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arXiv 1501.04428physics.chem-ph
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溶液结合自由能的预测

Predicting binding free energies in solution

Jan H. Jensen

摘要:

最近的绝对结合自由能的主客体配合物在水溶液中使用电子结构理论的预测已经令人鼓舞的一些系统,而其他系统仍然存在问题的其他人。在论文中,我总结了一些在298 K下容易导致1-3 kcal/mol误差的因素:三体色散效应,分子对称性,非谐性,虚假虚频,构象采样不足,错误或改变电离状态,离子溶剂化自由能的误差,以及连续模型不能很好地代表的显式溶剂(和离子)效应。虽然我专注于结合自由能在水溶液中的方法也适用于(与微小的调整)任何自由能的差异,如构象或反应自由能的差异或活化自由能在任何溶剂。

英文摘要:

Recent predictions of absolute binding free energies of host-guest complexes in aqueous solution using electronic structure theory have been encouraging for some systems, while other systems remain problematic for others. In paper I summarize some of the many factors that could easily contribute 1-3 kcal/mol errors at 298 K: three-body dispersion effects, molecular symmetry, anharmonicity, spurious imaginary frequencies, insufficient conformational sampling, wrong or changing ionization states, errors in the solvation free energy of ions, and explicit solvent (and ion) effects that are not well-represented by continuum models. While I focus on binding free energies in aqueous solution the approach also applies (with minor adjustments) to any free energy difference such as conformational or reaction free energy differences or activation free energies in any solvent.

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。

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