气相分子复合的热力学中的补偿关系
Andrey A Sokolov1, Mansur B Khisamiev1, Boris N Solomonov1
1Department of Physical Chemistry, Kazan Federal University, Kremlevskaya Str. 18, 420008 Kazan, Russia. MiIYagofarov@kpfu.ru.
Physical chemistry chemical physics : PCCP
|November 27, 2025
概括
热力学揭示了和变化之间的线性联系. 这项研究得出了在气相复杂化中的吉布斯能量和度的预测关系,通过实验和计算数据验证.
科学领域:
- 物理化学 物理化学
- 热力学是一种热力学.
- 计算化学的计算化学
背景情况:
- 补偿效应描述了相关热力学系统中 (ΔH) 和 (ΔS) 变化之间的线性相关性.
- 这些相关性在各种过程中被观察到,包括吉布斯能量 (ΔG) 与度关系,其起源已被广泛研究了90年.
- 现有的补偿图表对于描述特定的过程序列是有用的,但缺乏一般的预测能力.
研究的目的:
- 为了推导和验证基布斯能量 (ΔG) 和 (ΔH) 之间的预测关系,用于气相分子复杂化.
- 扩展以前关于溶解热力学中补偿效应的发现,以气相相互作用.
- 评估衍生关系作为分子间相互作用的预测工具的适用性.
主要方法:
- 应用赫斯定律来推导气相分子复合的 ΔG-ΔH 关系.
- 对67个复合体的实验约束平衡数据进行验证.
- 补充稀缺的实验数据与结合度的*ab initio*计算使用结合集群方法与完整的基础集外推.
主要成果:
- 确定了 ΔG 和 ΔH 之间的衍生关系,用于气相分子复合.
- 衍生关系与实验数据有很强的一致性,计算和预测的结合度之间根-平方平均偏差为2.7kJmol-1.
- 这些发现表明,在各种分子间相互作用中,无论是集体的还是对的,ΔG和ΔH都遵循一种共同的热力学关系.
结论:
- 衍生的热力学关系可以作为气相分子复杂化的预测工具.
- 这项研究暗示了一个统一的热力学关系,控制了不同阶段 (溶解,溶液和气相) 的集体和对联的分子间相互作用.
- 这些发现的未来应用在诸如超分子识别之类的复杂现象中具有显著的兴趣.
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