通过极化拉曼光谱和分子动力学揭示了水中烯碳酸盐混合物的结构演变
Jessica B Clark1, Tai Bowling-Charles1, Shamma Jabeen Proma1
1Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA. allen@chemistry.ohio-state.edu.
Physical chemistry chemical physics : PCCP
|August 30, 2023
概括
碳酸 (PC) 中的水分子自我聚合,形成不同的键网络. 这种在不同度下观察到的行为会影响到有限的水系统的结构.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 了解有限水度的系统的液体结构对于生物学,材料科学和电化学的应用至关重要.
- 碳酸 (PC) 是一个极性,近极性溶剂,对于离子电池技术至关重要.
研究的目的:
- 为了研究碳酸 (PC) 的结构变化,随着水的逐渐添加.
- 用一种新的综合方法来描述水-PC混合物中的结合和溶解.
主要方法:
- 结合了极化拉曼光谱和分子动力学模拟.
- 收集了极化拉曼光谱,用于从0.003到0.296.29的水分数.
- 分析了极化碳烯拉曼波段和OH拉伸区域光谱.
主要成果:
- 二碳酸的散体结构没有受到添加水的影响.
- 通过O-H拉伸光谱的高斯式拟合,在模拟的帮助下,确定了基于结的独特水的安排.
- 在PC中的水分子倾向于自我聚合,形成与散装溶剂分离的键网络.
结论:
- 烯碳酸盐中的水形成度依赖的,自我聚合的结构.
- 在中度度下,水分子可能会形成具有两个键的链条.
- 这些发现为极性近极溶剂中的有限水系统的溶解和结特性提供了新的见解.
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