在有机晶体结构预测中服陶托梅里斯
Cody J Perry1, Sebastian A Ramos1, Maria C Phelps1
1Department of Chemistry, University of California Riverside, Riverside, California 92521, United States.
Journal of the American Chemical Society
|July 18, 2025
概括
密度函数理论 (DFT) 模型无法预测分体晶体多态的能量,影响药物配方的开发. 一种新的混合DFT方法与合集群理论纠正相结合,提高了准确性,揭示了现有的梅本达晶体结构分析中的错误.
科学领域:
- 计算化学
- 固态化学
- 制药科学
背景情况:
- 陶托默症显著影响药物特性,如溶解性,稳定性,有效性和毒性.
- 计算机固体选有助于识别最佳药物配方,并减轻不良晶体形式带来的风险.
- 准确预测体晶体多态能量对于可靠的药物开发至关重要.
研究的目的:
- 评估广泛使用的密度函数在预测分体晶体多态能量的准确性.
- 调查密度驱动的移位错误对DFT预测的影响.
- 开发一种改进的计算方法来准确预测多元体.
主要方法:
- 应用各种密度函数 (DFT) 来建模分体晶体多态.
- 在DFT计算中分析密度驱动的移位错误.
- 混合DFT方法的开发和应用与分子内合集群 (CC) 理论的修正相结合.
- 固态核磁共振 (NMR) 光谱用于实验验证.
主要成果:
- 标准 DFT 模型在预测分体多态能量方面表现出显著的错误,低估了固态分体化障碍.
- 在约40%的案例中,陶托默多态能量差异可能超过10kJ/mol,DFT误差达到几十kJ/mol.
- 经过改进的混合DFT-CC方法与实验数据相一致.
- 该研究在实验报告的美本达B形式的晶体结构中发现了一个不正确的复合体,并通过固态NMR证实了这一点.
结论:
- 由于移位错误,广泛使用的 DFT 函数对于预测分体晶体多态能量是不可靠的.
- 准确的预测需要先进的计算方法,例如混合DFT与CC校正.
- 这些发现需要对涉及复合性药物配方的计算预测进行重新评估,并突出现有晶体结构分配中的潜在错误.
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