层状宿主中溶剂介质诱导的内部压力变化 VOPO4·2H2O以及对间接反应的影响
Jiahui Liu1, Yuan Liu2, Timothy Yoo2
1Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.
Journal of the American Chemical Society
|March 28, 2025
概括
溶剂的选择显著影响铁素与酸宿主之间的交互,通过改变内部宿主压力而影响反应速率和产物形成,而不是传统的溶剂与宿主相互作用.
科学领域:
- 材料科学
- 电化学
- 固态化学
背景情况:
- 分层酸二 (VOPO4·2H2O) 是一个潜在的宿主材料.
- 铁素是干研究中的常见客分子.
- 溶剂对间隔动力学和产品选择性的影响尚不完全理解.
研究的目的:
- 调查溶剂-宿主和溶剂-客体相互作用对铁素化成VOPO4·2H2O的影响.
- 确定不同溶剂如何影响间率和产生的产品阶段 (阶段1和阶段2).
- 探索内部宿主压力在调解间隙过程中的作用.
主要方法:
- 在七种非反应性溶剂中进行了铁间隔成VOPO4·2H2O.
- 使用现场和现场PXRD分析了间隔动力学和产品分布.
- 溶剂效应与溶剂特性相关,包括内部压力 (Peff) 和宿主的结构变化.
- 用密度函数理论 (DFT) 来建模压力对铁素扩散的影响.
主要成果:
- 在七种溶剂中的六种溶剂中发生了间隙,产生了第一阶段和第二阶段铁产品的混合物.
- 在溶剂系列中,反应速率和产品比率差异很大.
- 较快的动力学有利于第一阶段的产品,而较慢的动力学有利于第二阶段.
- 传统的溶剂-客体特性与动力学无关;然而,溶剂诱导的宿主内部压力变化 (Peff) 是如此.
- 溶剂改变了VOPO4·2H2O层间的间距,影响了Peff.
结论:
- 溶剂环境可以改变介质主体内的有效压力,影响介质动力学和产品选择.
- 这些溶剂诱导的压力变化是一个关键因素,取代了典型的溶剂-客体相互作用.
- 了解和控制内部主体压力对于优化层级材料的插入过程至关重要.
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