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Radost Herboth¹, Alexander P Lyubartsev¹

¹Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91 Stockholm, Sweden.

|September 2, 2024

概括

通过分子动力学研究碳二 (CBZ) 多态性,发现稳定晶体形式 (I 和 III) 热力学优于二酸盐. 表面的疏水性会影响能量,这表明这种重要的制药成分有非经典的结晶路径.

科学领域:

制药科学制药科学
材料科学材料科学材料科学
计算化学的计算化学

背景情况:

碳氨酸 (CBZ) 呈现多态性,不同的晶体形式可以显著影响药物的疗效和生物可用性.
了解CBZ的结晶路径对于控制其固态特性至关重要.

研究的目的:

为了研究二次核化过程中不同卡巴马泽 (CBZ) 多态的热力学优势.
通过计算模拟,阐明控制CBZ结晶的分子机制.
确定影响特定CBZ晶体形式的优先形成的关键因素.

主要方法:

利用分子动力学模拟与增强的采样方案,模拟CBZ吸附在不同多态的表面.
开发了一种新的方法来计算分子吸附的自由能量概况,重点关注与晶体结构一致的方向.
重缩吸附自由能量以隔离与晶体生长相一致的贡献.

主要成果:

热力学分析表明,最稳定的多态物 (III型和I型) 优先于二化物.
酸盐,通常是主要结晶产物,显示了不太有利的热力学,表明非经典的结晶路径.
表面水性被确定为影响CBZ吸附和晶体生长的能量的一个重要因素.

结论:

该研究提供了CBZ多态的热力学排名,提供了对其生长途径的见解.
研究结果表明,CBZ结晶可能涉及非经典机制,偏离了简单的核和生长.
了解这些分子通路对于控制CBZ多态性和确保药物的持续性能至关重要.

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