FOX-7晶体的制备和热性质

Preparation and Thermal Properties of FOX-7

为了解FOX-7晶体形状和尺寸对其热性质的影响,通过冷却结晶和阻溶剂结晶的方法从DMF/H2O、NMP/H2O体系中获得FOX-7晶体。SEM结果表明,得到的晶体基本为延长的四面或六面棱柱和斜方菱晶两种类型,不同溶剂体系中得到晶体的尺寸不同和包含的颗粒数量也不同,超声处理得到的晶体具有单一形状,只是其表面较粗糙。DSC测试结果表明,不同结晶方式和不同溶剂体系中获得的FOX-7晶体的热性质有一定的差别。由此得出,不同的结晶方式和溶剂体系可以获得不同形状、尺寸和热性质的FOX-7晶体,而超声处理可以很好地控制晶体的形状。

In order to understand the influence of FOX-7 crystal shape and size on its thermal properties, the FOX-7 crystal was obtained from system DMF/H2O and NMP/H2O by cooling crystallization and the antisolvent crystallization. SEM results show that the obtained crystal have two shapes, namely extended tetrahedral or hexahedral prism and rhombohedral prismatic crystal. The size and contained number of particles of the crystal from different ratio system are different. The crystals shape by ultrasonic treatment was single, but the crystals surface is comparatively rough. DSC results show that the thermal properties of FOX-7 obtained by different ways and different solvent system have a certain degree of difference. This indicates that FOX-7 crystal with different shapes, sizes and thermal properties can be obtained by the crystallization in different ways and solvent system. The crystals shape was controlled by ultrasonic treatment.