在晶体生长过程中,形成性自我毒害
Yumin Liu1,2, Veselina Marinova3, Roger J Davey1
1Department of Chemical Engineering, University of Manchester, Manchester M13 9PL, United Kingdom.
JACS Au
|May 2, 2025
概括
分子灵活性显著影响药物结晶. 较长链的二酸盐表现出较慢的晶体生长,原因是"形状自我中毒",其中小分子形状抑制结晶,但特定的溶剂可以减轻这种效应.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 晶体学 晶体学是指结晶学.
背景情况:
- 由于新的化合物结构,药物结晶变得越来越复杂.
- 了解分子灵活性在结晶中的作用对于控制晶体核和生长至关重要.
- 由于晶体结构的一致性和随着链条长度的增加而增加的灵活性,二酸盐提供了一个模型系统.
研究的目的:
- 为了研究分子灵活性对晶体生长动学的影响,在一系列的二氧化物中.
- 阐明晶体生长速率观察到的变化背后的分子水平机制.
- 确定克服分子灵活性所带来的结晶挑战的策略.
主要方法:
- 对二酸的晶体生长动力学的实验测量 (C4-C10).
- 计算良好度的元动力学模拟,以探索溶液中的 conformational 景观.
- 分析分子灵活性和晶体生长之间的结构属性关系.
主要成果:
- 晶体生长速度在链长达七个碳素时线性增加,然后急剧下降.
- 较长的链条观察到分子灵活性增加和形状景观的复杂性增加.
- 溶液中的小符合者被确定为强大的晶体生长抑制剂 (符合性自我中毒).
结论:
- 这项研究表明",形态自我中毒"是一种抑制晶体生长的新机制.
- 分子灵活性,而不仅仅是晶体结构,决定了灵活分子的生长抑制.
- 溶剂选择可以减轻构造性自我中毒,提供一种控制柔性化合物的结晶的策略.
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