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Spiral growth model for faceted crystals of non-centrosymmetric organic molecules grown from solution

机译:溶液生长非中心对称有机分子的多面晶体的螺旋生长模型

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摘要

The classical Burton-Cabrera-Frank (BCF) spiral growth model fails to work satisfactorily for many non-centrosymmetric organic molecules such as active pharmaceutical ingredients (APIs), nonlinear optical compounds, etc., due to the inherent assumption of Kossel crystal structure in the solid-state. We develop a more general mechanistic spiral growth model that enables morphology prediction for all kinds of organic molecules. We develop generalized expressions for kink density, kink incorporation rate, and step velocities for such molecules. Stable and unstable edges arising due to the complex bonding pattern are discussed and treated. We demonstrate the applicability of the model by correctly predicting the experimental morphologies of paracetamol and lovastatin grown from solution.
机译:传统的Burton-Cabrera-Frank(BCF)螺旋增长模型无法有效地满足许多非中心对称的有机分子(例如活性药物成分(API),非线性光学化合物等)的需求,这是由于科索尔晶体结构固有的假设所致。固态。我们开发了一种更通用的机械螺旋生长模型,该模型能够预测各种有机分子的形态。我们开发了此类分子扭结密度,扭结掺入率和步速的通用表达式。讨论并处理了由于复杂的粘合图案而产生的稳定和不稳定的边缘。我们通过正确预测从溶液中生长出来的扑热息痛和洛伐他汀的实验形态,证明了该模型的适用性。

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