arXivDaily arXiv每日学术速递 周一至周五更新
arXiv physics/0305113physics.chem-phphysics.bio-ph
收藏

HO $^-$(aq)的水化状态

The hydration state of HO$^-$(aq)

D. Asthagiri, Lawrence R. Pratt, J. D. Kress, M. A. Gomez

摘要:

HO $^-$(aq)离子参与无数具有生物和化学意义的水相化学过程。一个分子有效的描述其水合状态,目前知之甚少,是一个自然的先决条件,涉及HO $^-$(aq)的化学转化建模。在这里,它表明,统计力学准化学理论的解决方案预测,$\mathrm{HO\cdot[H_2O]_3{}^-}$是占主导地位的内壳配位结构HO $^-$(aq)在标准条件下。实验观察和其他理论计算引证支持这一结论。简单阳离子与HO $^-$(aq)的中性组合的水合自由能的评估和符合实验值。

英文摘要:

The HO$^-$(aq) ion participates in myriad aqueous phase chemical processes of biological and chemical interest. A molecularly valid description of its hydration state, currently poorly understood, is a natural prerequisite to modeling chemical transformations involving HO$^-$(aq). Here it is shown that the statistical mechanical quasi-chemical theory of solutions predicts that $\mathrm{HO\cdot[H_2O]_3{}^-}$ is the dominant inner shell coordination structure for HO$^-$(aq) under standard conditions. Experimental observations and other theoretical calculations are adduced to support this conclusion. Hydration free energies of neutral combinations of simple cations with HO$^-$(aq) are evaluated and agree well with experimental values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑