Endothermic transition, liquid crystal compound

Fig. 5.12 Melting and eutectic data for determining the stability relationship between the Y and ON modifications of 5-XII. Lower melting endotherms of the two modifications as pure crystals, and in the eutectics with four different reference compounds. Upper A G sT relationship for the two forms based on data derived from eqns 5.4—5.6. (T y and TmON indicate melting points of pure forms, Ti the transition temperature, L indicates the liquid phase and Lsc indicates the supercooled liquid phase.) (From Yu et al. 2000, with permission.)...

A well designed and properly replicated DSC profile would yield such physical properties as melting (endothermic), solid-state transitions (endothermic), glass transitions, crystallization (endothermic), decomposition (exothermic) and dehydration or desolvation (endothermic), purity (of high purity compounds though much less reliable than high-performance liquid chromatography, HPLC). 

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