SOLID-STATE AMORPHIZATION OF ORGANIC MOLECULAR-CRYSTALS USING A VIBRATING MILL

被引:44
作者
TSUKUSHI, I [1 ]
YAMAMURO, O [1 ]
MATSUO, T [1 ]
机构
[1] OSAKA UNIV,FAC SCI,MICROCALORIMETRY RES CTR,TOYONAKA,OSAKA 560,JAPAN
关键词
DISORDERED SYSTEMS; ORGANIC CRYSTALS; X-RAY SCATTERING; THERMODYNAMIC PROPERTIES;
D O I
10.1016/0038-1098(95)00161-1
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The solid-state amorphization of organic molecular crystals was studied by differential scanning calorimetry (DSC) and X-ray powder diffraction. Two clathrate compounds of tri-O-methyl-beta-cyclodextrin (TMCD) containing p-nitrobenzoic acid (NEA) and p-hydroxybenzoic acid (HBA), and seven other organic compounds, sucrose (SUC), salicin (SAL), phenolphthalein (PP), 1,3,5-tri-alpha-naphthylbenzene (TNB), p-quaterphenyl (p-QP), p-terphenyl (p-TP) and 1,3,5-triphenylbenzene (TPB) were ground for 2-16 h with a vibrating mill at room temperature. A halo diffraction pattern and exothermic effect due to the crystallization were observed in TMCD-NBA, TMCD-HBA, SUC, SAL, PP and TNB, indicating amorphization of these crystals. The ability of solid-state amorphization in organic molecular crystals was discussed from a thermodynamic point of view.
引用
收藏
页码:1013 / 1018
页数:6
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