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在V型薄荷-硫醇基深度溶解剂中的疏水分子的溶液动力学:成分组成的影响
Sagar Srivastava1, Sapana Sinha1, Sanyukta Bhattacharjee1
1Department of Chemistry, Indian Institute of Technology Patna, Patna 801103, Bihar, India. debabrata@iitp.ac.in.
Physical chemistry chemical physics : PCCP
|April 10, 2024
概括
这项研究研究了使用薄荷-硫醇混合物的V型深度溶解剂 (DES). 分析了库马林153的溶剂和旋转动力学,揭示了特定DES组合的更长的放松时间和与水力动力学模型的良好相关性.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 化学物理 化学物理
背景情况:
- 类型V深溶解剂 (DES) 是一种具有独特热力学性能的新型非离子溶解剂.
- 与其他DES类型相比,这些溶剂的探索较少,其物理化学仍处于研究的早期阶段.
- 了解溶剂和旋转动力学对于描述DES行为和潜在应用至关重要.
研究的目的:
- 为了研究一种基于薄荷 - 乙醇 (MT) 的V型深溶解剂 (DES) 的溶剂和旋转动力学.
- 探索薄荷醇和胆醇的不同摩尔比对这些动态的影响.
- 分析Stokes-Einstein-Debye (SED) 水力动力学模型对这些DES中的旋转动力学的适用性.
主要方法:
- 在三种摩尔比率上制备基于MT的DES: 1:1 (M1T1), 1:1.5 (M1T1.5) 和 2:1 (M2T1).
- 在不同温度下记录了素153 (C153) 的时间解析发射光谱 (TRES).
- 分析溶剂相关函数,旋转异构性衰变,并应用SED模型和Arrhenius类型方程.
主要成果:
- 发现溶剂放松衰变是双指数的,与M1T1.5和M1T1.1.相比,在M2T1 DES中观察到的平均溶解时间 (τs) 较长.
- 旋转重定位时间 (τrot) 与溶解时间相同,表明M2T1.1.中的分子运动较慢.
- C153的旋转动力学与SED模型有很好的相关性,在更高的温度 (更低的粘度) 中接近水力动力棒边界条件.
结论:
- 这项研究提供了关于V型DESs物理化学的见解,特别是薄荷-丁醇系统.
- 这些发现表明,这些DES中的溶液旋转动力学受到成分和温度的影响,与水力动力学理论有很好的相关性.
- 旋转运动,粘性流和非辐射通路的激活能用阿雷尼乌斯式方程成功相关联.
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