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首页> 外文期刊>Crystal growth & design >Utilization of Surface Equilibria for Controlling Heterogeneous Nucleation: Making the 'Disappeared' Polymorph of 3-Aminobenzensulfonic Acid 'Reappear'
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Utilization of Surface Equilibria for Controlling Heterogeneous Nucleation: Making the 'Disappeared' Polymorph of 3-Aminobenzensulfonic Acid 'Reappear'

机译：利用表面平衡控制异相形核：使“ 3-氨基苯磺酸”的“消失”多晶型物“重新出现”

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摘要

The ability to control crystal form is essential for the development of materials with desired properties. The rational design of heterosurfaces to control nucleation is one such approach. Heterosurfaces are commonly selected based on their chemistry and/or crystallography and/or morphology. However, the heterosurface is almost always considered to be in equilibrium with the crystallization medium during nucleation. This may lead to an inaccurate description of the epitaxial mechanisms responsible for controlling nucleation. Herein, we discuss controlling the surface equilibria of sparingly soluble crystals to control heterogeneous nucleation and crystal form. The heterogeneous crystallization of 3-aminobenzensulfonic acid (3-ABSA) on seeds of 1,5-diaminonaphthalene (DAN) was investigated. The DAN crystal faces were determined to be in a nonequilibrium state upon suspension in an aqueous solution of 3-ABSA, resulting in significant changes in surface morphology. Controlling the kinetics of surface equilibration resulted in DAN seeds with differing surface morphologies. Seeding with these different surface morphologies led to the nucleation of different crystal forms of 3-ABSA, including the so-called "disappeared" polymorph, Form I. Utilizing surface equilibria to control heterogeneous nucleation represents a highly novel approach to controlling the crystal form.
机译：控制晶形的能力对于开发具有所需特性的材料至关重要。合理设计异质表面以控制形核是一种这样的方法。通常基于其化学和/或晶体学和/或形态来选择异质表面。然而，在成核过程中，几乎总是认为异质表面与结晶介质处于平衡状态。这可能导致对负责控制成核的外延机制的描述不正确。在这里，我们讨论控制微溶晶体的表面平衡，以控制异质形核和晶形。研究了3-氨基苯磺酸（3-ABSA）在1,5-二氨基萘（DAN）种子上的异质结晶。悬浮在3-ABSA水溶液中后，DAN晶面被确定为处于非平衡状态，从而导致表面形态发生重大变化。控制表面平衡的动力学导致DAN种子具有不同的表面形态。具有这些不同表面形态的晶种导致3-ABSA不同晶体形式的成核，包括所谓的“消失的”多晶型形式I。利用表面平衡来控制异质成核是控制晶体形式的一种非常新颖的方法。

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