在极地液体中自我结合和溶解的相互作用
Valeria Amenta1, Joanne L Cook, Christopher A Hunter
1Department of Chemistry, University of Sheffield, Sheffield, S3 7HF United Kingdom.
Journal of the American Chemical Society
|August 7, 2013
概括
溶剂的自我结合对酒精,胺基和碳酸盐的溶解物有不同的影响. 由于暴露的相互作用部位,酒精仍然是有效的极性溶剂,与胺基和酸不同,其中自我结合与溶解物结合相竞争.
科学领域:
- 物理化学 物理化学
- 超分子化学 超分子化学
- 解决方案化学 解决方案化学
背景情况:
- 溶剂自我结合显著影响溶解物溶解.
- 了解这些相互作用对于预测溶剂行为至关重要.
- 极地溶剂表现出各种各样的自我关联模式.
研究的目的:
- 为了研究溶剂自我结合对溶液溶解的影响.
- 为了比较自我结合溶剂的溶解特性,如酒精,碳酸和胺.
- 阐明溶剂自我结合和溶剂-溶解物相互作用之间的竞争.
主要方法:
- 测量1:1复合物形成的关联常数,用于4 - 亚醇和三 - n - 丁氧化物之间的复合物形成.
- 在溶剂混合物中进行的实验:n-octane/n-decanol,n-octane/n-hexanoic acid和n-octane/2-ethylhexyl acetamide.
- 分析溶剂聚合状态如何影响键供体和受体溶液的溶解.
主要成果:
- 碳酸二元化,阻碍H键受体的溶解,同时保持H键捐赠者的溶解.
- 二次胺聚合,类似地竞争H键接受器溶解,但不是H键供体溶解.
- 酒精聚合物 (循环和线性) 保持了H-键供体和受体溶解的可访问位置,与单体不同.
结论:
- 碳酸和胺的自我结合与H键受体溶解物的溶解相竞争.
- 酒精的自我结合不会阻碍溶液的溶解,保持它们的高极性.
- 溶剂结构和自我关联决定了溶解能力和溶剂极性.
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