在Reline和DMSO的二元混合物中探索动力学和分子间相互作用:使用核磁共振和红外光谱技术的调查
Huan Chen1, Bona Dai2, Lingyun Xu3,4
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
The journal of physical chemistry. B
|January 17, 2025
概括
添加二甲基硫氧化物 (DMSO) 添加到reline (胆化物和尿素深溶解剂) 导致0.7摩尔分数的过渡. 这种转变增强了分子的移动性,改变了结,影响了混合物特性.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
背景情况:
- 雷林是一种胆化物和尿素深度浸泡溶剂 (DES),被广泛研究.
- 将reline与二甲基硫氧化物 (DMSO) 混合可以改善其性能.
- 了解DMSO对reline混合物的影响对于应用至关重要.
研究的目的:
- 研究reline/DMSO混合物的结构和动态变化.
- 为了确定不同的DMSO度对reline的特性的影响.
- 阐明这些混合物中结的作用.
主要方法:
- 使用了核磁共振 (NMR) 光谱 (1D 1H, 15N, 2D 1H-1H COSY).
- 雇佣的富里埃变换红外 (FT-IR) 光谱学.
- 分析了自我扩散系数和放松时间 (1H T1,T2).
主要成果:
- 在reline/DMSO混合物中观察到一个显著的过渡,DMSO的摩尔分数为0.7.
- 在0.7 DMSO 分数以上,增加了分子流动性和增强的扩散.
- 涉及-NH2和-OH组的键的破坏与增加的移动性相关.
- 尿素-胆相互作用在0.7 DMSO分数以上减弱,DMSO形成键.
结论:
- DMSO在0.7摩尔分数左右的reline混合物中诱导过渡,从粘性液体转变为非粘性溶液.
- 这种过渡的特点是增强的分子流动性和改变的键动态.
- 结果提供了对reline/DMSO混合物行为的见解,与模拟研究一致.
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