添加二氧化碳. 这些基于生物衍生离子液体的催化剂为生产没有腐蚀性化物残留的循环碳酸盐提供了更绿色的替代方案.
科学领域:
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
- 材料科学 材料科学 材料科学
背景情况:
- 将二氧化碳循环添加到环氧化物 (CCE) 中,可获得用于电池和溶剂的有价值的循环碳酸盐.
- 目前的CCE催化剂经常使用腐蚀性化物,造成设备和产品污染的风险.
- 开发无化物催化剂对于可持续的CCE过程至关重要.
研究的目的:
- 设计和评估用于CCE反应的新型无化物有机催化剂.
- 探索生物基离子液体作为高效和非腐蚀性催化剂.
- 阐明这些新系统的催化机制.
主要方法:
- 从超强基和α-酸中合成无化物有机催化剂.
- 评估催化剂在二氧化碳循环添加到氧化 styrene 的性能.
- 使用1H NMR定位,中间捕获和控制实验的机制研究.
主要成果:
- 一系列无化物离子液体催化剂成功合成和测试.
- 最优的催化剂[DBUH][MAc]由DBU和曼德利酸衍生,实现了92%的产量和99%的选择性.
- 在中度条件下 (120°C,1.0MPa,12小时) 证明了2.5mol%负荷的催化活性.
结论:
- 超强基和α-酸的固态度基酸添加物作为有效的无化物CCE催化剂起作用.
- [DBUH][MAc]催化剂为循环碳酸盐合成提供了一个有希望的,非腐蚀性的替代品.
- 提出了一种涉及易斯酸/基相互作用和CO2激活的双功能激活机制,并得到实验证据的支持.
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