Phase behaviour of halogenated metal phthalocyanines
摘要:
The phase behaviour of chloro-aluminium phthalocyanine, chloro-indium phthalocyanine, bromoindium phthalocyanine, dichloro-tin phthalocyanine, and dichloro-platinum phthalocyanine is studied using differential scanning calorimetry, X-ray diffraction, and X-ray fluorescence. The shape of the thermograms obtained in the temperature range 150 to 350-degrees-C shows that the alpha-beta transition is characterized by two peaks of different magnitudes. The exothermic/endothermic behaviour varies for these materials suggesting that the phase transition may involve different mechanisms for different chlorinated compounds.