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首页> 外文期刊>Crystal growth & design >Surface Mediated Structures: Stabilization of Metastable Polymorphs on the Example of Paracetamol
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Surface Mediated Structures: Stabilization of Metastable Polymorphs on the Example of Paracetamol

机译:表面介导的结构:对乙酰氨基酚的例子上亚稳态多晶型物的稳定化。

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摘要

The preparation of typically thermodynamically unstable polymorphic structures is a challenge. However, solid surfaces are well established aids for the formation and stabilization of polymorphic structures within, for instance, organic electronics. In this study, we report the stabilization of a pharmaceutically relevant substance via a solid surface at ambient conditions. Form III of paracetamol, which is typically unstable in the bulk at standard conditions, can be stabilized with a model silica surface by a standard spin coating procedure followed by rapid heat treatment. Such a preparation technique allows the use of atomic force microscopy and grazing incidence X-ray diffraction measurements revealing detailed information on the morphology and structure of the polymorph. Furthermore, the results exhibit that this polymorph is stable over a long period of time revealing surface mediated stabilization. These findings demonstrate a novel approach to provide thermodynamic stability when applied to similar molecules with specific applications.
机译:通常热力学不稳定的多晶型结构的制备是一个挑战。然而,固体表面是公认的用于例如在有机电子器件内形成和稳定多晶型结构的辅助材料。在这项研究中,我们报告了在环境条件下通过固体表面对药物相关物质的稳定作用。扑热息痛的III型通常在标准条件下通常不稳定,可以通过标准的旋涂步骤,然后通过快速热处理,用模型二氧化硅表面将其稳定。这种制备技术允许使用原子力显微镜和掠入射X射线衍射测量来揭示有关多晶型物的形态和结构的详细信息。此外,结果表明该多晶型物在长时间内是稳定的,表明表面介导的稳定化。这些发现证明了当应用于具有特定应用的相似分子时,提供热力学稳定性的新颖方法。

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