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首页> 外文期刊>Crystal growth & design >Crystallization Kinetics under Confinement. Manipulation of the Crystalline Form of Salol by Varying Pore Diameter
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Crystallization Kinetics under Confinement. Manipulation of the Crystalline Form of Salol by Varying Pore Diameter

机译：限制条件下的结晶动力学。通过改变孔径来控制Salol的结晶形式

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The crystallization and melting behavior of phenyl salicylate under confinement were studied by means of dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC). From the analysis of the kinetics of crystallization we established that crystals formed in bulk and under confinement are characterized by varying the rate of growth, dimensionality, and crystal lattice. It was shown that depending on the degree of confinement the crystallization can be accelerated or suppressed completely. Interestingly, we also found that the activation barrier for the crystallization either increases or decreases with respect to the bulk conditions. Further investigation of the melting temperature of the formed crystals indicated unequivocally that it is connected to the formation of different polymorphic forms of salol. Additional FTIR measurements confirmed that thesis. Based on calorimetric data obtained for the confined samples, we concluded that at pores of higher diameter the unstable (monoclinic) form is preferred, while at lower pores the original stable (orthorhombic) crystal is formed.
机译：利用介电谱（BDS）和差示扫描量热法（DSC）研究了水杨酸苯酯在受限条件下的结晶和熔融行为。通过对结晶动力学的分析，我们确定了散装和受限状态下形成的晶体的特征在于生长速率，尺寸和晶格的变化。结果表明，取决于限制程度，可以完全加速或抑制结晶。有趣的是，我们还发现，相对于整体条件，结晶的活化势垒要么增加要么减少。对形成的晶体的熔融温度的进一步研究明确地表明，它与不同的多晶型多酚形式的形成有关。额外的FTIR测量结果证实了这一观点。根据从受限样品获得的量热数据，我们得出结论，在较大直径的孔中，不稳定（单斜晶）形式是优选的，而在较小孔的情况下，则形成原始的稳定（斜方晶）晶体。

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